®1002 dual, matched precision operational amplifiers combine excellent

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®1002 dual, matched precision operational amplifiers combine excellent

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LT1002 Dual, Matched Precision Operational Amplifier
®1002 dual, matched precision operational amplifiers combine excellent individual amplifier performance with tight matching temperature tracking between amplifiers. design, processing, testing device, particular attention been paid optimization entire distribution several parameters their matching. Consequently, specifications even cost commercial grade (the LT1002C) have been spectacularly improved compared presently available devices. Essentially, input offset voltage units less than 80µV, matching between amplifiers consistently beter than 60µV (see distribution plot below). Input bias offset currents, channel separation, common mode power suply rejections LT1002C specified levels which were previsouly attainable only very expensive, selected grades other dual devices. Power dissipation nearly halved compared most popular precision duals, without adversely affecting noise speed performance. by-product lower dissipation decreased warm-up drift. even better performance single precision amp, refer LT1001 data sheet. bridge signal conditioning application shown below. This circuit illustrates requirement both excellent matching individual amplifier specifications.
registered trademarks Linear Technology Corporation.
Guaranteed offset voltage LT1002A 60µV LT1002 100µV Guaranteed offset voltage match LT1002A 40µV LT1002 80µV Guaranteed drift LT1002A 0.9µV/°C LT1002 1.3µV/°C Guaranteed CMRR LT1002A 110dB LT1002 110dB Guaranteed channel separation LT1002A 132dB LT1002 130dB Guaranteed maching characteristics noise 0.35µV
APPLICATIONS
Thermocouple Amplifiers Strain Gauge Amplifiers level signal processing Medical instrumentation Precision dual limit threshold detection Instrumentation amplifierStrain Gauge Signal Conditioner with Bridge Excitation
+15V +15V 8.2k 2.0K* 4.99k*
LM329
LT1002
IN4148
2N2219
REFERENCE MONITORING CONVERTER
NUMBER UNITS
BRIDGE 301k ZERO
LT1001 340k*
IN4148 LT1002 2N2907 *RN60C FILM RESISTORS -15V
GAIN TRIM
1.1k*
1002 TA01
Distribution Offset Voltage Match
±15V 25°C UNITS TESTED
-100 INPUT OFFSET VOLTAGE MATCH (µV)
1002 TA02
LT1002
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (Note ±22V Differential Input Voltage ±30V Input Voltage Equal Supply Voltage Output Short Circuit Duration Indefinite Operating Temperature Range LT1002AM/LT1002M 55°C 125°C LT1002AC/LT1002C 70°C Storage Temperature Range Grades 65°C 150°C Lead Temperature (Soldering, sec.). 300°C
PACKAGE/ORDER INFORMATION
VIEW NULL NULL PACKAGE HERMETIC
ORDER PART LT1002AMJ LT1002MJ LT1002ACJ LT1002CJ LT1002ACN LT1002CN
NULL NULL
OFFSET VOLTAGE 25°C 60µV 100µV 60µV 100µV 60µV 100µV
PACKAGE PLASTIC
NOTE: Device operated even insertion reversed; this inherent symmetry locations amplifiers (Note
ELECTRICAL CHARACTERISTICS, DIVIDUAL PLIFIERS
±15V, 25°C, unless otherwise noted
