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| (R) EL2126 Data Sheet May 2, 2007 FN7046.4 Ultra-Low Noise, Low Power, Wideband Amplifier The EL2126 is an ultra-low noise, wideband amplifier that runs on half the supply current of competitive parts. It is intended for use in systems such as ultrasound imaging where a very small signal needs to be amplified by a large amount without adding significant noise. Its low power dissipation enables it to be packaged in the tiny SOT-23 package, which further helps systems where many input channels create both space and power dissipation problems. The EL2126 is stable for gains of 10 and greater and uses traditional voltage feedback. This allows the use of reactive elements in the feedback loop, a common requirement for many filter topologies. It operates from 2.5V to 15V supplies and is available in the 5 Ld SOT-23 and 8 Ld SO packages. The EL2126 is fabricated in Elantec's proprietary complementary bipolar process, and is specified for operation over the full -40C to +85C temperature range. Features * Voltage noise of only 1.3nV/Hz * Current noise of only 1.2pA/Hz * 200V offset voltage * 100MHz -3dB BW for AV = 10 * Very low supply current - 4.7mA * SOT-23 package * 2.5V to 15V operation * Pb-free plus anneal available (RoHS compliant) Applications * Ultrasound input amplifiers * Wideband instrumentation * Communication equipment * AGC and PLL active filters * Wideband sensors Pinouts EL2126 (5 LD SOT-23) TOP VIEW OUT 1 VS- 2 + IN+ 3 4 IN5 VS+ EL2126 (8 LD SOIC) TOP VIEW NC 1 IN- 2 IN+ 3 VS- 4 8 NC 7 VS+ 6 OUT 5 NC + 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2002, 2005, 2007. All Rights Reserved All other trademarks mentioned are the property of their respective owners. EL2126 Ordering Information PART NUMBER EL2126CW-T7 EL2126CW-T7A EL2126CS EL2126CS-T7 EL2126CS-T13 EL2126CSZ ( Note) EL2126CSZ-T7 ( Note) EL2126CSZ-T13 ( Note) EL2126CWZ-T7 (Note) EL2126CWZ-T7A (Note) G G 2126CS 2126CS 2126CS 2126CSZ 2126CSZ 2126CSZ BAAH BAAH PART MARKING TEMP RANGE (C) -40 to +85 -40 to +85 -40 to +85 -40 to +85 -40 to +85 -40 to +85 -40 to +85 -40 to +85 -40 to +85 -40 to +85 TAPE AND REEL 7" (3k pcs) 7" (250 pcs) 7" 13" 7" 13" 7" 7" PACKAGE 5 Ld SOT-23 5 Ld SOT-23 8 Ld SOIC (150 mil) 8 Ld SOIC (150 mil) 8 Ld SOIC (150 mil) 8 Ld SOIC (150 mil) (Pb-free) 8 Ld SOIC (150 mil) (Pb-free) 8 Ld SOIC (150 mil) (Pb-free) 5 Ld SOT-23 (SC74) (1.65mm) (Green) 5 Ld SOT-23 (SC74) (1.65mm) (Green) PKG. DWG. # MDP0038 MDP0038 MDP0027 MDP0027 MDP0027 MDP0027 MDP0027 MDP0027 P5.064 P5.064 NOTE: Intersil Pb-free products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. 2 FN7046.4 May 2, 2007 EL2126 Absolute Maximum Ratings VS+ to VS-) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33V Continuous Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . 40mA Any Input . . . . . . . . . . . . . . . . . . . . . . . . . . . VS+ -0.3V to VS- +0.3V Thermal Information Operating Temperature . . . . . . . . . . . . . . . . . . . . . . .-40C to +85C Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . .-60C to +150C Maximum Die Junction Temperature . . . . . . . . . . . . . . . . . . . +150C Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Curves Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below http://www.intersil.com/pbfree/Pb-FreeReflow.asp CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typical values are for information purposes only. Unless otherwise noted, all tests are at the specified temperature and are pulsed tests, therefore: TJ = TC = TA Electrical Specifications Parameter DC PERFORMANCE VOS VS+ = +5V, VS- = -5V, TA = +25C, RF = 180, RG = 20, RL = 500 Unless Otherwise Specified. Conditions Min Typ Max Unit Description Input Offset Voltage (SO8) Input Offset Voltage (SOT23-5) 0.2 2 3 mV mV V/C A TCVOS IB IOS TCIB CIN AVOL PSRR CMRR CMIR VOUTH VOUTL VOUTH2 VOUTL2 IOUT ISY Offset Voltage Temperature Coefficient Input Bias Current Input Bias Current Offset Input Bias Current Temperature Coefficient Input Capacitance Open Loop Gain Power Supply Rejection Ratio (Note 1) Common Mode Rejection Ratio Common Mode Input Range Positive Output Voltage Swing Negative Output Voltage Swing Positive Output Voltage Swing Negative Output Voltage Swing Output Short Circuit Current (Note 2) Supply Current No load, RF = 1k No load, RF = 1k RL = 100 RL = 100 80 3.2 at CMIR VO = -2.5V to +2.5V 80 80 75 -4.6 3.8 -10 17 -7 0.06 0.013 2.2 87 100 106 3.8 3.8 -4 3.45 -3.5 100 4.7 5.5 -3.2 -3.9 0.6 A A/C pF dB dB dB V V V V V mA mA AC PERFORMANCE - RG = 20, CL = 3pF BW BW 0.1dB BW 1dB Peaking SR OS -3dB Bandwidth, RL = 500 0.1dB Bandwidth, RL = 500 1dB Bandwidth, RL = 500 Peaking, RL = 500 Slew Rate Overshoot, 4VP-P Output Square Wave Settling Time to 0.1% of 1V Pulse VOUT = 2VP-P, measured at 20% to 80% Positive Negative 80 100 17 80 0.6 110 2.8 -7 51 MHz MHz MHz dB V/s % % ns tS 3 FN7046.4 May 2, 2007 EL2126 Electrical Specifications Parameter VN IN HD2 HD3 NOTES: 1. Measured by moving the supplies from 4V to 6V 2. Pulse test only and using a 10 load 3. Frequency = 1MHz, VOUT = 2VP-P, into 500 and 5pF load VS+ = +5V, VS- = -5V, TA = +25C, RF = 180, RG = 20, RL = 500 Unless Otherwise Specified. Conditions Min Typ 1.3 1.2 -70 -70 Max Unit nV/Hz pA/Hz dBc dBc Description Voltage Noise Spectral Density Current Noise Spectral Density 2nd Harmonic Distortion (Note 3) 3rd Harmonic Distortion (Note 3) Electrical Specifications Parameter DC PERFORMANCE VOS VS+ = +15V, VS- = -15V, TA = 25C, RF = 180, RG = 20, RL = 500 unless otherwise specified. Description Conditions Min Typ Max Unit Input Offset Voltage (SO8) Input Offset Voltage (SOT23-5) 0.5 3 3 mV mV V/C A TCVOS IB IOS TCIB CIN AVOL PSRR CMRR CMIR VOUTH VOUTL VOUTH2 VOUTL2 IOUT ISY Offset Voltage Temperature Coefficient Input Bias Current Input Bias Current Offset Input Bias Current Temperature Coefficient Input Capacitance Open Loop Gain Power Supply Rejection Ratio (Note 4) Common Mode Rejection Ratio Common Mode Input Range Positive Output Voltage Swing Negative Output Voltage Swing Positive Output Voltage Swing Negative Output Voltage Swing Output Short Circuit Current (Note 5) Supply Current No load, RF = 1k No load, RF = 1k RL = 100, RF = 1k RL = 100, RF = 1k 140 10.2 at CMIR 80 65 70 -14.6 13.6 -10 4.5 -7 0.12 0.016 2.2 90 80 85 13.8 13.7 -13.8 11.2 -10.3 220 5 6 -9.5 -13.7 0.7 A A/C pF dB dB dB V V V V V mA mA AC PERFORMANCE - RG = 20, CL = 3pF BW BW 0.1dB BW 1dB Peaking SR OS -3dB Bandwidth, RL = 500 0.1dB Bandwidth, RL = 500 1dB Bandwidth, RL = 500 Peaking, RL = 500 Slew Rate (2.5V Square Wave, Measured 25%-75%) Overshoot, 4VP-P Output Square Wave Settling Time to 0.1% of 1V Pulse