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| LT6210/LT6211 Single/Dual Programmable Supply Current, R-R Output, Current Feedback Amplifiers FEATURES s DESCRIPTIO s s s s s s s s APPLICATIO S s s s s s s , LTC and LT are registered trademarks of Linear Technology Corporation. C-Load and ThinSOT are trademarks of Linear Technology Corporation. Buffers Video Amplifers Cable Drivers Mobile Communication Low Power/Battery Applications TYPICAL APPLICATIO 5V VIN 3 Small Signal Response vs Supply Current 9 IS = 3mA GAIN AT LT6210 OUTPUT (dB) Line Driver Configuration for Various Supply Currents 6 IS = 300A + - 2 -5V RF 6 LT6210 1 5 RSET 75 75 CABLE VOUT 75 3 4 0 VS = 5V AV = 2 TA = 25C VOUT = 100mVP-P 1 10 100 FREQUENCY (MHz) -3 RG IS 6mA 3mA 300A RSET 20k 56k 1M RG 887 1.1k 11k RF 887 1.1k 11k RLOAD 150 150 1k 6210 TA01 -6 0.1 U Programmable Supply Current and Bandwidth: 10MHz at 300A per Amplifier up to 200MHz at 6mA per Amplifier Rail-to-Rail Output: 0.05V to 2.85V on 3V Single Supply High Slew Rate: 700V/s High Output Drive: 75mA Minimum Output Current C-LoadTM Op Amp Drives All Capacitive Loads Low Distortion: -70dB HD2 at 1MHz 2VP-P -75dB HD3 at 1MHz 2VP-P Fast Settling: 20ns 0.1% Settling for 2V Step Excellent Video Performance Into 150 Load: Differential Gain of 0.20%, Differential Phase of 0.10 Wide Supply Range: 3V to 12V Single Supply 1.5V to 6V Dual Supplies Small Size: Low Profile (1mm) 6-Lead SOT-23 (ThinSOTTM), 3mm x 3mm x 0.8mm DFN and 10-Lead MSOP Packages The LT(R)6210/LT6211 are single/dual current feedback amplifiers with externally programmable supply current and bandwidth ranging from 10MHz at 300A per amplifier to 200MHz at 6mA per amplifier. They feature a low distortion rail-to-rail output stage, 700V/s slew rate and a minimum output current drive of 75mA. The LT6210/LT6211 operate on supplies as low as a single 3V and up to either 12V or 6V. The ISET pin allows for the optimization of quiescent current for specific bandwidth, distortion or slew rate requirements. Regardless of supply voltage, the supply current is programmable from just 300A to 6mA per amplifier with an external resistor or current source. The LT6210 is available in the low profile (1mm) 6-lead SOT-23 package. The LT6211 is available in the 10-lead MSOP and the 3mm x 3mm x 0.8mm DFN packages. U 3 IS = 6mA 0 GAIN AT VOUT (dB) U -3 -6 -9 -12 1000 6210 TA01b 62101f 1 LT6210/LT6211 ABSOLUTE AXI U RATI GS Total Supply Voltage (V+ to V-) ........................... 13.2V Input Current ................................................. 10mA Output Current .............................................. 80mA Output Short-Circuit Duration (Note 2) ........... Indefinite Operating Temperature Range (Note 3) ... -40C to 85C Specified Temperature Range (Note 4) .... -40C to 85C PACKAGE/ORDER I FOR ATIO TOP VIEW OUT 1 V- 2 +IN 3 + - 6 V+ 5 ISET 4 -IN OUT A -IN A +IN A ISET A V - 1 2 3 4 5 - + - + S6 PACKAGE 6-LEAD PLASTIC SOT-23 TJMAX = 150C, JA = 230C/ W (NOTE 5) DD PACKAGE 10-LEAD (3mm x 3mm) PLASTIC DFN UNDERSIDE METAL CONNECTED TO V - (PCB CONNECTION OPTIONAL) TJMAX = 125C, JA = 43C/ W (NOTE 5) ORDER PART NUMBER LT6210CS6 LT6210IS6 S6 PART MARKING* LTA3 ORDER PART NUMBER LT6211CDD LT6211IDD *The temperature grades are identified by a label on the shipping container. Consult LTC Marketing for parts specified with wider operating temperature ranges. 2 U U W WW U W (Note 1) Junction Temperature (Note 5) ............................ 150C Junction Temperature (DD Package) ................... 125C Storage Temperature Range ................. -65C to 150C Storage Temperature Range (DD Package) ................................... -65C to 125C Lead Temperature (Soldering, 10 sec)................. 300C TOP VIEW 10 V + 9 OUT B 8 -IN B 7 +IN B 6 ISET B TOP VIEW OUT A -IN A +IN A ISET A V- 1 2 3 4 5 - + - + 10 9 8 7 6 V+ OUT B -IN B +IN B ISET B MS PACKAGE 10-LEAD PLASTIC MSOP TJMAX = 150C, JA = 120C/ W (NOTE 5) DD PART MARKING* LBCD ORDER PART NUMBER LT6211CMS LT6211IMS MS PART MARKING LTBBN LTBBP 62101f LT6210/LT6211 ELECTRICAL CHARACTERISTICS (IS = 6mA per Amplifier) The q denotes specifications which apply over the specified operating temperature range, otherwise specifications are at TA = 25C. For V+ = 5V, V- = - 5V: RSET = 20k to ground, AV = +2, RF = RG = 887, RL = 150; For V+ = 3V, V- = 0V: RSET = 0 to V-, AV = +2, RF = 887, RG = 887 to 1.5V, RL = 150 to 1.5V unless otherwise specified. SYMBOL PARAMETER VOS IIN+ IIN - en +in -in RIN+ CIN+ VINH VINL VOUTH Input Offset Voltage q CONDITIONS V+ = 5V, V- = -5V, IS = 6mA V+ = 3V, V- = 0V, IS = 6mA MIN TYP MAX MIN TYP MAX -1 -3.5 q UNITS mV mV A A A A nV/Hz pA/Hz pA/Hz M pF V 6 9 7 9 39 55 -1 -3 2.5 6.5 4.5 25 0.3 1.8 1.7 2 2.2 0.8 2.65 2.6 2.85 2.75 0.05 0.1 46 6.5 10 6.5 8 25 40 Noninverting Input