LT1024_15 Datasheet, PDF (1/12 Pages) Linear Technology – Dual, Matched Picoampere, Microvolt Input, Low Noise Op Amp

FEATURES
■ _{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}
U
APPLICATIO S
■ _{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.
LT1024
Dual, Matched
Picoampere, Microvolt Input,
Low Noise Op Amp
DESCRIPTIO
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.
TYPICAL APPLICATIO
Two Op Amp Instrumentation Amplifier
R5
2.2k ^†
R4
100k
R1*
R2
100k
10k
–
INPUTS
+
3_–
R3
1/2 LT1024 ^{13 10k 10} –
4₊
6
1/2 LT1024
11 ₊
OUTPUT
( ) GAIN = ^R4 1 + ^{1 R2} + ^R3 + ^{R2 + R3} ~ 100
R3
2 R1 R4
R5
TYPICAL PERFORMANCE:
OFFSET VOLTAGE = 20µV
BIAS CURRENT = ±30pA
OFFSET CURRENT = 30pA
*TRIM FOR COMMON-MODE REJECTION
† _{TRIM FOR GAIN}
LT1024 • TA01
Input Bias Current vs Temperature
100
50
UNDERCANCELLED UNIT
0
OVERCANCELLED UNIT
–50
–100
–150
–50 –25
0 25 50 75 100 125
TEMPERATURE (°C)
LTC1024 • TA02
1024fa
1