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Final Electrical Specifications
LT1352/LT1353 Dual and Quad 250A, 3MHz, 200V/s Op Amps
January 1996
FEATURES
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DESCRIPTION
The LT (R)1352/LT1353 are dual and quad, very low power, high speed operational amplifiers with outstanding AC and DC performance. The amplifiers feature much lower supply current and higher slew rate than devices with comparable bandwidth. The circuit combines the slewing performance of a current feedback amplifier in a true operational amplifier with matched high impedance inputs. The high slew rate ensures that the large signal bandwidth is not degraded. Each output is capable of driving a 1k load to 13V with 15V supplies and a 500 load to 3.4V on 5V supplies. The LT1352/LT1353 are members of a family of fast, high performance amplifiers using this unique topology and employing Linear Technology Corporation's advanced bipolar complementary processing. For higher bandwidth devices with higher supply current see the LT1354 through LT1365 data sheets. Bandwidths of 12MHz, 25MHz, 50MHz and 70MHz are available with 1mA, 2mA, 4mA and 6mA of supply current per amplifier. Singles, duals and quads of each amplifier are available.
, LTC and LT are registered trademarks of Linear Technology Corporation. C-Load is a trademark of Linear Technology Corporation.
3MHz Gain Bandwidth 200V/s Slew Rate 250A Supply Current per Amplifier C-LoadTM Op Amp Drives All Capacitive Loads Unity-Gain Stable Maximum Input Offset Voltage: 600V Maximum Input Bias Current: 50nA Maximum Input Offset Current: 15nA Minimum DC Gain, RL = 2k: 30V/mV Input Noise Voltage: 14nV/Hz Settling Time to 0.1%, 10V Step: 700ns Settling Time to 0.01%, 10V Step: 1.25s Minimum Output Swing into 1k: 13V Minimum Output Swing into 500: 3.4V Specified at 2.5V, 5V and 15V
APPLICATIONS
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Battery-Powered Systems Wideband Amplifiers Buffers Active Filters Data Acquisition Systems Photodiode Amplifiers
TYPICAL APPLICATION
Instrumentation Amplifier
R5 1.1k R1 50k R2 5k R4 50k
-
1/2 LT1352
R3 5k
-
1/2 LT1352 VOUT
-
VIN
+
+
AV = -1
1352/53 TA02
+
GAIN = [R4/R2][1 + (1/2)(R2/R1 + R3/R4) + (R2 + R3)/R5] = 102 TRIM R5 FOR GAIN TRIM R1 FOR COMMON MODE REJECTION BW = 30kHz
1352/53 TA01
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.
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Large-Signal Response
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LT1352/LT1353
ABSOLUTE MAXIMUM RATINGS
Total Supply Voltage (V + to V -) .............................. 36V Differential Input Voltage ....................................... 10V Input Voltage .......................................................... VS Output Short-Circuit Duration (Note 1) ........... Indefinite Operating Temperature Range LT1352C/LT1353C ............................. - 40C to 85C Specified Temperature Range LT1352C/LT1353C ............................ - 40C to 85C Maximum Junction Temperature (See Below) Plastic Package ............................................... 150C Storage Temperature Range ................. - 65C to 150C Lead Temperature (Soldering, 10 sec).................. 300C
PACKAGE/ORDER INFORMATION
TOP VIEW OUT A 1 -IN A 2 +IN A 3 V- 4 B A 6 5 -IN B +IN B 8 7 V+ OUT B
ORDER PART NUMBER LT1352CN8 LT1352CS8 S8 PART MARKING 1352
N8 PACKAGE 8-LEAD PDIP S8 PACKAGE 8-LEAD PLASTIC SO
TJMAX = 150C, JA = 130C/ W (N8) TJMAX = 150C, JA = 190C/ W (S8)
Consult factory for Industrial and Military grade parts.
ELECTRICAL CHARACTERISTICS
SYMBOL VOS PARAMETER Input Offset Voltage
TA = 25C, VCM = 0V unless otherwise noted.