Current Inverting Input Current q -13.5 f = 1kHz, RF = 887, RG = 46.4, RS = 0 f = 1kHz f = 1kHz VIN = V + - 1.2V to V - + 1.2V (Note 10) (Note 10) RL = 1k (Note 11) RL = 150 (Note 11) RL = 150 (Note 11) RL = 1k (Note 11) RL = 150 (Note 11) RL = 150 (Note 11) q Input Noise Voltage Density Input Noise Current Density Input Noise Current Density Noninverting Input Resistance Input Voltage Range, High Input Voltage Range, Low Output Voltage Swing, High 6.5 4.5 25 0.5 3.8 2 2 q q Noninverting Input Capacitance f = 100kHz 4.2 -4.2 -3.8 4.8 4.6 -4.95 -4.8 1.2 V V V V q 4.4 4.2 VOUTL Output Voltage Swing, Low q q -4.55 -4.4 0.3 0.35 V V V dB dB A/V A/V dB CMRR -ICMRR PSRR -IPSRR IS Common Mode Rejection Ratio VIN = V + - 1.2V to V - + 1.2V Inverting Input Current Common Mode Rejection Power Supply Rejection Ratio Inverting Input Current Power Supply Rejection Supply Current per Amplifier q 46 43 50 0.15 1.5 2 60 7 8 8.5 10 VIN = V + - 1.2V to V - + 1.2V q 0.2 85 2 5.8 7 8 8.3 9 VS = 1.5V to 6V (Note 6) VS = 1.5V to 6V (Note 6) q q 60 85 2 6 A/V A/V mA mA 62101f 3 LT6210/LT6211 ELECTRICAL CHARACTERISTICS (IS = 6mA per Amplifier) The + denotes specifications which apply q - over the specified operating temperature range, otherwise specifications are at TA = 25C. For V = 5V, V = - 5V: RSET = 20k to ground, AV = +2, RF = RG = 887, RL = 150; For V+ = 3V, V- = 0V: RSET = 0 to V-, AV = +2, RF = 887, RG = 887 to 1.5V, RL = 150 to 1.5V unless otherwise specified. V+ = 5V, V- = -5V, IS = 6mA SYMBOL PARAMETER IOUT ROL SR tpd BW ts tf, tr dG dP HD2 HD3 Maximum Output Current Transimpedance, VOUT/IIN - Slew Rate Propagation Delay -3dB Bandwidth Settling Time Differential Gain Differential Phase 2nd Harmonic Distortion 3rd Harmonic Distortion CONDITIONS RL = 0 (Notes 7, 11) VOUT = V+ - 1.2V to V - + 1.2V (Note 8) 50% VIN to 50% VOUT, 100mVP-P, Larger of tpd +, tpd - <1dB Peaking, AV = 1 To 0.1% of VFINAL, VSTEP = 2V (Note 9) (Note 9) f = 1MHz, VOUT = 2VP-P f = 1MHz, VOUT = 2VP-P q V+ = 3V, V- = 0V, IS = 6mA TYP MAX UNITS mA 115 200 2.4 120 25 3.5 0.35 0.20 -65 -75 k V/s ns MHz ns ns % Deg dBc dBc 45 MIN 75 65 500 TYP MAX MIN 115 700 1.5 200 20 2 0.20 0.10 -70 -75 65 Small-Signal Rise and Fall Time 10% to 90%, VOUT = 100mVP-P otherwise specifications are at TA = 25C. For V + = 5V, V - = - 5V: RSET = 56k to ground, AV = +2, RF = RG = 1.1k, RL = 150; For V + = 3V, V - = 0V: RSET = 10k to V -, AV = +2, RF = 1.27k, RG = 1.27k to 1.5V, RL = 150 to 1.5V unless otherwise specified. SYMBOL PARAMETER VOS IIN+ IIN - en +in -in RIN+ CIN+ VINH VINL VOUTH Input Offset Voltage q (IS = 3mA per Amplifier) The q denotes specifications which apply over the specified operating temperature range, CONDITIONS V+ = 5V, V- = -5V, IS = 3mA V+ = 3V, V- = 0V, IS = 3mA MIN TYP MAX MIN TYP MAX -1 -1.5 q UNITS mV mV A A A A nV/Hz pA/Hz pA/Hz M pF V 5.5 8.5 5 7 36 52 -1.5 -1.5 -3 7 1.5 15 1 1.8 2.5 2 2.1 0.9 2.6 2.55 2.9 2.8 0.05 0.1 46 5.5 8.5 5 7 15 20 Noninverting Input Current Inverting Input Current q -12 f = 1kHz, RF = 1.1k, RG = 57.6, RS = 0 f = 1kHz f = 1kHz VIN = V+ - 1.2V to V - + 1.2V (Note 10) (Note 10) RL = 1k (Note 11) RL = 150 (Note 11) RL = 150 (Note 11) RL = 1k (Note 11) RL = 150 (Note 11) RL = 150 (Note 11) = V+ - 1.2V to V - + 1.2V q q Input Noise Voltage Density Input Noise Current Density Input Noise Current Density Noninverting Input Resistance Input Voltage Range, High Input Voltage Range, Low Output Voltage Swing, High 7 1.5 15 0.5 3.8 3 2 q q Noninverting Input Capacitance f = 100kHz 4.1 -4.1 -3.8 4.8 4.6 -4.95 -4.8 1.2 V V V V q 4.3 4.1 VOUTL Output Voltage Swing, Low q -4.55 -4.4 0.3 0.35 V V V dB dB A/V A/V 62101f CMRR -ICMRR Common Mode Rejection Ratio VIN Inverting Input Current Common Mode Rejection 46 43 50 0.3 1.5 2 VIN = V+ - 1.2V to V - + 1.2V q 0.4 4 LT6210/LT6211 ELECTRICAL CHARACTERISTICS (IS = 3mA per Amplifier) The q denotes specifications which apply over the specified operating temperature range, otherwise specifications are at TA = 25C. For V + = 5V, V - = - 5V: RSET = 56k to ground, AV = +2, RF = RG = 1.1k, RL = 150; For V + = 3V, V - = 0V: RSET = 10k to V -, AV = +2, RF = 1.27k, RG = 1.27k to 1.5V, RL = 150 to 1.5V unless otherwise specified. V+ = 5V, V - = -5V, IS = 3mA SYMBOL PARAMETER PSRR -IPSRR IS IOUT ROL SR tpd BW ts tf, tr dG dP HD2 HD3 Power Supply Rejection Ratio Inverting Input Current Power Supply Rejection Supply Current per Amplifier q V+ = 3V, V - = 0V, IS = 3mA TYP 85 1.5 3 45 7 8 4.1 4.4 MAX UNITS dB A/V A/V mA mA mA 120 150 4.7 70 25 5.6 0.42 0.44 -60 -65 k V/s ns MHz ns ns % Deg dBc dBc 60 CONDITIONS VS = 1.5V to 6V (Note 6) VS = 1.5V to 6V (Note 6) q q MIN 60 TYP 85 1.5 3 MAX MIN 7 8 4.1 4.55 Maximum Output Current Transimpedance, VOUT/IIN - Slew Rate Propagation Delay -3dB Bandwidth Settling Time Differential