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LT1022 High Speed, Precision JFET Input Operational Amplifier
FEATURES

DESCRIPTIO

Guaranteed Slew Rate: 23V/s Min Guaranteed Offset Voltage: 250V Max - 55C to 125C: 750V Max Guaranteed Drift: 5V/C Max Guaranteed Bias Current: 70C, 180pA Max 125C, 4nA Max Gain-Bandwidth Product: 8.5MHz Typ Settling Time to 0.05% (10V Step): 0.9s Typ
The LT(R)1022 JFET input operational amplifier combines high speed and precision performance. A 26V/s slew rate and 8.5MHz gain-bandwidth product are simultaneously achieved with offset voltage of typically 80V, 1.5V/C drift, bias currents of 50pA at 70C, 500pA at 125C. The output delivers 20mA of load current without gain degradation. The 250V maximum offset voltage specification represents less than 1/2 least significant bit error in a 14-bit, 10V system. The LT1022A meets or exceeds all OP-16A and OP-16E specifications. It is faster and more accurate without stability problems at cold temperatures. The LT1022 can be used as the output amplifier for 12-bit current output D/A converters, as shown below. For a more accurate, lower power dissipation, but slower JFET input op amp, please refer to the LT1055 data sheet.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S

Fast D/A Output Amplifiers (12, 14, 16 Bits) High Speed Instrumentation Fast, Precision Sample and Hold Voltage-to-Frequency Converters Logarithmic Amplifiers
TYPICAL APPLICATIO
12-Bit Voltage Output D/A Converter
CF 2 0mA TO 2mA OR 4mA 3 12-BIT CURRENT OUTPUT D/A CONVERTER (e.g., 6012, 565 OR DAC-80) 15V
Large-Signal Response
LT1022
6
OUTPUT 0V TO 10V
+
4 -15V
5V/DIV
-
7
CF = 15pF TO 33pF SETTLING TIME TO 2mV (0.8 LSB) = 1.5s TO 2s
LT1022 * TA01
AV = 1 CL = 100pF TA = 25C VS = 15V
U
0.5s/DIV
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U
U
1
LT1022
ABSOLUTE
(Note 1)
AXI U
RATI GS
Operating Temperature Range LT1022AM/1022M (OBSOLETE).........-55C to 125C LT1022AC/1022C .................................... 0C to 70C Storage Temperature Range .................. -65C to 150C Lead Temperature (Soldering, 10 sec.)................. 300C
Supply Voltage ...................................................... 20V Differential Input Voltage ....................................... 40V Input Voltage ......................................................... 20V Output Short Circuit Duration .......................... Indefinite
PACKAGE/ORDER I FOR ATIO
TOP VIEW N/C BALANCE 1 -IN 2 +IN 3 4 V- 8 + 7V 6 OUT 5 BALANCE
ORDER PART NUMBER LT1022AMH LT1022MH LT1022ACH LT1022CH
METAL CAN H PACKAGE TJMAX = 150 C, JA = 150C/W, JC = 45 C/W
OBSOLETE PACKAGE
Consider the N8 Package as an Alternate Source
LT1022 * POI01
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER VOS lOS IB Input Offset Voltage (Note 2) Input Offset Current Input Bias Current Input Resistance--Differential --Common Mode Input Capacitance en en in AVOL Input Noise Voltage Input Noise Voltage Density Input Noise Current Density Large Signal Voltage Gain Input Voltage Range CMRR PSRR VOUT SR Common-Mode Rejection Ratio Power Supply Rejection Ratio Output Voltage Swing Slew Rate VCM = 10.5V 0.1Hz to 10Hz CONDITIONS H Package N8 Package Fully Warmed Up Fully Warmed Up VCM = +10V
VS = 15V, TA = 25C, VCM = 0V unless otherwise noted.
LT1022AM LT1022AC TYP MAX 80 2 10 30 1012 1012 1011 4 2.5 28 14 1.8 150 130 10.5 86 88 12 23 400 300 12 94 104 13.2 26 50 20 4 120 100 10.5 82 86 12 18 250 10 50 100 LT1022M, LT1022CH LT1022CN8 MIN TYP MAX 100 160 2 10 30 1012 1012 1011 4 2.8 30 15 1.8 400 300 12 92 102 13.2 24 60 22 4 600 1000 20 50 150
VCM = -11V to 8V VCM = 8V to 11V
fO = 10Hz (Note 3) fO = 1kHz (Note 4) fO = 10Hz, 1kHz (Note 5) VO = 10V RL = 2k RL = 1k
VS = 10V to 18V RL = 2k
2
U
U
W
WW U
W
TOP VIEW BAL -IN +IN V- 1 2 3 4 8 7 6 5 N/C V+ OUT BAL
ORDER PART NUMBER LT1022CN8
N8 PACKAGE 8-LEAD PDIP TJMAX = 100C, JA = 130C/W
MIN
UNITS V V pA pA pA pF V/P-P nV/Hz nV/Hz fAHz V/mV V/mV V dB dB V V/s
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LT1022
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER GBW IS Gain-Bandwidth Product Supply Current Settling Time A = +1 or A = -1 10V Step to 0.05% 10V Step to 0.02% RPOT = 100k CONDITIONS f = 1MHz
VS = 15V, TA = 25C, VCM = 0V unless otherwise noted.