VSUPPLY 15V 5V 2.5V 2.5V to 15V 2.5V to 15V MIN TYP 0.2 0.2 0.3 5 15 14 0.5 300 600 20 3 12.0 2.5 0.5 13.5 3.5 1.0 - 13.5 - 3.5 - 1.0 - 12.0 - 2.5 - 0.5 MAX 0.6 0.6 0.8 15 50 UNITS mV mV mV nA nA nV/Hz pA/Hz M M pF V V V V V V
CONDITIONS
IOS IB en in RIN CIN
Input Offset Current Input Bias Current Input Noise Voltage Input Noise Current Input Resistance Input Capacitance Positive Input Voltage Range f = 10kHz f = 10kHz VCM = 12V Differential
Negative Input Voltage Range
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TOP VIEW OUT A 1 -IN A 2 +IN A 3 V+ 4 B C A D 14 OUT D 13 -IN D 12 +IN D 11 V - 10 +IN C 9 -IN C 8 OUT C
ORDER PART NUMBER LT1353CS
+IN B 5 -IN B 6 OUT B 7
S PACKAGE 14-LEAD PLASTIC SO
TJMAX = 150C, JA = 150C/ W
2.5V to 15V 2.5V to 15V 15V 15V 15V 15V 5V 2.5V 15V 5V 2.5V
LT1352/LT1353
ELECTRICAL CHARACTERISTICS
SYMBOL CMRR PARAMETER Common Mode Rejection Ratio
TA = 25C, VCM = 0V unless otherwise noted.
VSUPPLY 15V 5V 2.5V 15V 15V 15V 5V 5V 5V 2.5V 15V 15V 15V 5V 5V 2.5V 15V 5V 15V 15V 5V 15V 5V 15V 5V 2.5V 15V 5V 15V 5V 15V 5V 15V 15V 5V 5V 15V 15V 15V 5V 101 2.0 1.8 MIN 80 78 68 90 40 30 20 30 25 15 20 13.5 13.4 13.0 3.5 3.4 1.3 13.0 6.8 30 120 30 TYP 94 86 77 106 80 60 40 60 50 30 40 14.0 13.8 13.4 4.0 3.8 1.7 13.4 7.6 44 200 50 3.2 2.6 3.0 2.7 2.5 46 53 13 16 41 52 700 1250 950 1400 1.5 120 250 230 320 300 MAX UNITS dB dB dB dB V/mV V/mV V/mV V/mV V/mV V/mV V/mV V V V V V V mA mA mA V/s V/s MHz MHz MHz MHz MHz ns ns % % ns ns ns ns ns ns dB A A
CONDITIONS VCM = 12V VCM = 2.5V VCM = 0.5V VS = 2.5V to 15V VOUT = 12V, RL = 5k VOUT = 10V, RL = 2k VOUT = 10V, RL = 1k VOUT = 2.5V, RL = 5k VOUT = 2 .5V, RL = 2k VOUT = 2.5V, RL = 1k VOUT = 1V, RL = 5k RL = 5k, VIN = 10mV RL = 2k, VIN = 10mV RL = 1k, VIN = 10mV RL = 1k, VIN = 10mV RL= 500, VIN = 10mV RL = 5k, VIN = 10mV VOUT = 13V VOUT = 3.4V VOUT = 0V, VIN = 3V AV = - 1, RL = 5k (Note 2) 10V Peak (Note 3) 3V Peak (Note 3) f = 200kHz, RL = 10k
PSRR AVOL
Power Supply Rejection Ratio Large-Signal Voltage Gain
VOUT
Output Swing
IOUT ISC SR
Output Current Short-Circuit Current Slew Rate Full-Power Bandwidth
GBW
Gain Bandwidth
tr, tf
Rise Time, Fall Time Overshoot Propagation Delay
AV = 1, 10% to 90%, 0.1V AV = 1, 0.1V AV = 1, 50% VIN to 50% VOUT, 0.1V 10V Step, 0.1%, AV = - 1 10V Step, 0.01%, AV = - 1 5V Step, 0.1%, AV = - 1 5V Step, 0.01%, AV = - 1 AV = 1, f = 20kHz VOUT = 10V, RL = 2k Each Amplifier
ts
Settling Time
RO IS
Output Resistance Channel Separation Supply Current
3
LT1352/LT1353
ELECTRICAL CHARACTERISTICS
SYMBOL VOS PARAMETER Input Offset Voltage
0C TA 70C, VCM = 0V unless otherwise noted.