Gain Differential Phase 2nd Harmonic Distortion 3rd Harmonic Distortion RL = 0 (Notes 7, 11) VOUT = V+ -1.2V to V - +1.2V (Note 8) 50% VIN to 50% VOUT, 100mVP-P, Larger of tpd +, tpd - <1dB Peaking, AV = 1 To 0.1% of VFINAL, VSTEP = 2V (Note 9) (Note 9) f = 1MHz, VOUT = 2VP-P f = 1MHz, VOUT = 2VP-P q 70 65 450 120 600 3.1 100 20 3 0.35 0.30 -65 -65 65 Small-Signal Rise and Fall Time 10% to 90%, VOUT = 100mVP-P otherwise specifications are at TA = 25C. For V + = 5V, V - = - 5V: RSET = 1M to ground, AV = +2, RF = RG = 11k, RL = 1k; For V + = 3V, V - = 0V: RSET = 270k to V -, AV = +2, RF = 9.31k, RG = 9.31k to 1.5V, RL = 1k to 1.5V unless otherwise specified. V+ = 5V, V - = -5V, IS = 300A V+ = 3V, V - = 0V, IS = 300A SYMBOL PARAMETER VOS IIN+ IIN - en +in -in RIN+ CIN+ VINH VINL VOUTH VOUTL Input Offset Voltage q (IS = 300A per Amplifier) The q denotes specifications which apply over the specified operating temperature range, CONDITIONS MIN TYP -1 0.2 MAX MIN 4.5 8 1 2 8.5 11 TYP -1.5 0.2 -0.5 13.5 0.75 5 MAX 4.5 8 1 1.5 3 4.5 UNITS mV mV A A A A nV/Hz pA/Hz pA/Hz M pF V Noninverting Input Current q Inverting Input Current q -3 f = 1kHz, RF = 13k, RG = 681, RS = 0 f = 1kHz f = 1kHz VIN = V + - 1.2V to V - + 1.2V (Note 8) (Note 10) (Note 10) RL = 1k (Note 11) q q Input Noise Voltage Density Input Noise Current Density Input Noise Current Density Noninverting Input Resistance 13.5 0.75 5 1 3.8 4.75 4.7 25 2 q q 1 1.8 -3.8 2.75 2.7 -4.85 -4.8 15 2 2.1 0.9 2.85 0.05 0.15 0.2 1.2 Noninverting Input Capacitance f = 100kHz Input Voltage Range, High Input Voltage Range, Low Output Voltage Swing, High Output Voltage Swing, Low 4.1 -4.1 4.85 -4.95 V V V V V 62101f RL = 1k (Note 11) q 5 LT6210/LT6211 ELECTRICAL CHARACTERISTICS (IS = 300A per Amplifier) The q denotes specifications which apply over the specified operating temperature range, otherwise specifications are at TA = 25C. For V + = 5V, V - = - 5V: RSET = 1M to ground, AV = +2, RF = RG = 11k, RL = 1k; For V + = 3V, V - = 0V: RSET = 270k to V-, AV = +2, RF = 9.31k, RG = 9.31k to 1.5V, RL = 1k to 1.5V unless otherwise specified. V + = 5V, V- = -5V, IS = 300A V + = 3V, V- = 0V, IS = 300A CONDITIONS = V + - 1.2V to V - + 1.2V q SYMBOL PARAMETER CMRR -ICMRR PSRR -IPSRR IS IOUT ROL SR tpd BW ts tf, tr HD2 HD3 MIN 46 43 TYP 50 0.15 MAX MIN TYP 46 MAX UNITS dB dB A/V A/V dB Common Mode Rejection Ratio VIN Inverting Input Current Common Mode Rejection Power Supply Rejection Ratio Inverting Input Current Power Supply Rejection Supply Current per Amplifier VIN = V + - 1.2V to V - + 1.2V q 1.5 2 60 2.2 4 0.525 0.6 10 0.2 85 0.4 0.3 2.2 4 0.38 0.43 VS = 1.5V to 6V (Note 6) VS = 1.5V to 6V (Note 6) q q 60 85 0.4 0.3 A/V A/V mA mA mA q Maximum Output Current Transimpedance, VOUT/IIN - Slew Rate Propagation Delay -3dB Bandwidth Settling Time 2nd Harmonic Distortion 3rd Harmonic Distortion RL = 0 (Notes 7, 11) VOUT = V+ - 1.2V to V- + 1.2V (Note 8) 50% VIN to 50% VOUT, 100mVP-P, Larger of tpd +, tpd - <1dB Peaking, AV = 1 To 0.1% of VFINAL, VSTEP = 2V f = 1MHz, VOUT = 2VP-P f = 1MHz, VOUT = 2VP-P q 30 300 120 660 170 30 10 200 40 -40 -45 65 120 20 50 7.5 300 50 -45 -45 k V/s ns MHz ns ns dBc dBc Small-Signal Rise and Fall Time 10% to 90%, VOUT = 100mVP-P Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: As long as output current and junction temperature are kept below the absolute maximum ratings, no damage to the part will occur. Depending on the supply voltage, a heat sink may be required. Note 3: The LT6210C/LT6211C is guaranteed functional over the operating temperature range of -40C to 85C. Note 4: The LT6210C/LT6211C is guaranteed to meet specified performance from 0C to 70C. The LT6210C/LT6211C is designed, characterized and expected to meet specified performance from -40C and 85C but is not tested or QA sampled at these temperatures. The LT6210I/ LT6211I is guaranteed to meet specified performance from -40C to 85C. Note 5: The LT6210 with no metal connected to the V - pin has a JA of 230C/W, however, thermal resistances vary depending upon the amount of PC board metal attached to Pin 2 of the device. With the LT6210 mounted on a 2500mm2 3/32" FR-4 board covered with 2oz copper on both sides and with just 20mm2 of copper attached to Pin 2, JA drops to 160C/W. Thermal performance can be improved even further by using a 4-layer board or by attaching more metal area to Pin 2. Thermal resistance of the LT6211 in MSOP-10 is specified for a 2500mm2 3/32" FR-4 board covered with 2oz copper on both sides and with 100mm2 of copper attached to Pin 5. Its performance can also be increased with additional copper much like the LT6210. To achieve the specified JA of 43C/W for the LT6211 DFN-10, the exposed pad must be soldered to the PCB. In this package, JA will benefit from increased