LT1022AM LT1022AC TYP MAX 8.5 5.2 0.9 1.3 7 7.0 LT1022M, LT1022CH LT1022CN8 MIN TYP MAX 8.0 5.2 0.9 1.3 7 7.0
MIN
UNITS MHz mA s s mV
Offset Voltage Adjustment Range
The denotes the specifications which apply over the full operating temperature range of VCM = 0V, 0C TA 70C. VS = 15V, unless otherwise noted.
LT1022AC MIN TYP

SYMBOL PARAMETER VOS Input Offset Voltage (Note 2) Average Temperature Coefficient of Input Offset Voltage IOS IB AVOL CMRR PSRR VOUT Input Offset Current Input Bias Current Large-Signal Voltage Gain Common Mode Rejection Ratio Power Supply Rejection Ratio Output Voltage Swing
CONDITIONS H Package N8 Package H Package N8 Package (Note 6) Warmed Up, TA = 70C Warmed Up, TA = 70C VO = 10V, RL = 2k VCM = 10.4V VS = 10V to 18V RL = 2k
MAX 480 5.0 80 200
MIN
LT1022CH LT1022CN8 TYP MAX 180 300 1.8 3.0 18 60 1000 1700 9.0 15.0 100 250
UNITS V V V/C V/C pA pA V/mV dB dB V
140 1.3 15 50 80 85 86 12 250 93 103 13.1
60 80 84 12
250 91 101 13.1
The denotes the specifications which apply over the full operating temperature range of - 55C TA 125C. VS = 15V, VCM = 0V, unless otherwise noted.
SYMBOL PARAMETER VOS Input Offset Voltage Average Temperature Coefficient of Input Offset Voltage IOS IB AVOL CMRR PSRR VOUT Input Offset Current Input Bias Current Large Signal Voltage Gain Common-Mode Rejection Ratio Power Supply Rejection Ratio Output Voltage Swing CONDITIONS (Note 2) (Note 6) Warmed Up, TA = 125C Warmed Up, TA = 125C VO = 10V, RL = 2k VCM = 10.4V VS = 10V to 17V RL = 2k

MIN
LT1022AM TYP 230 1.5 0.3 0.5
MAX 750 5.0 2.0 4.0
MIN
LT1022M TYP 300 2.0 0.30 0.7
MAX 1500 9.0 3.0 6.0
UNITS V V/C nA nA V/mV dB dB V
40 85 86 12
120 92 102 12.9
35 80 84 12
120 90 100 12.9
Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: Offset voltage is measured under two different conditions: (a) approximately 0.5 seconds after application of power; (b) at TA = 25C, with the chip self-heated to approximately 45C to account for chip temperature rise when the device is fully warmed up. Note 3: 10Hz noise voltage density is sample tested on every lot of A grades. Devices 100% tested at 10Hz are available on request.
Note 4: This parameter is tested on a sample basis only. Note 5: Current noise is calculated from the formula: in = (2qIB)1/2, where q = 1.6 * 10 -19 coulomb. The noise of source resistors up to 1G swamps the contribution of current noise. Note 6: Offset voltage drift with temperature is practically unchanged when the offset voltage is trimmed to zero with a 100k potentiometer between the balance terminals and the wiper tied to V +. Devices tested to tighter drift specifications are available on request. 1022fa
3
LT1022 TYPICAL PERFOR A CE CHARACTERISTICS
Gain vs Frequency
140 VS = 15V 120 100 TA = 25C
GAIN (dB)
GAIN (dB)
SLEW RATE (V/s)
20 CL = 10pF 10 GAIN
120 140 160 PHASE CL = 300pF VS = 15V TA = 25C CL = 300pF 1 3 180 200 220 CL = 10pF 240 100
PHASE SHIFT (DEGREES)
80 60 40 20 0 -20 1 10 100 1k 10k 100k 1M 10M 100M FREQUENCY (Hz)
LT1022 * TPC01
PHASE MARGIN (DEGREES)
TA = 125C
TA = -55C
Undistorted Output Swing vs Frequency
30
OUTPUT VOLTAGE SWING FROM 0V (V)
PEAK-TO-PEAK OUTPUT SWING (V)
VS = 15V TA = 25C 24
18
20mV/DIV
12
6
0 100k
1M FREQUENCY (Hz)
LT1022 * TPC04