SYMBOL Time AVOL CMRR PSRR VOUT PARAMETER Input Offset Voltage Long Term Input Offset Voltage Stability Input Offset Current Input Bias Current Input Noise Voltage Input Noise Voltage Density Large Signal Voltage Gain Common Mode Rejection Ratio Power Supply Rejection Ratio Input Resistance Differential Mode Input Voltage Range Maximum Output Voltage Swing Slew Rate Gain Bandwidth Product Power Dissipation amplifier (Note Note load load, 0.1Hz 10Hz (Note 10Hz (Note 1000Hz (Note ±12V ±10V ±13V ±18V Note CONDITIONS Note Notes LT1002AM/LT1002AC ±0.6 0.35 10.3 ±13.5 0.25 ±3.0 20.0 11.5 LT1002M/LT1002C ±0.7 0.38 10.5 ±13.5 0.25 ±4.5 0.75 20.0 12.0 UNITS µV/month µVp-p nVHz V/mV V/µs
LT1002
ELECTRICAL CHARACTERISTICS, DIVIDUAL PLIFIERS
±15V, 55°C 125°C, unless otherwise noted
SYMBOL Temp AVOL CMRR PSRR VOUT PARAMETER Input Offset Voltage Average Input Offset Voltage Drift Input Offset Current Input Bias Current Large Signal Voltage Gain Common Mode Rejection Ratio Power Supply Rejection Ratio Input Voltage Range Output Voltage Swing Power Dissipation amplifier load ±10V ±13V ±18V CONDITIONS Note
LT1002AM ±1.0 ±6.0
±12.5 ±13.5
±15V, 70°C, unless otherwise noted
SYMBOL Temp AVOL CMRR PSRR VOUT PARAMETER Input Offset Voltage Average Input Offset Voltage Drift Input Offset Current Input Bias Current Large Signal Voltage Gain Common Mode Rejection Ratio Power Supply Rejection Ratio Input Voltage Range Output Voltage Swing Power Dissipation amplifier Load ±10V ±13V ±18V CONDITIONS Note
LT1002AC ±0.7 ±4.5
±12.5 ±13.8
denotes specifications which apply over full operating temperature range. MIL-STD components, please refer 883C data sheet test listing parameters. Note Offset voltage measured with high speed test equipment, approximately 1second after power applied. Note This parameter tested sample basis only. Note Long Term Input Offset Voltage Stability refers averaged trend line versus Time over extended periods after first days operation. Excluding initial hour operation, changes during first operating days typically 2.5µV.
Note Parameter guaranteed design. Note 10Hz noise voltage density sample tested every lot. Devices 100% tested 10Hz available request. Note supply terminals completely independent powered separate supplies desired (this approach, however, would sacrifice advantages power supply rejection ratio matching). supply terminals both connected common substrate must tied same voltage. Both pins should used.
LT1002M ±1.5 ±9.0
UNITS µV/°C V/mV
±12.0
±13.5
LT1002C ±1.0 ±6.0
UNITS µV/°C V/mV
±12.5
±13.8
LT1002
ATCHI CHARACTERISTICS ±15V, 25°C, unless otherwise noted
PARAMETER Input Offset Voltage Match Average Non-Inverting Bias Current Non-Inverting Offset Current Inverting Offset Current Common Mode Rejection Ratio Match Power Supply Rejection Ratio Match Channel Seperation ±13V ±18V 10Hz (Note CONDITIONS LT1002AM/AC ±0.6 ±3.5 LT1002M/C ±0.7 ±4.8 UNITS
SYMBOL IOS+ IOS- CMRR PSRR
ATCHI CHARACTERISTICS ±15V, 55°C 125°C, unless otherwise noted
PARAMETER Input Offset Voltage Match Input Offset Voltage Tracking Average Non-Inverting Bias Current Non-Inverting Offset Current Inverting Offset Current Common Mode Rejection Ratio Match Power Supply Rejection Ratio Match ±13V ±18V CONDITIONS
SYMBOL
IOS+ IOS- CMRR PSRR
ATCHI CHARACTERISTICS ±15V, 70°C, unless otherwise noted