copper area attached to the exposed pad. TJ is calculated from the ambient temperature TA and the power dissipation PD according to the following formula: TJ = TA + (PD * JA) The maximum power dissipation can be calculated by: PD(MAX) = (VS * IS(MAX)) + (VS/2)2/RLOAD Note 6: For PSRR and -IPSRR testing, the current into the ISET pin is constant, maintaining a consistent LT6210/LT6211 quiescent bias point. A graph of PSRR vs Frequency is included in the Typical Performance Characteristics showing +PSRR and -PSRR with RSET connecting ISET to ground. Note 7: While the LT6210 and LT6211 circuitry is capable of significant output current even beyond the levels specified, sustained short-circuit current exceeding the Absolute Maximum Rating of 80mA may permanently damage the device. Note 8: This parameter is guaranteed to meet specified performance through design and characterization. It is not production tested. Note 9: Differential gain and phase are measured using a Tektronix TSG120YC/NTSC signal generator and a Tektronix 1780R Video Measurement Set. The resolution of this equipment is 0.1% and 0.1. Five identical amplifier stages were cascaded giving an effective resolution of 0.02% and 0.02. Note 10: Input voltage range on 5V dual supplies is guaranteed by CMRR. On 3V single supply it is guaranteed by design and by correlation to the 5V input voltage range limits. Note 11: This parameter is tested by forcing a 50mV differential voltage between the inverting and noninverting inputs. 62101f 6 LT6210/LT6211 TYPICAL AC PERFOR A CE VS (V) 5 5 5 5 5 5 5 5 5 3, 0 3, 0 3, 0 3, 0 3, 0 3, 0 3, 0 3, 0 3, 0 IS (mA) per Amplifier 6 6 6 3 3 3 0.3 0.3 0.3 6 6 6 3 3 3 0.3 0.3 0.3 RSET () 20k 20k 20k 56k 56k 56k 1MEG 1MEG 1MEG 0 0 0 10k 10k 10k 270k 270k 270k AV 1 2 -1 1 2 -1 1 2 -1 1 2 -1 1 2 -1 1 2 -1 RL () 150 150 150 150 150 150 1k 1k 1k 150 150 150 150 150 150 1k 1k 1k RF () 1200 887 698 1690 1100 1200 13.7k 11k 10k 1100 887 806 1540 1270 1200 13k 9.31k 10k RG () -- 887 698 -- 1100 1200 -- 11k 10k -- 887 806 -- 1270 1200 -- 9.31k 10k SMALL-SIGNAL - 3dB BW, <1dB PEAKING (MHz) 200 160 140 100 100 80 10 10 10 120 100 100 70 60 60 7.5 7 7 SMALL-SIGNAL 0.1dB BW (MHz) 30 30 20 15 15 15 2 2 1.8 20 20 20 15 15 15 2 1.5 1.5 TYPICAL PERFOR A CE CHARACTERISTICS Supply Current per Amplifier vs Temperature 7.5 7.0 SUPPLY CURRENT (mA) SUPPLY CURRENT (mA) RL = 6.5 6.0 5.5 5.0 4.5 -50 -25 VS = 5V RSET = 20k TO GND VS = 1.5V RSET = 0 TO V - SUPPLY CURRENT (A) 50 25 75 0 TEMPERATURE (C) 100 6210 G01 UW 125 UW Supply Current per Amplifier vs Temperature 4.00 3.75 3.50 3.25 3.00 2.75 2.50 2.25 2.00 -50 -25 0 25 50 75 100 125 VS = 5V RSET = 56k TO GND VS = 1.5V RSET = 10k TO V - RL = 400 380 360 340 320 300 280 260 240 220 Supply Current per Amplifier vs Temperature RL = VS = 5V RSET = 1M TO GND VS = 1.5V RSET = 270k TO V - 200 -50 -25 TEMPERATURE (C) 6210 G02 50 25 0 75 TEMPERATURE (C) 100 125 6210 G03 62101f 7 LT6210/LT6211 TYPICAL PERFOR A CE CHARACTERISTICS (Supply Current Is Measured Per Amplifier) Input Noise Spectral Density (IS = 6mA per Amplifier) 100 INPUT NOISE (nV/Hz OR pA/Hz) INPUT NOISE (nV/Hz OR pA/Hz) -in 10 +in 1 en INPUT NOISE (nV/Hz OR pA/Hz) -in 10 en +in 1 0.1 0.001 0.01 0.1 1 FREQUENCY (kHz) 62101GO4 Input Offset Voltage vs Input Common Mode Voltage 20 5.0 INPUT COMMON MODE LIMIT (V) INPUT COMMON MODE LIMIT (V) 15 OFFSET VOLTAGE (mV) 10 5 0 -5 IS = 3mA RF = 1690 RL = 150 IS = 300A RF = 13.7k RL = 1k -10 V = 5V S IS = 6mA AV = 1 RF = 1200 -15 T = 25C A RL = 150 TYPICAL PART -20 -5 -4 -3 -2 -1 0 1 2 3 4 INPUT COMMON MODE VOLTAGE (V) Output Voltage Swing vs Temperature 5.0 4.8 OUTPUT HIGH 1.5 1.4 1.3 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) 4.4 -4.4 -4.6 -4.8 VS = 5V VCM = 0V VOS = 50mV IS = 6mA RL = 1k IS = 6mA RL = 150 IS = 300A RL = 1k 1.2 1.1 IS = 300A RL = 1k VS = 1.5V VCM = 0V VOS = 50mV IS = 300A RL = 1k OUTPUT VOLTAGE (V) 4.6 IS = 6mA RL = 1k IS = 6mA RL = 150 IS = 300A RL = 1k OUTPUT LOW -5.0 -50 -25 0 25 50 75 100 125 TEMPERATURE (C) 6210 G10 8 UW VS = 5V RL = 150 TA = 25C 10 62101 G07 Input Noise Spectral Density (IS = 3mA per Amplifier) 100 VS = 5V RL = 150 TA = 25C 100 Input Noise Spectral Density (IS = 300A per Amplifier) VS = 5V RL = 1k TA = 25C en 10 -in 1 +in 100 0.1 0.001 0.01 0.1 1 10 100 62101GO5 0.1 0.001 0.01 0.1 1 10 100 62101GO6 FREQUENCY (kHz) FREQUENCY (kHz) Input Common Mode Range vs Temperature 1.5 IS = 300A RF = 13.7k RL = 1k 1.0 0.5 0 -0.5 4.5 4.0 IS = 6mA RF = 1200 RL = 150 -4.0 -4.5 VS = 5V AV = 1 CMRR > 48dB TYPICAL PART IS = 300A RF = 13.7k RL = 1k 100 125 IS = 3mA RF = 1690 RL = 150 Input Common Mode Range vs Temperature IS = 300A RF = 13k RL = 1k IS = 6mA RF = 1100 RL = 150 IS = 3mA RF = 1540 RL = 150 5 -5.0 -50 -25 50 25 75 0 TEMPERATURE (C) VS = 1.5V IS = 300A -1.0 AV = 1 RF = 13k