Positive Negative 130 135 26 60 2.1 150 1.6 -4.4 48 MHz MHz MHz dB V/S % % ns TS 4 FN7046.4 May 2, 2007 EL2126 Electrical Specifications Parameter VN IN HD2 HD3 NOTES: 4. Measured by moving the supplies from 13.5V to 16.5V 5. Pulse test only and using a 10 load 6. Frequency = 1MHz, VOUT = 2VP-P, into 500 and 5pF load VS+ = +15V, VS- = -15V, TA = 25C, RF = 180, RG = 20, RL = 500 unless otherwise specified. (Continued) Description Voltage Noise Spectral Density Current Noise Spectral Density 2nd Harmonic Distortion (Note 6) 3rd Harmonic Distortion (Note 6) Conditions Min Typ 1.4 1.1 -72 -73 Max Unit nV/Hz pA/Hz dBc dBc Typical Performance Curves 10 VS = 5V AV = 10 CL = 5pF RL = 500 RF = 1k RF = 500 10 VS = 15V AV = 10 CL = 5pF RL = 500 RF = 1k RF = 500 NORMALIZED GAIN (dB) 6 NORMALIZED GAIN (dB) 6 2 2 -2 RF = 180 -2 RF = 180 RF = 100 -6 RF = 100 -6 -10 1M 10M FREQUENCY (Hz) 100M -10 1M 10M FREQUENCY (Hz) 100M FIGURE 1. NON-INVERTING FREQUENCY RESPONSE FOR VARIOUS RF FIGURE 2. NON-INVERTING FREQUENCY RESPONSE FOR VARIOUS RF 8 VS = 5V AV = -10 CL = 5pF RL = 500 RF = 500 RF = 350 RF = 1k NORMALIZED GAIN (dB) 8 VS = 15V AV = -10 CL = 5pF RL = 500 RF = 1k RF = 500 RF = 350 NORMALIZED GAIN (dB) 4 4 0 RF = 200 RF = 100 -8 0 RF = 200 RF = 100 -8 -4 -4 -12 1M 10M FREQUENCY (Hz) 100M -12 1M 10M FREQUENCY (Hz) 100M FIGURE 3. INVERTING FREQUENCY RESPONSE FOR VARIOUS RF FIGURE 4. INVERTING FREQUENCY RESPONSE FOR VARIOUS RF 5 FN7046.4 May 2, 2007 EL2126 Typical Performance Curves (Continued) 10 VS = 5V RG = 20 RL = 500 CL = 5pF AV = 10 AV = 20 AV = 50 -6 10 VS = 15V RG = 20 RL = 500 CL = 5pF AV = 10 2 AV = 20 AV = 50 -6 NORMALIZED GAIN (dB) 6 NORMALIZED GAIN (dB) 6 2 -2 -2 -10 1M 10M FREQUENCY (Hz) 100M -10 1M 10M FREQUENCY (Hz) 100M FIGURE 5. NON-INVERTING FREQUENCY RESPONSE FOR VARIOUS GAIN FIGURE 6. NON-INVERTING FREQUENCY RESPONSE FOR VARIOUS GAIN 8 VS = 5V CL = 5pF RG = 35 8 VS = 15V CL = 5pF RG = 20 NORMALIZED GAIN (dB) NORMALIZED GAIN (dB) 4 4 0 AV = -10 AV = -50 0 AV = -10 -4 AV = -50 AV = -20 -4 AV = -20 -8 -8 -12 1M 10M FREQUENCY (Hz) 100M -12 1M 10M FREQUENCY (Hz) 100M FIGURE 7. INVERTING FREQUENCY RESPONSE FOR VARIOUS GAIN FIGURE 8. INVERTING FREQUENCY RESPONSE FOR VARIOUS RF 8 NORMALIZED GAIN (dB) VS = 5V CL = 5pF RL = 500 RF = 180 AV = 10 10 VS = 15V CL = 5pF RL = 500 RF = 180 AV = 10 VO = 30mVPP VO = 500mVPP VO = 1VPP NORMALIZED GAIN (dB) 4 6 0 VO = 500mVPP VO = 30mVPP 2 -4 VO = 5VPP VO = 2.5VPP VO = 1VPP 10M FREQUENCY (Hz) 100M -2 VO = 10VPP VO = 5VPP VO = 2.5VPP 10M FREQUENCY (Hz) 100M -8 -6 -12 1M -10 1M FIGURE 9. NON-INVERTING FREQUENCY RESPONSE FOR VARIOUS OUTPUT SIGNAL LEVELS FIGURE 10. NON-INVERTING FREQUENCY RESPONSE FOR VARIOUS OUTPUT SIGNAL LEVELS 6 FN7046.4 May 2, 2007 EL2126 Typical Performance Curves (Continued) 8 VS = 5V CL = 5pF RL = 500 RF = 350 AV = 10 VO = 500mVPP NORMALIZED GAIN (dB) VO = 1VPP VO = 30mVPP 4 8 VS = 15V CL = 5pF RL = 500 RF = 200 AV = 10 VO = 500mVPP VO = 1VPP VO = 30mVPP NORMALIZED GAIN (dB) 4 0 VO = 3.4VPP 0 VO = 3.4VPP -4 -4 -8 VO = 2.5VPP -8 VOVO=2.5VP = 2.5VPP -12 1M 10M FREQUENCY (Hz) 100M -12 1M 10M FREQUENCY (Hz) 100M FIGURE 11. INVERTING FREQUENCY RESPONSE FOR VARIOUS OUTPUT SIGNAL LEVELS FIGURE 12. INVERTING FREQUENCY RESPONSE FOR VARIOUS OUTPUT SIGNAL LEVELS 10 VS = 5V RF = 150 AV = 10 RL = 500 CL = 11pF 10 VS = 15V RF = 180 AV = 10 RL = 