VSUPPLY 15V 5V 2.5V MIN TYP MAX 0.8 0.8 1.0 3 8 20 75 79 77 67 89 15V 15V 15V 5V 5V 5V 2.5V 15V 15V 15V 5V 5V 2.5V 15V 5V 15V 15V 5V 15V 5V 15V 15V 5V 25 20 15 20 15 10 15 13.4 13.3 12.0 3.4 3.3 1.2 12.0 6.6 24 100 21 1.8 1.6 100 350 330 UNITS mV mV mV V/C nA nA dB dB dB dB V/mV V/mV V/mV V/mV V/mV V/mV V/mV V V V V V V mA mA mA V/s V/s MHz MHz dB A A
CONDITIONS
Input VOS Drift IOS IB CMRR Input Offset Current Input Bias Current Common Mode Rejection Ratio
(Note 4)
2.5V to 15V 2.5V to 15V 2.5V to 15V
VCM = 12V VCM = 2.5V VCM = 0.5V VS = 2.5V to 15V VOUT = 12V, RL = 5k VOUT = 10V, RL = 2k VOUT = 10V, RL = 1k VOUT = 2.5V, RL = 5k VOUT = 2 .5V, RL = 2k VOUT = 2.5V, RL = 1k VOUT = 1V, RL = 5k RL = 5k, VIN = 10mV RL = 2k, VIN = 10mV RL = 1k, VIN = 10mV RL = 1k, VIN = 10mV RL= 500, VIN = 10mV RL = 5k, VIN = 10mV VOUT = 12V VOUT = 3.3V VOUT = 0V, VIN = 3V AV = - 1, RL = 5k (Note 2) f = 200kHz, RL = 10k VOUT = 10V, RL = 2k Each Amplifier
15V 5V 2.5V
PSRR AVOL
Power Supply Rejection Ratio Large-Signal Voltage Gain
VOUT
Output Swing
IOUT ISC SR GBW
Output Current Short-Circuit Current Slew Rate Gain Bandwidth Channel Separation
IS
Supply Current
- 40C TA 85C, VCM = 0V unless otherwise noted. (Note 5)
SYMBOL VOS PARAMETER Input Offset Voltage CONDITIONS VSUPPLY 15V 5V 2.5V (Note 4) 2.5V to 15V 2.5V to 15V 2.5V to 15V VCM = 12V VCM = 2.5V VCM = 0.5V VS = 2.5V to 15V 15V 5V 2.5V 77 76 66 88 3 MIN TYP MAX 1.0 1.0 1.2 8 30 100 UNITS mV mV mV V/C nA nA dB dB dB dB
Input VOS Drift IOS IB CMRR Input Offset Current Input Bias Current Common Mode Rejection Ratio
PSRR
Power Supply Rejection Ratio
4
LT1352/LT1353
ELECTRICAL CHARACTERISTICS
SYMBOL AVOL PARAMETER Large-Signal Voltage Gain
- 40C TA 85C, VCM = 0V unless otherwise noted. (Note 5)
VSUPPLY 15V 15V 5V 5V 5V 2.5V 15V 15V 15V 5V 5V 2.5V 15V 5V 15V 15V 5V 15V 5V 15V 15V 5V MIN 20 15 15 10 8 10 13.3 13.2 10.0 3.3 3.2 1.1 10.0 6.4 20 50 15 1.6 1.4 99 380 350 TYP MAX UNITS V/mV V/mV V/mV V/mV V/mV V/mV V V V V V V mA mA mA V/s V/s MHz MHz dB A A
CONDITIONS VOUT = 12V, RL = 5k VOUT = 10V, RL = 2k VOUT = 2.5V, RL = 5k VOUT = 2 .5V, RL = 2k VOUT = 2.5V, RL = 1k VOUT = 1V, RL = 5k RL = 5k, VIN = 10mV RL = 2k, VIN = 10mV RL = 1k, VIN = 10mV RL = 1k, VIN = 10mV RL= 500, VIN = 10mV RL = 5k, VIN = 10mV VOUT = 10V VOUT = 3.2V VOUT = 0V, VIN = 3V AV = - 1, RL = 5k (Note 2) f = 200kHz, RL = 10k VOUT = 10V, RL = 2k Each Amplifier
VOUT
Output Swing
IOUT ISC SR GBW
Output Current Short-Circuit Current Slew Rate Gain Bandwidth Channel Separation
IS
Supply Current
Note 1: A heat sink may be required to keep the junction temperature below absolute maximum when the output is shorted indefinitely. Note 2: Slew rate is measured between 8V on the output with 12V input for 15V supplies and 2V on the output with 3V input for 5V supplies.