CMRR >46dB RL = 1k TYPICAL PART -1.5 50 100 -50 -25 25 75 0 TEMPERATURE (C) 125 62101 G08 62101 G09 Output Voltage Swing vs Temperature 5.0 4.8 OUTPUT HIGH 4.6 IS = 6mA RL = 100 4.4 4.2 4.0 3.8 3.6 Output Voltage Swing vs ILOAD IS = 3mA IS = 6mA -1.1 -1.2 -1.3 -1.4 IS = 300A IS = 6mA RL = 100 OUTPUT LOW 0 25 50 75 100 125 -1.5 -50 -25 VS = 5V VCM = 0V 3.2 VOS = 50mV TA = 25C 3.0 0 10 20 3.4 TEMPERATURE (C) 6210 G11 40 50 60 30 LOAD CURRENT (mA) 70 6210 G12 62101f LT6210/LT6211 TYPICAL PERFOR A CE CHARACTERISTICS Output Voltage Swing vs ILOAD -3.0 VS = 5V -3.2 VCM = 0V VOS = 50mV -3.4 T = 25C A 1.4 1.2 IS = 3mA IS = 6mA OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) -3.6 -3.8 -4.0 -4.2 -4.4 -4.6 -4.8 -5.0 0 10 20 IS = 300A IS = 3mA IS = 6mA 40 50 60 30 LOAD CURRENT (mA) 70 6210 G13 1.0 0.8 0.6 0.4 VS = 1.5V VCM = 0V 0.2 V = 50mV OS TA = 25C 0 0 10 20 IS = 300A OUTPUT VOLTAGE (V) CMRR and PSRR vs Frequency (IS = 6mA per Amplifier) 70 -PSRR 60 +PSRR CMRR 40 30 20 10 0 0.001 VS = 5V RL = 150 TA = 25C 70 60 REJECTION RATIO (dB) REJECTION RATIO (dB) 50 50 CMRR 40 30 20 10 0 0.001 REJECTION RATIO (dB) 0.01 0.1 1 FREQUENCY (MHz) 9 Frequency Response vs Closed Loop Gain (IS = 6mA per Amplifier) AV = 2 RF = RG = 887 6 GAIN (dB) GAIN (dB) GAIN (dB) 3 0 AV = 1 RF = 1.2k VS = 5V -3 R = 150 L AV = -1 TA = 25C RF = RG = 698 VOUT = 100mVP-P -6 0.1 10 100 1 FREQUENCY (MHz) UW 10 6210 G16 6210 G19 (Supply Current Is Measured Per Amplifier) Output Voltage Swing vs ILOAD VS = 1.5V VCM = 0V VOS = 50mV -0.3 T = 25C A -0.1 -0.5 -0.7 -0.9 IS = 300A -1.1 -1.3 70 6210 G14 Output Voltage Swing vs ILOAD IS = 3mA IS = 6mA 0 10 20 40 50 60 30 LOAD CURRENT (mA) 70 6210 G15 40 50 60 30 LOAD CURRENT (mA) -1.5 CMRR and PSRR vs Frequency (IS = 3mA per Amplifier) -PSRR +PSRR VS = 5V RL = 150 TA = 25C 70 60 CMRR and PSRR vs Frequency (IS = 300A per Amplifier) -PSRR +PSRR 50 CMRR 40 30 20 10 0 0.001 VS = 5V RL = 1k TA = 25C 100 0.01 0.1 1 FREQUENCY (MHz) 10 100 6210 G17 0.01 0.1 1 FREQUENCY (MHz) 10 6210 G18 9 Frequency Response vs Closed Loop Gain (IS = 3mA per Amplifier) AV = 2 RF = RG = 1100 Frequency Response vs Closed Loop Gain (IS = 300A per Amplifier) 9 AV = 2 RF = RG = 11k 6 6 3 3 AV = 1 RF = 13.7k 0 AV = -1 VS = 5V RF = RG = 1200 -3 R = 150 L TA = 25C AV = 1 VOUT = 100mVP-P RF = 1690 -6 0.1 10 100 1 FREQUENCY (MHz) 0 AV = -1 V = 5V RF = RG = 10k -3 RS = 150 L TA = 25C VOUT = 100mVP-P -6 0.1 10 1 FREQUENCY (MHz) 1000 1000 6210 G20 100 6210 G21 62101f 9 LT6210/LT6211 TYPICAL PERFOR A CE CHARACTERISTICS (Supply Current Is Measured Per Amplifier) 2nd and 3rd Harmonic Distortion vs Frequency (IS = 6mA per Amplifier) VS = 5V -10 RF = RG = 887 VOUT = 2VP-P -20 R = 150 L -30 TA = 25C - 40 -50 -60 -70 -80 -90 -100 0.01 0.1 1 10 FREQUENCY (MHz) 100 6210 G22 0 DISTORTION (dBc) DISTORTION (dBc) DISTORTION (dBc) HD2 HD3 Maximum Undistorted Output Sinusoid vs Frequency 10 9 OUTPUT VOLTAGE SWING (VP-P) 7 6 5 4 3 2 1 0 0.1 IS = 300A RF = RG = 11k RL = 1k IS = 6mA RF = RG = 887 RL = 150 OUTPUT IMPEDANCE () 100 IS = 300A RF = RG = 11k RL = 1k 10 IS = 6mA RF = RG = 887 RL = 150 CHANNEL SEPARATION (dB) 8 VS = 5V HD2, HD3 <-40dB AV = 2 TA = 25C 1 10 FREQUENCY (MHz) Overshoot vs Capacitive Load 70 OUTPUT SERIES RESISTANCE () 60 50 OVERSHOOT (%) 40 30 20 10 0 10 IS = 300A RF = RG = 11k RL = 1k 35 30 25 20 15 10 5 0 10 CAPACITIVE LOAD (pF) IS = 3mA RF = RG = 1100 RL = 150 IS = 6mA RF = RG = 887 RL = 150 VS = 5V AV = 2 VOUT = 100mVP-P TA = 25C 10000 6210 G28 100 1000 CAPACITIVE LOAD (pF) 10 UW 6210 G25 2nd and 3rd Harmonic Distortion vs Frequency (IS = 3mA per Amplifier) 0 -10 -20 -30 - 40 -50 -60 -70 -80 -90 -100 0.01 0.1 1 10 FREQUENCY (MHz) 100 6210 G23 2nd and 3rd Harmonic Distortion vs Frequency (IS = 300A per Amplifier) 0 -10 -20 -30 - 40 -50 -60 -70 -80 -90 -100 0.01 0.1 1 FREQUENCY (MHz) 10 6210 G24 VS = 5V RF = RG = 1.1k VOUT = 2VP-P RL = 150 TA = 25C HD2 VS = 5V RF = RG = 11k VOUT = 2VP-P RL = 1k TA = 25C HD2 HD3 HD3 Output Impedance vs Frequency 1000 VS = 5V AV = 2 TA = 25C 120 100 80 60 40 LT6211 Channel Separation vs Frequency RL = RL = 150 1 100 0.1 0.1 1 10 FREQUENCY (MHz) 100 500 6210 G26 VS = 5V 20 IS = 6mA RF = RG = 887 TA = 25C 0 0.1 10 1 FREQUENCY (MHz) 100 500 6210 G27 Maximum Capacitive Load vs Output Series Resistor 50 45 40 VS = 5V OVERSHOOT < 10% VOUT = 100mVP-P IS = 6mA RF = RG = 887 RL = TA = 25C 10000 Maximum Capacitive Load vs Feedback Resistor VS = 5V AC PEAKING < 3dB VOUT = 100mVP-P IS = 6mA R G = RF RL = 150 TA = 25C 1000 100 100 CAPACITIVE LOAD (pF) 1000 6210 G29 10 800 1000 1200 1400 1600 1800 FEEDBACK RESISTANCE () 2000 6210 G30 62101f LT6210/LT6211 TYPICAL PERFOR A CE CHARACTERISTICS (Supply Current Is Measured Per Amplifier) -3dB Small-Signal Bandwidth vs Supply Current 1000 AV = 2 VOUT = 100mVP-P TA = 25C VS = 5V VS = 1.5V 10 