500 CL = 28pF CL = 16pF CL = 11pF NORMALIZED GAIN (dB) NORMALIZED GAIN (dB) 6 CL = 28pF CL = 16pF 6 2 2 CL = 5pF CL = 1.2pF -6 -2 CL = 5pF CL = 1pF -2 -6 -10 1M 10M FREQUENCY (Hz) 100M -10 1M 10M FREQUENCY (Hz) 100M FIGURE 13. NON-INVERTING FREQUENCY RESPONSE FOR VARIOUS CL FIGURE 14. NON-INVERTING FREQUENCY RESPONSE FOR VARIOUS CL 8 VS = 5V RF = 350 RL = 500 AV = -10 CL = 28pF NORMALIZED GAIN (dB) CL = 16pF 8 VS = 15V RF = 200 RL = 500 AV = -10 CL = 28pF CL = 16pF NORMALIZED GAIN (dB) 4 4 0 CL = 11pF -4 CL = 5pF CL = 1.2pF -8 0 CLCL=11p = 11pF -4 CL = 5pF CL = 1.2pF -8 -12 1M 10M FREQUENCY (Hz) 100M -12 1M 10M FREQUENCY (Hz) 100M FIGURE 15. INVERTING FREQUENCY RESPONSE FOR VARIOUS CL FIGURE 16. INVERTING FREQUENCY RESPONSE FOR VARIOUS CL 7 FN7046.4 May 2, 2007 EL2126 Typical Performance Curves (Continued) 100 GAIN SUPPLY CURRENT (mA) OPEN LOOP PHASE () OPEN LOOP GAIN (dB) 80 PHASE 60 50 150 250 0.6/DIV 40 -50 20 VS=5V 0 10k 100k -150 1M 10M 100M -250 1G 0 0 1.5/DIV SUPPLY VOLTAGE (V) FREQUENCY (Hz) FIGURE 17. OPEN LOOP GAIN AND OPEN LOOP PHASE FIGURE 18. SUPPLY CURRENT vs SUPPLY VOLTAGE 160 140 -3dB BANDWIDTH 120 100 80 60 40 20 0 0 2 4 6 8 VS (V) 10 12 AV = -50 AV = 50 14 16 AV = -20 AV = -20 VS = 5V RG = 20 RL = 500 CL = 5pF AV = -10 AV = 10 3.0 2.5 PEAKING (dB) 2.0 1.5 1.0 0.5 0 0 2 4 6 8 10 12 14 16 SUPPLY VOLTAGE (V) AV = -10 AV = 10 VS = 5V RG = 20 RL = 500 CL = 5pF FIGURE 19. BANDWIDTH vs Vs FIGURE 20. PEAKING vs Vs RF = 180 RG = 20 VS = 5V VO = 2VPP 0.5V/DIV 20mV/DIV RF = 180 RG = 20 VS = 5V VO = 100mVPP 10ns/DIV 10ns/DIV FIGURE 21. LARGE SIGNAL STEP RESPONSE FIGURE 22. SMALL SIGNAL STEP RESPONSE 8 FN7046.4 May 2, 2007 EL2126 Typical Performance Curves (Continued) -40 HARUMONIC DISTORTION (dBc) HARMONIC DISTORTION (dBc) -50 -60 -70 -80 3rd HD -90 -100 0 1 2 3 4 5 6 7 8 VOUT (VP-P) VS = 5V VO = 2VP-P RF = 180 AV = 10 RL = 500 -30 -40 -50 -60 -70 -80 -90 -100 0 5 10 15 20 25 VOUT (VP-P) 3rd HD VS = 5V VO = 2VP-P RF = 180 AV = 10 RL = 500 2nd HD 2nd HD FIGURE 23. 1MHz HARMONIC DISTORTION vs OUTPUT SWING FIGURE 24. 1MHz HARMONIC DISTORTION vs OUTPUT SWING -20 -30 -40 THD (dBc) -50 -60 -70 -80 -90 1k VS = 5V VO = 2VP-P IN (pA/Hz), VN (nV/Hz) 10 IN, VS = 5V VN, VS = 15V VN, VS = 5V 10k 100k 1M 10M 100M 1 10 IN, VS = 15V 100 1k FREQUENCY (Hz) 10k 100k FREQUENCY (Hz) FIGURE 25. TOTAL HARMONIC DISTORTION vs FREQUENCY FIGURE 26. NOISE vs FREQUENCY 70 60 SETTLING TIME (ns) 50 40 30 20 10 0 0.1 VS = 5 V ,V 16 VS = 5V RL = 500 AV = 10 8 VS = 15 V, V VS = 5V ,V O=5 VP -P VS = 15V ,V O=2 VP -P GROUP DELAY (ns) O=5 VP -P 12 4 AV = -10 O=2 VP -P 0 1.0 ACCURACY (%) 10.0 -4 1M 10M FREQUENCY (Hz) 100M 400M FIGURE 27. SETTLING TIME vs ACCURACY FIGURE 28. GROUP DELAY vs FREQUENCY 9 FN7046.4 May 2, 2007 EL2126 Typical Performance Curves (Continued) -10 110 VS=5V -30 CMRR (dB) PSRR (dB) 90 PSRR- -50 70 -70 50 PSRR+ -90 30 -110 10 100 1k 10k 100k 1M 10M 100M 10 10k 100k 1M 10M 200M FREQUENCY (Hz) FREQUENCY (Hz) FIGURE 29. CMRR vs FREQUENCY FIGURE 30. PSRR vs FREQUENCY CLOSED LOOP OUTPUT IMPEDANCE () 120 100 VS = 5V 100 10 BANDWIDTH (MHz) 80 60 40 PEAKING 20 0.01 10k 0 -40 BANDWIDTH VS = 5V 3.5 3 2.5 2 1.5 1 0.5 0 -0.5 0 40 80 120 160 TEMPERATURE (C) PEAKING (dB) 1 0.1 100k 1M FREQUENCY (Hz) 10M 100M FIGURE 31. CLOSED LOOP OUTPUT IMPEDANCE vs FREQUENCY FIGURE 32. BANDWIDTH AND PEAKING vs TEMPERATURE 