PARAMETER Input Offset Voltage Match Input Offset Voltage Tracking Average Non-Inverting Bias Current Non-Inverting Offset Current Inverting Offset Current Common Mode Rejection Ratio Match Power Supply Rejection Ratio Match ±13V ±18V CONDITIONS
SYMBOL
IOS+ IOS- CMRR PSRR
LT1002AM ±1.5 ±6.0
LT1002M ±1.8 ±10.0 12.0 12.0
UNITS µV/°C
LT1002AC ±1.0 ±4.5
LT1002C ±1.2 ±7.0
UNITS µV/°C
LT1002 TYPICAL PERFORMANCE CHARACTERISTICS
Distribution Offset Voltage Individual Amplifier100
±15V 25°C UNITS TESTED
NUMBER UNITS
NUMBER UNITS
NUMBER UNITS
-100 INPUT OFFSET VOLTAGE (µV)
1002
Offset Voltage Drift with Temperature Representative UnitINDIVIDUAL AMPLIFIER OFFSET VOLTAGE (µV)
OFFSET VOLTAGE MATCH (µV)
±15V LT1002M LT1002AM
1002
CHANGE OFFSET VOLTAGE (MICROVOLTS)
-100 LT1002M
002AM
LT1002M LT1002AM
LT10 02AM
LT1002M
TEMPERATURE (°C)
Long Term Stability Four Representative Unit10
OFFSET VOLTAGE CHANGE (µV)
VOLTAGE NOISE nV/Hz
CORNER VOLTAGE
CORNER 70Hz CURRENT
TIME (MONTHS)
1001
TIME (SECONDS)
1001
FREQUENCY (Hz)
1000
1002
CURRENT NOISE pA/Hz
NOISE VOLTAGE 100nV/DIV
1002
Distribution Offset Voltage Drift with Temperature (Individual Amplifiers)
UNITS TESTED ±15V
Distribution Offset Voltage Match Drift with Temperature
±15V UNITS TESTED
-1.2
+0.4 +0.8 +1.2 -0.8 -0.4 INPUT OFFSET VOLTAGE DRIFT WITH TEMPERATURE (µV/°C) 1002
-1.2
+0.4 +0.8 +1.2 -0.8 -0.4 OFFSET VOLTAGE MATCH DRIFT WITH TEMPERATURE (µV/°C) 1002
Offset Voltage Tracking with Temperature Representative Unit100
Warm-Up Drift
±15V 25°C PLASTIC PACKGE
HERMETIC PACKGE
T100
LT1002AM LT1002M
-100
TIME AFTER POWER BOTH AMPLIFIERS (MINUTES)
1002
TEMPERATURE (°C)
1002
0.1Hz 10Hz Noise
Noise Spectrum
25°C ±18V
LT1002 TYPICAL PERFORMANCE CHARACTERISTICS
Matching Individual Amplifier Bias Offset Currents Temperature
±15V INPUT BIAS CURRENT (nA)
INPUT BIAS OFFSET CURRENTS (nA)
INVERTING NON-INVERTING INPUT BIAS CURRENT (mA)
MATCHING: INVERTING BIAS CURRENT
OFFS ERING RRENT URRE RENT
TEMPERATURE (°C)
Open Loop Voltage Gain Temperature
OPEN LOOP VOLTAGE GAIN (V/V)
OPEN LOOP VOLTAGE GAIN (dB)
1200k 1000k 800k 600k 400k 200k ±15V, ±12V ±3V,
VOLTAGE GAIN (dB)
±15V
GAIN 125°C GAIN 25°C -55°C ±15V PHASE MARGIN -55°C 125°C FREQUENCY (MHz)
1002
25°C PHASE MARGIN
TEMPERATURE (°C)
100k FREQUENCY (Hz)
1002
1002
Open Loop Gain Mismatch Frequency
OPEN LOOP GAIN MISMATCH (PERCENT)
Closed Loop Output Impedance
POWER SUPPLY REJECTION (dB)
Power Supply Rejection PSRR Match Frequency
FREQUENCY (Hz) 100k NEGATIVE SUPPLY POSITIVE SUPPLY MATCH (POSITIVE SUPPLY) ±15V 25°C MATCH (NEGATIVE SUPPLY)
±15V 25°C OUTPUT IMPEDANCE
1000 ±1mA ±15V 25°C FREQUENCY (Hz) 100k
1002
PERCENT GAIN MISMATCH OUTPUT OUTPUT 100% (OUTPUT OUTPUT
0.01
FREQUENCY (Hz) 100k
1002
0.001
1002
PHASE SHIFT (DEGREES)
1001
Input Bias Current Over Common Mode Range
Input Bias Current Differential Input Voltage
±15V 25°C
DEVICE WITH POSITIVE INPUT CURRENT ±15V 25°C
DEVICE WITH NEGATIVE INPUT CURRENT -1.0 -1.5 COMMON-MODE INPUT RESISTANCE 280G 0.1nA COMMON-MODE INPUT VOLTAGE
DIFFERENTIAL INPUT (VOLTS)
1002
1002
Open Loop Voltage Gain Frequency Response
25°C
Gain, Phase Shift Frequency
PHASE 25°C
LT1002 TYPICAL PERFORMANCE CHARACTERISTICS
Channel Separation Frequency
CHANNEL SEPARATION (dB)
COMMON MODE REJECTION (dB)
CMRR
MATCH CMRR)
COMMON MODE LIMIT (VOLTS) REFERRED POWER SUPPLY