1000 900 800 SLEW RATE (V/s) 700 600 500 400 300 200 100 1 0.1 1 10 SUPPLY CURRENT PER AMPLIFIER (mA) 62101 G33 HARMONIC DISTORTION (dBc) -3dB BANDWIDTH (MHz) 100 Small-Signal Transient Response (IS = 6mA per Amplifier) OUTPUT (50mV/DIV) OUTPUT (50mV/DIV) VS = 5V TIME (10ns/DIV) VIN = 25mV RF = RG = 887 RSET = 20k TO GND RL = 150 62101 G34 VS = 5V TIME (10ns/DIV) VIN = 25mV RF = RG = 1.1k RSET = 56k TO GND RL = 150 OUTPUT (50mV/DIV) Large-Signal Transient Response (IS = 6mA per Amplifier) VS = 5V TIME (10ns/DIV) VIN = 1.75V RF = RG = 887 RSET = 20k TO GND RL = 150 62101 G37 VS = 5V TIME (10ns/DIV) VIN = 1.75V RF = RG = 1.1k RSET = 56k TO GND RL = 150 OUTPUT (2mV/DIV) OUTPUT (2V/DIV) OUTPUT (2V/DIV) UW Slew Rate vs Supply Current VS = 5V AV = 2 VOUT = 7VP-P TA = 25C RISING EDGE RATE FALLING EDGE RATE -30 1MHz 2nd and 3rd Harmonic Distortion vs Supply Current VS = 5V AV = 2 VOUT = 2VP-P TA = 25C -40 -50 HD2 -60 HD3 -70 0 0.1 1 10 SUPPLY CURRENT PER AMPLIFIER (mA) 62101 G32 -80 0.1 10 1 SUPPLY CURRENT PER AMPLIFIER (mA) 62101 G31 Small-Signal Transient Response (IS = 3mA per Amplifier) Small-Signal Transient Response (IS = 300A per Amplifier) 62101 G35 VS = 5V TIME (100ns/DIV) VIN = 25mV RF = RG = 11k RSET = 1M TO GND RL = 1k 62101 G36 Large-Signal Transient Response (IS = 3mA per Amplifier) Large-Signal Transient Response (IS = 300A per Amplifier) 62101 G38 VS = 5V TIME (100ns/DIV) VIN = 1.75V RF = RG = 11k RSET = 1M TO GND RL = 1k 62101 G39 62101f 11 LT6210/LT6211 APPLICATIO S I FOR ATIO Setting the Quiescent Operating Current (ISET Pin) The quiescent bias point of the LT6210/LT6211 is set with either an external resistor from the ISET pin to a lower potential or by drawing a current out of the ISET pin. However, the ISET pin is not designed to function as a shutdown. The LT6211 uses two entirely independent bias networks, so while each channel can be programmed for a different supply current, neither ISET pin should be left unconnected. A simplified schematic of the internal biasing structure can be seen in Figure 1. Figure 2 illustrates the results of varying RSET on 3V and 5V supplies. Note that shorting the ISET pin under 3V operation results in a quiescent bias of approximately 6mA. Attempting to bias the LT6210/LT6211 at a current level higher than 6mA by using a smaller resistor may result in instability and decreased performance. However, internal circuitry clamps the supply current of the part at a safe level of approximately 15mA in case of accidental connection of the ISET pin directly to a negative potential. V+ 6 600 600 8k 5 ISET TO BIAS CONTROL 6210 F01 Figure 1. Internal Bias Setting Circuitry SUPPLY CURRENT PER AMPLIFIER (mA) 10 VS = 5V RSET TO GND VS = 3V RSET TO GND 1 TA = 25C RL = 0.1 0.01 0.1 1 10 100 1000 RSET PROGRAMMING RESISTOR (k) 6210 F02 Figure 2. Setting RSET to Control IS 12 U Input Considerations The inputs of the LT6210/LT6211 are protected by backto-back diodes. If the differential input voltage exceeds 1.4V, the input current should be limited to less than the absolute maximum ratings of 10mA. In normal operation, the differential voltage between the inputs is small, so the 1.4V limit is generally not an issue. ESD diodes protect both inputs, so although the part is not guaranteed to function outside the common mode range, input voltages that exceed a diode beyond either supply will also require current limiting to keep the input current below the absolute maximum of 10mA. Feedback Resistor Selection The small-signal bandwidth of the LT6210/LT6211 is set by the external feedback resistors and the internal junction capacitances. As a result, the bandwidth is a function of the quiescent supply current, the supply voltage, the value of the feedback resistor, the closed-loop gain and the load resistor. Refer to the Typical AC Performance table for more information. Layout and Passive Components As with all high speed amplifiers, the LT6210/LT6211 require some attention to board layout. Low ESL/ESR bypass capacitors should be placed directly at the positive and negative supply (0.1F ceramics are recommended). For best transient performance, additional 4.7F tantalums should be added. A ground plane is recommended and trace lengths should be minimized, especially on the inverting input lead. Capacitance on the Inverting Input Current feedback amplifiers require resistive feedback from the output to the inverting input for stable operation. Capacitance on the inverting input will cause peaking in the frequency response and overshoot in the transient response. Take care to minimize the stray capacitance at the inverting input to ground and between the output and the inverting input. If significant capacitance is unavoidable in a given application, an inverting gain configuration should be considered. When configured inverting, the amplifier inputs do not slew and the effect of parasitics is greatly reduced. 