220 200 SLEW RATE (V/s) 180 IS (mA) 160 140 120 100 80 60 -1 1 3 5 7 9 11 13 15 5VSR5VSR+ 15VSR+ 15VSR- 5.2 VS=15V 5.1 5 VS=5V 4.9 4.8 -50 0 50 100 150 VOUT SWING (VPP) DIE TEMPERATURE (C) FIGURE 33. SLEW RATE vs SWING FIGURE 34. SUPPLY CURRENT vs TEMPERATURE 10 FN7046.4 May 2, 2007 EL2126 Typical Performance Curves (Continued) 1 120 VS = 5V CMRR (dB) 0 VOS (mV) VS = 15V -1 110 VS = 5V 100 90 -2 -50 0 50 100 150 80 -50 0 50 100 150 DIE TEMPERATURE (C) DIE TEMPERATURE (C) FIGURE 35. OFFSET VOLTAGE vs TEMPERATURE FIGURE 36. CMRR vs TEMPERATURE 110 106 102 PSRR (dB) 98 94 90 VS = 15V 86 82 -50 VS = 5V VOUTH (V) 4.05 4 3.95 VS = 5V 3.9 3.85 0 50 100 150 3.8 -50 0 50 100 150 DIE TEMPERATURE (C) DIE TEMPERATURE (C) FIGURE 37. PSRR vs TEMPERATURE FIGURE 38. POSITIVE OUTPUT SWING vs TEMPERATURE 13.85 -3.9 -3.95 -4 13.8 VOUTH (V) 13.75 VOUTL (V) VS = 15V -4.05 -4.1 -4.15 VS = 5V 13.7 13.65 -4.2 13.6 -50 -4.25 -50 0 50 100 150 0 50 100 150 DIE TEMPERATURE (C) DIE TEMPERATURE (C) FIGURE 39. POSITIVE OUTPUT SWING vs TEMPERATURE FIGURE 40. NEGATIVE OUTPUT SWING vs TEMPERATURE 11 FN7046.4 May 2, 2007 EL2126 Typical Performance Curves (Continued) -13.76 102 100 SLEW RATE (V/s) -13.78 VOUTL (V) VS = 15V -13.8 98 96 94 92 90 -13.82 -50 88 -50 VS = 5V 0 50 100 150 0 50 100 150 DIE TEMPERATURE (C) DIE TEMPERATURE (C) FIGURE 41. NEGATIVE OUTPUT SWING vs TEMPERATURE FIGURE 42. SLEW RATE vs TEMPERATURE 155 3.52 150 VOUTH2 (V) SR (V/s) VS = 15V 145 3.5 VS = 5V 3.48 140 VO = 2VPP 0 50 100 150 3.46 135 -50 3.44 -50 0 50 100 150 DIE TEMPERATURE (C) DIE TEMPERATURE (C) FIGURE 43. SLEW RATE vs TEMPERATURE FIGURE 44. POSITIVE LOADED OUTPUT SWING vs TEMPERATURE 11.8 11.6 VS = 15V VOUTL2 (V) 11.4 SR (V/s) 11.2 11 10.8 10.6 -50 -3.35 -3.4 -3.45 -3.5 VS = 5V 3.55 0 50 100 150 -3.6 -50 0 50 100 150 DIE TEMPERATURE (C) DIE TEMPERATURE (C) FIGURE 45. POSITIVE LOADED OUTPUT SWING vs TEMPERATURE FIGURE 46. NEGATIVE LOADED OUTPUT SWING vs TEMPERATURE 12 FN7046.4 May 2, 2007 EL2126 Typical Performance Curves (Continued) -9.4 -9.6 -9.8 -10 -10.2 -10.4 -10.6 -50 VS=15V VOUTL2 (V) 0 50 Die Temperature (C) 100 150 FIGURE 47. NEGATIVE LOADED OUTPUT SWING vs TEMPERATURE JEDEC JESD51-3 LOW EFFECTIVE THERMAL CONDUCTIVITY TEST BOARD 1.2 POWER DISSIPATION (W) 1 781mW 0.8 0.6 0.4 0.2 0 0 25 50 75 85 100 125 150 AMBIENT Temperature (C) J A= +1 JEDEC JESD51-7 HIGH EFFECTIVE THERMAL CONDUCTIVITY TEST BOARD 1.8 1.6 POWER DISSIPATION (W) 1.4 1.2 1.136W 1 0.8 0.6 543mW 0.4 0.2 0 0 25 50 75 85 100 125 150 AMBIENT TEMPERATURE (C) J A= +1 SO 8 60 SO 8 488mW C /W SO T23 J -5 A=+ 256 C/W 10 C /W SOT 23-5 J A = +2 30C /W FIGURE 48. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE FIGURE 49. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE 13 FN7046.4 May 2, 2007 EL2126 Pin Descriptions EL2126CW (5 Ld SOT-23) 1 EL2126CS ( 8 Ld SOIC) 6 PIN NAME VOUT PIN FUNCTION Output EQUIVALENT CIRCUIT VS+ VOUT Circuit 1 2 3 4 3 VSVINA+ Supply Input VS+ VIN+ VIN- VSCircuit 2 4 5 2 7 VINAVS+ Input Supply Reference Circuit 2 14 FN7046.4 May 2, 2007 EL2126 Applications Information Product Description The EL2126 is an ultra-low noise, wideband monolithic operational amplifier built on Elantec's proprietary high speed complementary bipolar process. It features 1.3nV/Hz input voltage noise, 200V typical offset voltage, and 73dB THD. It is intended for use