LT1024 데이터 시트보기 (PDF) - Linear Technology

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LT1024

Dual, Matched Picoampere, Microvolt Input, Low Noise Op Amp

Linear Technology 

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

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