Note 3: Full-power bandwidth is calculated: FPBW = (Slew Rate)/2VP. Note 4: This parameter is not 100% tested. Note 5: The LT1352/LT1353 are not tested and are not quality assurance sampled at - 40C and at 85C. These specifications are guaranteed by design, correlation and/or inference from 0C, 25C and/or 70C tests.
SI PLIFIED SCHE ATIC
V+ R2 Q10 Q11 Q12 Q20 R3 Q21
-IN
Q5
Q6 Q8 Q4
V-
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C1 R6
Q9 Q7 R1 Q3 1k Q2 Q17 Q1 +IN Q18 R7 Q13 CT Q15 RC CC
Q19
OUTPUT
Q22 C2
Q14
Q16
Q23 R4
Q24 R5
1352/53 SS
5
LT1352/LT1353
APPLICATIONS INFORMATION
Layout and Passive Components The LT1352/LT1353 amplifiers are easy to use and tolerant of less than ideal layouts. For maximum performance (for example, fast 0.01% settling) use a ground plane, short lead lengths and RF-quality bypass capacitors (0.01F to 0.1F). For high drive current applications use low ESR bypass capacitors (1F to 10F tantalum). The parallel combination of the feedback resistor and gain setting resistor on the inverting input combine with the input capacitance to form a pole which can cause peaking or even oscillations. If feedback resistors greater than 10k are used, a parallel capacitor of value, CF > (RG)(CIN/RF), should be used to cancel the input pole and optimize dynamic performance. For unity-gain applications such as current-to-voltage converter where a large feedback resistor is used, CF should be greater than or equal to CIN. Capacitive Loading The LT1352/LT1353 are stable with any capacitive load. As the capacitive load increases, both the bandwidth and phase margin decrease so there will be peaking in the frequency domain and in the transient response. Circuit Operation The LT1352/LT1353 circuit topology is a true voltage feedback amplifier that has the slewing behavior of a current feedback amplifier. The operation of the circuit can be understood by referring to the Simplified Schematic. The inputs are buffered by complementary NPN and PNP emitter followers which drive a 1k resistor. The input voltage appears across the resistor generating currents which are mirrored into the high impedance node and compensation capacitor CT. Complementary followers form an output stage which buffers the gain node from the load. The output devices Q19 and Q22 are connected to form a composite PNP and a composite NPN. Capacitive load compensation is provided by RC and CC. The bandwidth is set by the input resistor and the capacitance on the high impedance node. The slew rate is determined by the current available to charge the gain node capacitance. This current is the differential input voltage divided by R1, so the slew rate is proportional to the input. Highest slew rates are therefore seen in the lowest gain configurations. For example, a 10V output step in a gain of 10 has only a 1V input step whereas the same output step in unity-gain has a 10 times greater input step. In higher gain configurations the large-signal performance becomes the same as the small-signal performance with both responses looking like a 1-pole lowpass filter. Power Dissipation The LT1352/LT1353 combine high speed and large output drive in small packages. Because of the wide supply voltage range, it is possible to exceed the maximum junction temperature of 150C under certain conditions. Maximum