in systems such as ultrasound imaging where very small signals are needed to be amplified. The EL2126 also has excellent DC specifications: 200V VOS, 22A IB, 0.4A IOS, and 106dB CMRR. These specifications allow the EL2126 to be used in DC-sensitive applications such as difference amplifiers. Noise Calculations The primary application for the EL2126 is to amplify very small signals. To maintain the proper signal-to-noise ratio, it is essential to minimize noise contribution from the amplifier. Figure 51 shows all the noise sources for all the components around the amplifier. VIN R3 VR3 IN+ VR1 VN + R1 VON IN- VR2 R2 Gain-Bandwidth Product The EL2126 has a gain-bandwidth product of 650MHz at 5V. For gains less than 20, higher-order poles in the amplifier's transfer function contribute to even higher closedloop bandwidths. For example, the EL2126 has a -3dB bandwidth of 100MHz at a gain of 10 and decreases to 33MHz at gain of 20. It is important to note that the extra bandwidth at lower gain does not come at the expenses of stability. Even though the EL2126 is designed for gain 10. With external compensation, the device can also operate at lower gain settings. The RC network shown in Figure 50 reduces the feedback gain at high frequency and thus maintains the amplifier stability. R values must be less than RF divided by 9 and 1 divided by 2RC must be less than 200MHz. RF R C VIN + VOUT FIGURE 51. VN is the amplifier input voltage noise IN+ is the amplifier positive input current noise IN- is the amplifier negative input current noise VRX is the thermal noise associated with each resistor: V RX = 4kTRx (EQ. 1) where: k is Boltzmann's constant = 1.380658 x 10-23 T is temperature in degrees Kelvin (273 + C) The total noise due to the amplifier seen at the output of the amplifier can be calculated by using the Equation 2. As the equation shows, to keep noise at a minimum, small resistor values should be used. At higher amplifier gain configuration where R2 is reduced, the noise due to IN-, R2, and R1 decreases and the noise caused by IN+, VN, and R3 starts to dominate. Because noise is summed in a rootmean-squares method, noise sources smaller than 25% of the largest noise source can be ignored. This can greatly simplify the formula and make noise calculation much easier to calculate. FIGURE 50. Choice of Feedback Resistor, RF The feedback resistor forms a pole with the input capacitance. As this pole becomes larger, phase margin is reduced. This increases ringing in the time domain and peaking in the frequency domain. Therefore, RF has some maximum value which should not be exceeded for optimum performance. If a large value of RF must be used, a small capacitor in the few pF range in parallel with RF can help to reduce this ringing and peaking at the expense of reducing the bandwidth. Frequency response curves for various RF values are shown in the typical performance curves section of this data sheet. V ON = R 1 2 R 1 2 R 1 2 R 1 2 2 2 2 2 2 BW x VN x 1 + ------ + IN- x R 1 + IN+ x R 3 x 1 + ------ + 4 x K x T x R 1 + 4 x K x T x R 2 x ------ + 4 x K x T x R 3 x 1 + ------ R 2 R 2 R 2 R 2 (EQ. 2) 15 FN7046.4 May 2, 2007 EL2126 Output Drive Capability The EL2126 is designed to drive low impedance load. It can easily drive 6VP-P signal into a 100 load. This high output drive capability makes