=100
100k FREQUENCY (Hz)
1002
Supply Churrent Supply Voltage Each Amplifier
OUTPUT VOLTAGE, PEAK-TO-PEAK (VOLTS)
SUPPLY CURRENT (mA)
-55°C 125°C
SUPPLY VOLTAGE
1002
Small Signal Transient Response
PERCENT OVERSHOOT
50pF
±15V 25°C
Common Mode Rejection CMRR Match Frequency
±15V 25°C
-0.2 -0.4 -0.6 -0.8 -1.0
Common Mode Limit Temperature
FREQUENCY (Hz)
100k
+1.0
-18V -1.2
TEMPERATURE (°C)
1002
1002
Large Signal Transient Response
1002
Maximum Undistorted Output Frequency
±15V +25°C
25°C
FREQUENCY (kHz)
1000
1002
Voltage Follower Overshoot Capacitive Load
±15V 25°C 100mV
Small Signal Transient Response
1002
10,000 1000 CAPACITIVE LOAD (PICOFARADS)
100,000 1000pF
1002 1002
LT1002 TYPICAL PERFORMANCE CHARACTERISTICS
Output Swing Load Resistance
SHORT CIRCUIT CURRENT (mA) SINKING SOURCING
NEGATIVE SWING
OUTPUT SWING (VOLTS)
±15V 25°C 1000 LOAD RESISTANCE
1002
APPLICATIONS INFORMATION
LT1002 dual amplifier inserted directly into OP-10, OP207, OP227 sockets with without removal external nulling potentiometers. Offset Voltage Adjustment input offset voltage LT1002, drift with temperature, permanently trimmed wafer testing level. However, further adjustment necessary, nulling with potentiometer will degrade drift with temperature. Trimming value other than zero creates drift (VOS/ 300)µV/°C, e.g. adjusted 300µV, change drift will 1µV/°C. adjustment range with approximately ±2.5mV. less adjustment range needed, sensitivity resolution nulling improved using smaller conjunction with fixed resistors. example approximate null range ±100µV. matching applications, both amplifiers trimmed zero, offset amplifier trimmed match offset other. Offset adjustment, however, slightly degrades gain, common-mode powersupply rejection match between amps. Fortunately, guaranteed offset voltage match LT1002 very low, most applications offset adjustment will unnecessary.
Standard Adjustment
(10) INPUT (11)
Improved Sensitivity Adjustment
(10) INPUT (11)
Output Short Circuit Current Time
TIME FROM OUTPUT SHORT (MINUTES) -55°C 25°C 125°C ±15V 125°C 25°C -55°C
POSITIVE SWING
1002
+15V
OUTPUT
LT1002
-15V
1002 TA03
7.5k 7.5k +15V
OUTPUT
LT1002
-15V
1002 TA04
LT1002
APPLICATIONS INFORMATION
Test Circuit Offset Voltage Drift with Temperature
*50k +15V
0.1µF
(10) (11)
-15V *RESISTORS MUST HAVE THERMOELECTRIC POTENTIAL.
1002 TA05
1000
This circuit also used burn-in configuration LT1002, with supply voltages increased ±20V. Unless proper care exercised, thermocouple effects, caused temperature gradients across dissimilar metals contacts input terminals, exceed inherent drift amplifier. currents should minimized, package leads should short, input leads should close together possible maintained same temperature.
Power supplies LT1002 specified over wide range power supply voltages from ±18V. Operation with lower supplies possible, down ±1.2V (two Ni-Cad batteries). However, with ±1.2V supplies, device stable only closed loop gains higher inverting gain higher). supply terminals completely independent powered separate supplies desired (this approach, however, would sacrifice advantages power supply rejection ratio matching). supply terminals both connected common substrate must tied same voltage. Both pins should used.