62101f W UU LT6210/LT6211 APPLICATIO S I FOR ATIO Capacitive Loads The LT6210/LT6211 are stable with any capacitive load. Although peaking and overshoot may result in the AC transient response, the amplifier's compensation decreases bandwidth with increasing output capacitive load to ensure stability. To maintain a response with minimal peaking, the feedback resistor can be increased at the cost of bandwidth as shown in the Typical Performance Characteristics. Alternatively, a small resistor (5 to 35) can be put in series with the output to isolate the capacitive load from the amplifier output. This has the advantage that the amplifier bandwidth is only reduced when the capacitive load is present. The disadvantage of this technique is that the gain is a function of the load resistance. Power Supplies The LT6210/LT6211 will operate on single supplies from 3V to 12V and on split supplies from 1.5V to 6V. If split supplies of unequal absolute value are used, input offset voltage and inverting input current will shift from the values specified in the Electrical Characteristics table. Input offset voltage will shift 2mV and inverting input current will shift 0.5A for each volt of supply mismatch. Slew Rate Unlike a traditional voltage feedback op amp, the slew rate of a current feedback amplifier is not independent of the amplifier gain configuration. In a current feedback amplifier, both the input stage and the output stage have slew rate limitations. In the inverting mode, and for gains of 2 or more in the noninverting mode, the signal amplitude between the input pins is small and the overall slew rate is TYPICAL APPLICATIO 3V Cable Driver with Active Termination Driving back-terminated cables on single supplies usually results in very limited signal amplitude at the receiving end of the cable. However, positive feedback can be used to reduce the size of the series back termination resistor, thereby decreasing the attenuation between the series and shunt termination resistors while still maintaining controlled output impedance from the line-driving amplifier. U that of the output stage. For gains less than 2 in the noninverting mode, the overall slew rate is limited by the input stage. The input slew rate of the LT6210/LT6211 on 5V supplies with an RSET resistor of 20k (IS = 6mA) is approximately 600V/s and is set by internal currents and capacitances. The output slew rate is additionally constrained by the value of the feedback resistor and internal capacitance. At a gain of 2 with 887 feedback and gain resistors, 5V supplies and the same biasing as above, the output slew rate is typically 700V/s. Larger feedback resistors, lower supply voltages and lower supply current levels will all reduce slew rate. Input slew rates significantly exceeding the output slew capability can actually decrease slew performance in a positive gain configuration; the cleanest transient response will be obtained from input signals with slew rates slower than 1000V/s. Output Swing and Drive The output stage of the LT6210/LT6211 consists of a pair of class-AB biased common emitters that enable the output to swing rail-to-rail. Since the amplifiers can potentially deliver output currents well beyond the specified minimum short-circuit current, care should be taken not to short the output of the device indefinitely. Attention must be paid to keep the junction temperature of the IC below the absolute maximum rating of 150C if the output is used to drive low impedance loads. See Note 5 for details. Additionally, the output of the amplifier has reverse-biased ESD diodes connected to each supply. If the output is forced beyond either supply, large currents will flow through these diodes. If the current is limited to 80mA or less, no damage to the part will occur. Figure 3 shows the LT6210 using this "active termination" scheme on a single 3V supply. The amplifier is AC-coupled and in an inverting gain configuration to maximize the input signal range. The gain from VIN to the receiving end of the cable, VOUT, is set to -1. The effective impedance looking into the amplifier circuit from the cable is 50 throughout the usable bandwidth. 62101f W U UU 13 LT6210/LT6211 TYPICAL APPLICATIO The response of the cable driver with a 1MHz sinusoid is shown in Figure 4. The circuit is capable of transmitting a 1.5VP-P undistorted sinusoid to the 50 termination 3V 2k 1% 2k 1% 3V 4 2.2F 249 1% VIN 1.3k 1% RSER 15 1% VA 3300pF NPO + - 5 6 LT6210 1 2 154 1% 3 Figure 3. 