the EL2126 an ideal choice for RF, IF, and video applications. Furthermore, the EL2126 is current-limited at the output, allowing it to withstand momentary short to ground. However, the power dissipation with output-shorted cannot exceed the power dissipation capability of the package. with 0.1F ceramic capacitor has been proven to work well when placed at each supply pin. For single supply operation, where pin 4 (VS-) is connected to the ground plane, a single 4.7F tantalum capacitor in parallel with a 0.1F ceramic capacitor across pins 7 (VS+) and pin 4 (VS-) will suffice. For good AC performance, parasitic capacitance should be kept to a minimum. Ground plane construction again should be used. Small chip resistors are recommended to minimize series inductance. Use of sockets should be avoided since they add parasitic inductance and capacitance which will result in additional peaking and overshoot. Driving Cables and Capacitive Loads Although the EL2126 is designed to drive low impedance load, capacitive loads will decreases the amplifier's phase margin. As shown in the performance curves, capacitive load can result in peaking, overshoot and possible oscillation. For optimum AC performance, capacitive loads should be reduced as much as possible or isolated with a series resistor between 5 to 20. When driving coaxial cables, double termination is always recommended for reflection-free performance. When properly terminated, the capacitance of the coaxial cable will not add to the capacitive load seen by the amplifier. Supply Voltage Range and Single Supply Operation The EL2126 has been designed to operate with supply voltage range of 2.5V to 15V. With a single supply, the EL2126 will operate from +5V to +30V. Pins 4 and 7 are the power supply pins. The positive power supply is connected to pin 7. When used in single supply mode, pin 4 is connected to ground. When used in dual supply mode, the negative power supply is connected to pin 4. As the power supply voltage decreases from +30V to +5V, it becomes necessary to pay special attention to the input voltage range. The EL2126 has an input voltage range of 0.4V from the negative supply to 1.2V from the positive supply. So, for example, on a single +5V supply, the EL2126 has an input voltage range which spans from 0.4V to 3.8V. The output range of the EL2126 is also quite large, on a +5V supply, it swings from 0.4V to 3.8V. Power Supply Bypassing And Printed Circuit Board Layout As with any high frequency devices, good printed circuit board layout is essential for optimum performance. Ground plane construction is highly recommended. Lead lengths should be kept as short as possible. The power supply pins must be closely bypassed to reduce the risk of oscillation. The combination of a 4.7F tantalum capacitor in parallel 16 FN7046.4 May 2, 2007 EL2126 Small Outline Package Family (SO) A D N (N/2)+1 h X 45 A E E1 PIN #1 I.D. MARK c SEE DETAIL "X" 1 B (N/2) L1 0.010 M C A B e C H A2 GAUGE PLANE A1 0.004 C 0.010 M C A B b DETAIL X SEATING PLANE L 4 4 0.010 MDP0027 SMALL OUTLINE PACKAGE FAMILY (SO) INCHES SYMBOL A A1 A2 b c D E E1 e L L1 h N NOTES: 1. Plastic or metal protrusions of 0.006" maximum per side are not included. 2. Plastic interlead protrusions of 0.010" maximum per side are not included. 3. Dimensions "D" and "E1" are measured at Datum Plane "H". 