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LT1008

1008fb

Picoamp Input Current,

Microvolt Offset,

Low Noise Op Amp

The LT

that can be used in practically all precision applications.

The LT1008 combines for the first time, 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, and the

ability to deliver 5mA load current with high voltage gain

round out the LT1008’s superb precision specifications.

The all around excellence of the LT1008 eliminates the

necessity of the time consuming error analysis procedure

of precision system design in many applications; the

LT1008 can be stocked as the universal precision op amp.

The LT1008 is externally compensated with a single ca-

pacitor for additional flexibility in shaping the frequency

response of the amplifier. It plugs into and upgrades all

standard LM108A/LM308A applications. For an internally

compensated version with even lower offset voltage but

otherwise similar performance see the LT1012.

μV Max

■

Guaranteed Drift: 1.5

μV/°C Max

μA Max

■

Guaranteed CMRR: 114dB Min

■

Available in 8-Lead PDIP and SO Packages

Input Amplifier for 4.5 Digit Voltmeter

FEATURES

DESCRIPTIO

APPLICATIO S

TYPICAL APPLICATIO

LT1008

1

1000pF

2

3

100k

5%

8

4

7

15V

–15V

6

0.1V

INPUT

1V

10V

10V

1V

100V

1000V

1008 TA01

TO 1V FULL-SCALE

ANALOG-TO-DIGITAL

CONVERTER

*RATIO MATCH

±0.01%

9M

100V

900k

9k*

0.1V

1k*

1000V

FN507

ALLEN BRADLEY

DECADE VOLTAGE DIVIDER

THIS APPLICATION REQUIRES LOW

BIAS CURRENT AND OFFSET VOLTAGE,

LOW NOISE AND LOW DRIFT WITH

TIME AND TEMPERATURE

90k

10k

TEMPERATURE (

°C)

–50

–150

–50

100

0

50

75

1008 TA02

–100

50

0

–25

25

100

125

UNDERCANCELLED UNIT

OVERCANCELLED UNIT

Input Bias Current vs Temperature

, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.