Channel Separation This parameter defined ratio change input offset voltage amplifier change output voltage other amplifier causing offset change. frequencies LT1002's channel separation almost unmeasurable 148dB. frequency increases, capacitance package, between output amplifier inputs other, becomes dominant. Since these pins non-adjacent, capacitance only 0.02pF. maintain LT1002's excellent channel separation higher frequencies, socket board capacitances should minimized.
100k
LT1002
0.1Hz 10Hz Noise Test Circuit
device under test should warmed three minutes shielded from currents. Turn device 180° measure noise side
VOLTAGE GAIN 50,000
LT1002
LT1002
4.3k
22µF SCOPE 110k
DEVICE UNDER TEST
100k 2.2µF
24.3k
1002 TA06
(Peak Peak noise measured interval)
LT1002
APPLICATIONS INFORMATION
Advantages Matched Dual Amps many applications performance system depends matching between operational amplifiers rather than individual characteristics amps. three instrumentation amplifiers, tracking voltage references drift active filters some circuits requiring matching between amps. well-known triple configuration illustrates these concepts. Output offset function difference between offsets halves LT1002. This error cancellation principle holds considerable number input referred parameters addition offset voltage drift with temperature. Input bias current will average non-inverting input currents (IB+). difference between these currents (IOS+) offset current instrumentation amplifier. difference between inverting input currents (IOS-) will cause errors flowing through Commonmode power supply rejections will dependent only match between amplifiers (assuming perfect resistor matching). concepts common mode power supply rejection ratio match (CMRR PSRR) best demonstrated with numerical example: Assume CMRRA 1.0µV/V 120dB, CMRRB 0.75µV/V 122.5dB, then CMRR 0.25µV/V 132dB; CMRRB 0.75µV/V which still 122.5dB, then CMRR 1.75µV/V 115dB. Clearly, LT1002, specifying guaranteeing these matching parameters, significantly improve performance matching dependent circuits.
Three Instrumentation Amplifier
INPUT
LT1002
2.1k
100k 100pF LT1037 OUTPUT
INPUT
9.76k
Gain 1000
LT1002
1002 TA07
Trim gain Trim common mode rejection Trim common mode rejection
Typical performance instrumentation amplifier: Input offset voltage 25µV Input bias current 0.7nA Input resistance Input offset current 0.6nA Input noise 0.5µV Power bandwidth ±10V) 80kHz
LT1002
APPLICATIONS INFORMATION
Precision ±10V Reference
+15V 130k
LT1002
LM129A
8.2k
LT1002 contributes less than total drift with temperature, noise long term drift reference.
Dual Limit Microvolt Comparator
+15V 39.2 FLV117
CA3118
UPPER LIMIT
LT1002
-15V
INPUT 430k
LT1002
LOWER LIMIT
-15V
When upper lower limit exceeded lights Positive feedback nulling terminals creates 20µV hysteresis both amplifiers.
3.3k 0.1% 0.1% 3.3k -15V
10.000V
-10.000V
LT1002
1002 TA08
accuracy -10V output limited matching resistors.
430k
CA3118
39.2
CA3118
CA3118
1002 TA09
feedback changes offset voltage LT1002 less than 5µV. Therefore, basic accuracy comparator limited only offset voltage LT1002.
LT1002
APPLICATIONS INFORMATION
Instrumentation Amplifier
2.2k+ 100k* 100k
LT1002
INPUTS
TRIM COMMON-MODE REJECTION TRIM GAIN Gain
Precision Amplifier Drives Load ±10V
1.1Rf 0.1RS 110k
LT1002 -15V 100k 0.2RL
+15V OUTPUT
LT1002
INPUT
-15V
1002 TA11
LT1002
OUTPUT
1002 TA10
This application utilizes guaranteed 10mA load driving capability LT1002. offset voltage amplifier offset configuration. Amplifier provides additional 10mA load current. When load resistor removed, amplifier sinks this current without affecting accuracy. gain 1000 configuration shown, approximately 0.3% gain accuracy realized.