junction temperature TJ is calculated from the ambient temperature TA and power dissipation PD as follows: LT1352CN8: TJ = TA + (PD)(130C/W) LT1352CS8: TJ = TA + (PD)(190C/W) LT1353CS: TJ = TA + (PD)(150C/W) Worst-case power dissipation occurs at the maximum supply current and when the output voltage is at 1/2 of either supply voltage (or the maximum swing if less than 1/2 supply voltage). For each amplifier PD(MAX) is: PD(MAX) = (V + - V -)(IS(MAX)) + (V +/2)2/RL Example: LT1353 in S14 at 85C, VS = 15V, RL = 500, VOUT = 2.5V (5mA) PD(MAX) = (30V)(380A) + (15V - 2.5V)(5mA) = 74mW TJ = 85C + (4)(74mW)(150C/W) = 129C
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LT1352/LT1353
TYPICAL APPLICATIONS
DAC Current-to-Voltage Converter
DAC INPUTS
V VOS + IOS (5k) + OUT < 0.5LSB AVOL
4.64k VIN
1/2 LT1352 10nF
-
+
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10pF 12 5k
-
1/2 LT1352 VOUT
565A TYPE
+
1352/53 TA03
20kHz, 4th Order Butterworth Filter
4.64k 470pF 5.49k 220pF 13.3k
-
1/2 LT1352
5.49k
11.3k
2200pF
-
1/2 LT1352 VOUT
+
4700pF
+
1352/53 TA04
400kHz Photodiode Preamp with 10kHz Highpass Loop
1N5712
10k
-
BPV22NF 1.5k 1/2 LT1352 VOUT 10k
+
10nF
10k
1352/53 TA05
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LT1352/LT1353
PACKAGE DESCRIPTION Dimension in inches (millimeters) unless otherwise noted.
N8 Package 8-Lead PDIP (Narrow 0.300)
(LTC DWG # 05-08-1510)
0.300 - 0.325 (7.620 - 8.255) 0.045 - 0.065 (1.143 - 1.651) 0.130 0.005 (3.302 0.127) 0.400* (10.160) MAX 8 7 6 5
0.009 - 0.015 (0.229 - 0.381)
0.065 (1.651) TYP 0.005 (0.127) MIN 0.100 0.010 (2.540 0.254) 0.125 (3.175) MIN 0.018 0.003 (0.457 0.076) 0.015 (0.380) MIN
(
+0.025 0.325 -0.015 +0.635 8.255 -0.381
)
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
0.010 - 0.020 x 45 (0.254 - 0.508) 0.008 - 0.010 (0.203 - 0.254) 0- 8 TYP
0.016 - 0.050 0.406 - 1.270
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE **DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE **DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
0.010 - 0.020 x 45 (0.254 - 0.508) 0.008 - 0.010 (0.203 - 0.254) 0 - 8 TYP
0.016 - 0.050 0.406 - 1.270
RELATED PARTS
PART NUMBER LT1354 LT1355/LT1356 DESCRIPTION 12MHz, 400V/s Op Amp Dual/Quad 12MHz, 400V/s Op Amps COMMENTS High Slew Rate, Wide Bandwidth, C-Load Drive, Low Power High Slew Rate, Wide Bandwidth, 1.2mA Max Supply Current per Op Amp, C-Load Drive
LT/GP 0196 6K * PRINTED IN USA
8
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 q FAX: (408) 434-0507 q TELEX: 499-3977
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0.255 0.015* (6.477 0.381)
1
2
3
4
N8 0695
S8 Package 8-Lead Plastic Small Outline (Narrow 0.150)
(LTC DWG # 05-08-1610)
0.053 - 0.069 (1.346 - 1.752) 8 0.004 - 0.010 (0.101 - 0.254) 0.228 - 0.244 (5.791 - 6.197)
0.189 - 0.197* (4.801 - 5.004) 7 6 5
0.014 - 0.019 (0.355 - 0.483)
0.050 (1.270) BSC
0.150 - 0.157** (3.810 - 3.988)
1
2
3
4
SO8 0695
S Package 14-Lead Plastic Small Outline (Narrow 0.150)
(LTC DWG # 05-08-1610)
0.337 - 0.344* (8.560 - 8.738) 14 13 12 11 10 9 8
0.228 - 0.244 (5.791 - 6.197)
0.150 - 0.157** (3.810 - 3.988)
1 0.053 - 0.069 (1.346 - 1.752)
2
3
4
5
6
7
0.004 - 0.010 (0.101 - 0.254)
0.014 - 0.019 (0.355 - 0.483)
0.050 (1.270) TYP
S14 0695
(c) LINEAR TECHNOLOGY CORPORATION 1996

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