LT1024
Dual, Matched
Picoampere, Microvolt Input,
Low Noise Op Amp
DESCRIPTIO
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FEATURES
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Guaranteed Offset Voltage: 50µV Max
Guaranteed Bias Current:
25°C: 120pA Max
–55°C to 125°C: 700pA Max
Guaranteed Drift: 1.5µV/°C Max
Low Noise, 0.1Hz to 10Hz: 0.5µVP-P
Guaranteed Supply Current: 600µA Max
Guaranteed CMRR: 112dB Min
Guaranteed PSRR: 112dB Min
Guaranteed Voltage Gain with 5mA Load Current
Guaranteed Matching Characteristics
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APPLICATIO S
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Strain Gauge Signal Conditioner
Dual Limit Precision Threshold Detection
Charge Integrators
Wide Dynamic Range Logarithmic Amplifiers
Light Meters
Low Frequency Active Filters
Standard Cell Buffers
Thermocouple Amplifiers
, LTC and LT are registered trademarks of Linear Technology Corporation.
The LT ®1024 dual, matched internally compensated
universal precision operational amplifier can be used in
practically all precision applications requiring multiple op
amps. The LT1024 combines picoampere bias currents
(which are maintained over the full –55°C to 125°C
temperature range), microvolt offset voltage (and low drift
with time and temperature), low voltage and current
noise and low power dissipation. Extremely high
common mode and power supply rejection ratios,
practically immeasurable warm-up drift, and the ability to
deliver 5mA load current with a voltage gain of a million,
round out the LT1024’s superb precision specifications.
Tight matching is guaranteed on offset voltage,
noninverting bias currents and common mode and power
supply rejections.
The all-around excellence of the LT1024 eliminates the
necessity of the time-consuming error analysis procedure
of precision system design in many dual applications; the
LT1024 can be stocked as the universal dual op amp in the
14-pin DIP configuration.
For a single op amp with similar specifications, see the
LT1012 data sheet; for a single supply dual precision op
amp in the 8-pin configuration, see the LT1013 data sheet.
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TYPICAL APPLICATIO
Two Op Amp Instrumentation Amplifier
R1*
100k
R2
10k
3
–
1/2 LT1024
–
4
13
R3
10k
10
+
+
+
( R2 + R3 ) + R2R5R3
R1 R4
–
1/2 LT1024
11
INPUTS
GAIN = R4 1 + 1
R3
2
100
R4
100k
~ 100
6
OUTPUT
+
INPUT BIAS CURRENT (pA)
R5
2.2k †
Input Bias Current vs Temperature
50
UNDERCANCELLED UNIT
0
OVERCANCELLED UNIT
–50
–100
TYPICAL PERFORMANCE:
OFFSET VOLTAGE = 20µV
BIAS CURRENT = ±30pA
OFFSET CURRENT = 30pA
–150
–50 –25
50
25
0
75
TEMPERATURE (°C)
100
125
LTC1024 • TA02
* TRIM FOR COMMON-MODE REJECTION
† TRIM FOR GAIN
LT1024 • TA01
1024fa
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