4. Dimensioning and tolerancing per ASME Y14.5M-1994 SO-8 0.068 0.006 0.057 0.017 0.009 0.193 0.236 0.154 0.050 0.025 0.041 0.013 8 SO-14 0.068 0.006 0.057 0.017 0.009 0.341 0.236 0.154 0.050 0.025 0.041 0.013 14 SO16 (0.150") 0.068 0.006 0.057 0.017 0.009 0.390 0.236 0.154 0.050 0.025 0.041 0.013 16 SO16 (0.300") (SOL-16) 0.104 0.007 0.092 0.017 0.011 0.406 0.406 0.295 0.050 0.030 0.056 0.020 16 SO20 (SOL-20) 0.104 0.007 0.092 0.017 0.011 0.504 0.406 0.295 0.050 0.030 0.056 0.020 20 SO24 (SOL-24) 0.104 0.007 0.092 0.017 0.011 0.606 0.406 0.295 0.050 0.030 0.056 0.020 24 SO28 (SOL-28) 0.104 0.007 0.092 0.017 0.011 0.704 0.406 0.295 0.050 0.030 0.056 0.020 28 TOLERANCE MAX 0.003 0.002 0.003 0.001 0.004 0.008 0.004 Basic 0.009 Basic Reference Reference NOTES 1, 3 2, 3 Rev. M 2/07 17 FN7046.4 May 2, 2007 EL2126 Small Outline Transistor Plastic Packages (SOT23-5) D P5.064 VIEW C e1 5 LEAD SMALL OUTLINE TRANSISTOR PLASTIC PACKAGE INCHES MILLIMETERS MIN 0.90 0.00 0.90 0.30 0.30 0.08 0.08 2.80 2.60 1.50 MAX 1.45 0.15 1.30 0.50 0.45 0.22 0.20 3.00 3.00 1.70 6 6 3 3 4 NOTES - 5 E 1 2 3 4 C L C L E1 SYMBOL A A1 A2 b b1 MIN 0.036 0.000 0.036 0.012 0.012 0.003 0.003 0.111 0.103 0.060 MAX 0.057 0.0059 0.051 0.020 0.018 0.009 0.008 0.118 0.118 0.067 e C L 0.20 (0.008) M C L C b C c c1 D E E1 A A2 A1 SEATING PLANE -C- e e1 L L1 0.0374 Ref 0.0748 Ref 0.014 0.022 0.95 Ref 1.90 Ref 0.35 0.55 0.024 Ref. 0.010 Ref. 5 0.004 0.004 0o 0.010 8o 0.60 Ref. 0.25 Ref. 5 0.10 0.10 0o 0.25 8o Rev. 2 9/03 5 0.10 (0.004) C L2 N WITH PLATING c b b1 c1 R R1 NOTES: BASE METAL 1. Dimensioning and tolerance per ASME Y14.5M-1994. 4X 1 R1 R GAUGE PLANE SEATING PLANE C L1 4X 1 VIEW C L 2. Package conforms to EIAJ SC-74 and JEDEC MO178AA. 3. Dimensions D and E1 are exclusive of mold flash, protrusions, or gate burrs. 4. Footlength L measured at reference to gauge plane. 5. "N" is the number of terminal positions. 6. These Dimensions apply to the flat section of the lead between 0.08mm and 0.15mm from the lead tip. 7. Controlling dimension: MILLIMETER. Converted inch dimensions are for reference only. L2 18 FN7046.4 May 2, 2007 EL2126 SOT-23 Package Family e1 A N 6 4 MDP0038 D SOT-23 PACKAGE FAMILY MILLIMETERS SYMBOL A A1 SOT23-5 1.45 0.10 1.14 0.40 0.14 2.90 2.80 1.60 0.95 1.90 0.45 0.60 5 SOT23-6 1.45 0.10 1.14 0.40 0.14 2.90 2.80 1.60 0.95 1.90 0.45 0.60 6 TOLERANCE MAX 0.05 0.15 0.05 0.06 Basic Basic Basic Basic Basic 0.10 Reference Reference Rev. F 2/07 NOTES: 1. Plastic or metal protrusions of 0.25mm maximum per side are not included. 2. Plastic interlead protrusions of 0.25mm maximum per side are not included. 3. This dimension is measured at Datum Plane "H". 4. Dimensioning and tolerancing per ASME Y14.5M-1994. 5. Index area - Pin #1 I.D. will be located within the indicated zone (SOT23-6 only). E1 2 3 E A2 b 0.15 C D 2X 5 e B b NX 1 2 3 0.20 C 2X 0.20 M C A-B D c D E E1 e e1 L L1 0.15 C A-B 2X C D 1 3 N A2 SEATING PLANE A1 0.10 C NX (L1) H 6. SOT23-5 version has no center lead (shown as a dashed line). A GAUGE PLANE c L 0 +3 -0 0.25 All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation's quality certifications can be viewed at www.intersil.com/design/quality Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 19 FN7046.4 May 2, 2007 |
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