3V Cable Driver with Active Termination SI PLIFIED SCHE ATIC V+ 6 +IN 3 600 600 V- 8k V- 2 5 ISET 6210 SS PACKAGE DESCRIPTIO 3.50 0.05 1.65 0.05 2.15 0.05 (2 SIDES) PACKAGE OUTLINE 0.25 0.05 0.50 BSC 2.38 0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS PIN 1 TOP MARK (SEE NOTE 5) NOTE: 4. EXPOSED PAD SHALL BE SOLDER PLATED 1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-2). CHECK THE LTC WEBSITE DATA SHEET FOR CURRENT STATUS OF VARIATION ASSIGNMENT 5. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE 2. ALL DIMENSIONS ARE IN MILLIMETERS 3. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE 14 U U resistor and has a full signal 1VP-P bandwidth of 50MHz. Small signal -3dB bandwidth extends from 1kHz to 56MHz with the selected coupling capacitors. VIN 1V/DIV 2.2F VOUT RTERM 50 6210 F03 VA 1V/DIV VOUT 1V/DIV 200ns/DIV 6210 F04 Figure 4. Response of Circuit at 1MHz W W V+ -IN 4 OUTPUT BIAS CONTROL OUT 1 SUPPLY CURRENT CONTROL DD Package 10-Lead Plastic DFN (3mm x 3mm) (Reference LTC DWG # 05-08-1699) 0.675 0.05 R = 0.115 TYP 6 0.38 0.10 10 3.00 0.10 (4 SIDES) 1.65 0.10 (2 SIDES) (DD10) DFN 0403 5 0.200 REF 0.75 0.05 2.38 0.10 (2 SIDES) 1 0.25 0.05 0.50 BSC 0.00 - 0.05 BOTTOM VIEW--EXPOSED PAD 62101f LT6210/LT6211 PACKAGE DESCRIPTIO 0.889 0.127 (.035 .005) 5.23 (.206) MIN 3.20 - 3.45 (.126 - .136) DETAIL "A" 0.50 0.305 0.038 (.0197) (.0120 .0015) BSC TYP RECOMMENDED SOLDER PAD LAYOUT NOTE: 1. DIMENSIONS IN MILLIMETER/(INCH) 2. DRAWING NOT TO SCALE 3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX 0.62 MAX 0.95 REF 3.85 MAX 2.62 REF RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 0.20 BSC 1.00 MAX DATUM `A' 0.30 - 0.50 REF NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 2. DRAWING NOT TO SCALE 3. DIMENSIONS ARE INCLUSIVE OF PLATING 0.09 - 0.20 (NOTE 3) Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. U MS Package 10-Lead Plastic MSOP (Reference LTC DWG # 05-08-1661) 3.00 0.102 (.118 .004) (NOTE 3) 10 9 8 7 6 0.497 0.076 (.0196 .003) REF 0.254 (.010) GAUGE PLANE 12345 0.53 0.152 (.021 .006) 1.10 (.043) MAX 0.86 (.034) REF DETAIL "A" 0 - 6 TYP 4.90 0.152 (.193 .006) 3.00 0.102 (.118 .004) (NOTE 4) 0.18 (.007) SEATING PLANE 0.17 - 0.27 (.007 - .011) TYP 0.127 0.076 (.005 .003) MSOP (MS) 0603 0.50 (.0197) BSC S6 Package 6-Lead Plastic TSOT-23 (Reference LTC DWG # 05-08-1636) 2.90 BSC (NOTE 4) 1.22 REF 1.4 MIN 2.80 BSC 1.50 - 1.75 (NOTE 4) PIN ONE ID 0.95 BSC 0.30 - 0.45 6 PLCS (NOTE 3) 0.80 - 0.90 0.01 - 0.10 1.90 BSC S6 TSOT-23 0302 4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR 5. MOLD FLASH SHALL NOT EXCEED 0.254mm 6. JEDEC PACKAGE REFERENCE IS MO-193 62101f 15 LT6210/LT6211 TYPICAL APPLICATIO S Line Driver with Power Saving Mode In applications where low distortion or high slew rate are desirable but not necessary at all times, it may be possible to decrease the LT6210 or LT6211's quiescent current when the higher power performance is not required. Figure 5 illustrates a method of setting quiescent current with a FET switch. In the 5V dual supply case pictured, shorting the ISET pin through an effective 20k to ground sets the supply current to 6mA, while the 240k resistor at the ISET pin with the FET turned off sets the supply current to approximately 1mA. The feedback resistor of 4.02k is selected to minimize peaking in low power mode. The R3 4.02k 4 VIN 5V - LT6210 6 2 5 -5V 1 RLOAD 150 AMPLITUDE (dB) 3 + R1 240k HS/LP R2 22k 2N7002 6210 F05 Figure 5. Line Driver with Low Power Mode Figure 6. Frequency Response for Full Speed and Low Power Mode RELATED PARTS PART NUMBER DESCRIPTION COMMENTS Single, Dual and Quad Current Feedback Amplifiers Single, Dual and Quad Current Feedback Amplifiers Dual and Triple Current Feedback Amplifiers Dual Current Feedback Amplifier Single and Dual Voltage Feedback Amplifiers Single, Dual and Quad Voltage Feedback Amplifiers LT1252/LT1253/LT1254 100MHz Low Cost Video Amplifiers LT1395/LT1396/LT1397 400MHz, 800V/s Amplifiers LT1398/LT1399 LT1795 LT1806/LT1807 300MHz Amplifiers with Shutdown 50MHz, 500mA Programmable IS Amplifier 325MHz, 140V/s Rail-to-Rail I/O Amplifiers LT1815/LT1816/LT1817 220MHz, 1500V/s Programmable IS Operational Amplifier 16 Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 q FAX: (408) 434-0507 q U bandwidth of the LT6210 in this circuit increases from about 40MHz in low power mode to over 200MHz in full speed mode, as illustrated in Figure 6. Other AC specs also improve significantly at the higher current setting. The following table shows harmonic distortion at 1MHz with a 2VP-P sinusoid at the two selected current levels. Harmonic Distortion LOW POWER HD2 HD3 -53dBc -46dBc HD2 HD3 FULL SPEED -68dBc -77dBc 3 2 1 0 -1 -2 -3 -4 -5 -6 0 TA = 25C VOUT = 100mVP-P 1 10 100 FREQUENCY (MHz) 1000 6210 F06 FULL SPEED MODE IS = 6mA LOW POWER MODE IS = 1mA VOUT 62101f LT/TP 0204 1K * PRINTED IN USA www.linear.com (c) LINEAR TECHNOLOGY CORPORATION 2003 |
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