The typical behavior of many LT1022 parameters is identical to the LT1056. Please refer to the LT1055/1056 data sheet for the following typical performance characteristics:
Input Bias and Offset Currents vs Temperature Input Bias Current Over the Common-Mode Range Distribution of Input Offset Voltage (H and N8 Package) Distribution of Offset Voltage Drift with Temperature Warm-Up Drift Long Term Drift of Representative Units 0.1Hz to 10Hz Noise Voltage Noise vs Frequency Noise vs Chip Temperature Short Circuit Current vs Time Output Impedance vs Frequency Common Mode Range vs Temperature Common Mode and Power Supply Rejections vs Temperature Common Mode Rejection Ratio vs Frequency Power Supply Rejection Ratio vs Frequency Voltage Gain vs Temperature Supply Current vs Supply Voltage Output Swing vs Load Resistance
4
UW
10M
Gain, Phase Shift vs Frequency
30 CLMAX 500pF (AV = +1) 80 100
40
Phase Margin, Gain Bandwidth Product, Slew Rate vs Temperature
VS = 15V CL = 10pF 30 SLEW 20 GBW (f = 1MHz) 60 12 11 10 9 8 7 50 M 6
GAIN BANDWIDTH PRODUCT (MHz)
0
-10
10 30 FREQUENCY (MHz)
40 -50 -25
50 25 0 75 TEMPERATURE (C)
100
125
LT1022 * TPC02
LT1022 * TPC03
Small-Signal Response
10
Settling Time
10mV 5mV 2mV 5 1mV 0.5mV
0
2mV
VS = 15V TA = 25C
-5 5mV 10mV -10 0 1 1mV 2 0.5mV 3
LT1022 * TPC05
AV = +1 CL = 100pF TA = 25C VS = 15V
0.2s/DIV
SETTLING TIME (s)
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LT1022
APPLICATIO S I FOR ATIO
The LT1056 applications information is directly applicable to the LT1022. Please consult the LT1055/1056 data sheet for details on: (1) plug-in compatibility to industry standard devices (2) offset nulling (3) achieving picoampere/microvolt performance
TYPICAL APPLICATIO S
Fast Piezoelectric Accelerometer
1pF TO 5pF
ENDEVCO #2215 ACCELEROMETER 2
U
(4) phase-reversal protection (5) high speed operation (including settling time test circuit) (6) noise performance (7) simplified circuit schematic
1010
W
U
UU
- +
15V 7 LT1022 6 OUTPUT
3
4 -15V
LT1022 * TA03
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5
LT1022
TYPICAL APPLICATIO S
10Hz to 1MHz Voltage-to-Frequency Converter
1.8k 15V 2N2222 100k 2N2222 10pF 1.8k 100pF (POLYSTYRENE) 15V
INPUT 0V TO 10V
5k 22.1k (METAL FILM)
1k 1 1k 7
LT1011 3 4
= 1N4148
-15V
6
-
+
U
10k
1000pF
1.8k
15V 2
20k 2N2222
TTL OUTPUT
+ -
1
8 7 4 1.8k
2
- +
15V 7 6 LT1022
LT1011 3
4.7k
3
4 -15V 15V 8 200k
-15V 100k LT1009
2 0.1F
1.8k -15V
1.8k 15V
LT1022 * TA04
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LT1022
TYPICAL APPLICATIO S
PIN Photodiode-to-Frequency Converter
5pF FULL-SCALE TRIM
15V
1.8k
4.7k LM329 15V 7 6 10M LIGHT INPUT -15V 3.3M 10k DARK CURRENT TRIM LT1022 3
1k
1k
7 LT1011 1 4 -15V 3
SCALE FACTOR = 1nW/Hz AT 900 NANOMETERS FROM 20nW TO 2mW = HEWLETT PACKARD PHOTODIODE HP5082-4204 = 1N4148 POLYSTYRENE * SELECT VALUE FOR 2mW IN = 2MHz OUT
LT1022 * TA05
-
+
U
47pF* 15V 2N2222 100k 2N2222 2pF 1.8k
10k
1000pF
1.8k
15V 2
20k 2N2222
TTL OUTPUT 20Hz 2MHz 4.7k
+ -
1
8 7 4 1.8k
LT1011 3
2
- +
4 -15V 15V 8 2 200k
-15V 100k
LT1004 2.5V 1.8k 0.1F -15V 1.8k 15V
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LT1022
TYPICAL APPLICATIO S
Wide Bandwidth Absolute Value Circuit
10k* 10pF 10k* 10k* 10pF
INPUT 10V
VIN1
VIN2
8
U
15V 10k* 2