LT1002
APPLICATIONS INFORMATION
Dead Zone Generator
INPUT 100k 100k 10k* 2N4393 30pF 4.7k 10k* VSET DEAD ZONE CONTROL INPUT BIPOLAR SYMMETRY EXCELLENT BECAUSE DEVICE, SETS BOTH LIMITS
LM301A
100k
IN914 +15V 100k 15pF 4.7k
LM301A
4.7k
-15V
Precision Absolute Value Circuit
INPUT
0.1%
LT1002
IN4148
0.1%
47pF
LT1002
10k** 10k** 2N4393
LT1002
15pF
VOUT
3.3k
IN914 VSET VOUT VSET
FILM RATIO MATCH 0.05% 3096 TRANSISTOR ARRAY
1002 TA12
0.1% IN4148
0.1%
0.1%
LT1002
OUTPUT
1002 TA13
LT1002
APPLICATIONS INFORMATION
8.2k TRIAD TY-90 VN-46 LM399 DIODES SEMTECH FF-15 74C74 +15V 1.8k CLAMP IN914
1002 TA14
43k* (select)
+15V
-15V KVD= ESI#DP311 JULIE RSCH. LABS #R-44 680pF
LT301A
22k*
IN914 2N2219
LT1002
Dual Precision Power Supply 100µV Steps 100V StepOUTPUT 0-10V 25mA
00000 99999 KELVIN-VARLEY DIVIDER ESI#DP311 VN-46
90k*
OUTPUT 0-100V, 25mA
10k* (select) TRIM-100V
2N6533 IN914 2N2907
LT1002
22µf
LT1002
SCHE ATIC DIAGRA
NULL
NULL
55pF 20pF
LT1002
PACKAGE Package 14-Lead PDIP (Narrow 0.300)
(LTC 05-08-1510)
0.770* (19.558)
0.255 0.015* (6.477 0.381)
0.300 0.325 (7.620 8.255) 0.130 0.005 (3.302 0.127) 0.015 (0.380) 0.009 0.015 (0.229 0.381)
0.045 0.065 (1.143 1.651)
0.005 (0.125) +0.635 8.255 -0.381 0.100 0.010 (2.540 0.254) *THESE DIMENSIONS INCLUDE MOLD FLASH PROTRUSIONS. MOLD FLASH PROTRUSIONS SHALL EXCEED 0.010 INCH (0.254mm)
+0.025 0.325 -0.015
0.125 (3.175)
TJMAX LT1002ACN LT1002CN 125°C
100°C/W
Information furnished Linear Technology Corporation believed accurate reliable. However, responsibility assumed use. Linear Technology Corporation makes representation that interconnection circuits described herein will infringe existing patent rights.
1.5k 30pF
1002
Dimensions inches (millimeters) unless otherwise noted. Package 14-Lead CERDIP (Narrow 0.300, Hermetic)
(LTC 05-08-1110)
CORNER LEADS OPTION PLCS) 0.005 (0.127) 0.785 (19.939)
0.023 0.045 (0.584 1.143) HALF LEAD OPTION 0.045 0.068 (1.143 1.727) FULL LEAD OPTION
0.025 (0.635)
0.220 0.310 (5.588 7.874)
0.300 (0.762 BSC)
0.200 (5.080) 0.015 0.060 (0.381 1.524)
0.065 (1.651) 0.018 0.003 (0.457 0.076)
0695
0.008 0.018 (0.203 0.457) 0.385 0.025 (9.779 0.635)
0.045 0.068 (1.143 1.727) 0.014 0.026 (0.360 0.660)
0.100 0.010 (2.540 0.254)
0.125 (3.175)
0694
NOTE: LEAD DIMENSIONS APPLY SOLDER PLATE LEADS.
TJMAX LT1002ACJ LT1002CJ LT1002AMJ LT1002MJ 125°C 125°C
100°C/W 100°C/W
LT1002
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, 95035-7417
(408) 432-1900 FAX: (408) 434-0507 TELEX: 499-3977
LT/GP 0396 PRINTED
LINEAR TECHNOLOGY CORPORATION 1985

®1002 dual, matched precision operational amplifiers combine excellent

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