1N4148 6
15V 2
- +
7 LT1022
- +
7 LT1022 6 OUTPUT 0V TO 10V
3
3 4 -15V 10k* 1N4148
4 -15V *0.1% 1% ACCURACY TO 300kHz 5% ACCURACY TO 700kHz
LT1022 * TA06
Fast, Differential Input Current Source
15V R* 2
- +
7 LT1022 6
10pF
R* IOUT =
VIN2 - VIN1 R
R*
3
4 -15V
R* IOUT RL
*MATCH TO 0.01% FULL-SCALE POWER BANDWIDTH = 1MHz FOR IOUTR = 8VP-P = 400kHz FOR IOUTR = 20VP-P MAXIMUM IOUT = 10mAP-P IOUTP-P * RL COMMON-MODE VOLTAGE AT LT1022 INPUT = 2
LT1022 * TA07
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LT1022
TYPICAL APPLICATIO S
High Output Current Op Amp
15V RS 2 15V CF 6 LT1010 10k OUTPUT SLEW RATE = 26V/s IOUT = 150mA CL CAN BE 1F AV = +1, CF = 1000pF AV = -1, CF = 10pF
LT1022 * TA08
U
- +
7 LT1022
3
4 -15V -15V
Low Distortion Sine Wave Oscillator
15V 2 0.033F
# 327 LAMP
430 6
- +
7 LT1022 OUTPUT 0.033F
3
4 -15V 10k 953*
953*
10k
* 1% FILM 10k DUAL POTENTIOMETER -- MATCH TRACKING TO 0.1% MATCH CAPACITORS TO 0.1% 5kHz TO 50kHz RANGE DISTORTION < 0.1% AMPLITUDE = 18VP-P
LT1022 * TA09
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9
LT1022
TYPICAL APPLICATIO S
Fast, Precision Sample-And-Hold
1k
-
INPUT
330pF LT1022 LT1010
+
LEVEL SHIFT
15V 39pF HP5082-2810 3k 1N4148 4.7k* 1.5k
TTL INPUT
1k 2N2369 470 20k 1N4148 -15V 0.1F 820 820 1000pF 2N2369
16ns APERTURE TIME 2s ACQUISITION TIME TO 0.01% SAMPLE-AND-HOLD OFFSET < 250V HOLD SETTLING < 100ns
10
U
SAMPLE-AND-HOLD SIGNAL PATH 2N4393
2k
-
LT1022 OUTPUT
+
2N2222
2N2907
1000pF POLYSTYRENE
10k
HOLD STEP COMPENSATION
-15V 20pF
15pF 13k
5.1k HP5082-2810 LT318A 2N2222 5k HOLD STEP COMPENSATION TRIM
- +
3.5k
LT1020 * TA10
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LT1022
PACKAGE DESCRIPTIO
SEATING PLANE 0.010 - 0.045* (0.254 - 1.143) 0.016 - 0.021** (0.406 - 0.533)
45TYP 0.028 - 0.034 (0.711 - 0.864)
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
H Package 8-Lead TO-5 Metal Can (.200 Inch PCD)
(Reference LTC DWG # 05-08-1320)
0.335 - 0.370 (8.509 - 9.398) DIA 0.305 - 0.335 (7.747 - 8.509) 0.040 (1.016) MAX 0.050 (1.270) MAX GAUGE PLANE 0.165 - 0.185 (4.191 - 4.699) REFERENCE PLANE 0.500 - 0.750 (12.700 - 19.050) 0.027 - 0.045 (0.686 - 1.143) PIN 1 0.200 (5.080) TYP 0.110 - 0.160 (2.794 - 4.064) INSULATING STANDOFF *LEAD DIAMETER IS UNCONTROLLED BETWEEN THE REFERENCE PLANE AND 0.045" BELOW THE REFERENCE PLANE 0.016 - 0.024 **FOR SOLDER DIP LEAD FINISH, LEAD DIAMETER IS (0.406 - 0.610)
H8(TO-5) 0.200 PCD 1197
OBSOLETE PACKAGE
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LT1022
PACKAGE DESCRIPTIO U
N8 Package 8-Lead PDIP (Narrow .300 Inch)
(Reference LTC DWG # 05-08-1510)
0.400* (10.160) MAX 8 7 6 5 0.255 0.015* (6.477 0.381) 1 0.300 - 0.325 (7.620 - 8.255) 2 3 4 0.130 0.005 (3.302 0.127) 0.045 - 0.065 (1.143 - 1.651) 0.065 (1.651) TYP 0.125 (3.175) 0.020 MIN (0.508) MIN 0.018 0.003 (0.457 0.076)
N8 1098
0.009 - 0.015 (0.229 - 0.381) +0.035 0.325 -0.015
(
8.255
+0.889 -0.381
)
0.100 (2.54) BSC
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
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Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 FAX: (408) 434-0507
LW/TP 0902 1K REV A * PRINTED IN USA
www.linear.com
LINEAR TECHNOLOGY CORPORATION 1985

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