1

LT1001

1001fb

TYPICAL APPLICATIO

APPLICATIO S

DESCRIPTIO

FEATURES

Precision Operational

Amplifier

s

Guaranteed Low Offset Voltage

LT1001AM

15

µV max

LT1001C

60

µV max

s

Guaranteed Low Drift

LT1001AM

0.6

µV/°C max

LT1001C

1.0

µV/°C max

s

Guaranteed Low Bias Current

LT1001AM

2nA max

LT1001C

4nA max

s

Guaranteed CMRR

LT1001AM

114dB min

LT1001C

110dB min

s

Guaranteed PSRR

LT1001AM

110dB min

LT1001C

106dB min

s

Low Power Dissipation

LT1001AM

75mW max

LT1001C

80mW max

s

Low Noise 0.3

The LT

art of precision operational amplifiers. In the design,

processing, and testing of the device, particular atten-

tion has been paid to the optimization of the entire

distribution of several key parameters. Consequently,

the specifications of the lowest cost, commercial tem-

perature device, the LT1001C, have been dramatically

improved when compared to equivalent grades of com-

peting precision amplifiers.

Essentially, the input offset voltage of all units is less

than 50

µV (see distribution plot below). This allows the

LT1001AM/883 to be specified at 15

µV. Input bias and

offset currents, common-mode and power supply re-

jection of the LT1001C offer guaranteed performance

which were previously attainable only with expensive,

selected grades of other devices. Power dissipation is

nearly halved compared to the most popular precision

op amps, without adversely affecting noise or speed

performance. A beneficial by-product of lower dissipa-

tion is decreased warm-up drift. Output drive capability

of the LT1001 is also enhanced with voltage gain

guaranteed at 10mA of load current. For similar perfor-

mance in a dual precision op amp, with guaranteed

matching specifications, see the LT1002. Shown below

is a platinum resistance thermometer application.

s

Thermocouple amplifiers

s

Strain gauge amplifiers

s

Low level signal processing

s

High accuracy data acquisition

INPUT OFFSET VOLTAGE (

µV)

–60

200

150

100

50

0

20

1001 TA02

–40

–20

0

40

60

954 UNITS

FROM THREE RUNS

Typical Distribution

of Offset Voltage

Linearized Platinum Resistance Thermometer

with

±0.025°C Accuracy Over 0 to 100°C

–

+

LT1001

–

+

LT1001

2

3

6

1k = 0

°C

10k*

1.2k**

LM129

+15

2

3

6

200

Ω

1001 TA01

LINEARITY

TRIM

GAIN

TRIM

OUTPUT

0 TO 10V =

0 TO 100

°C

1

µf

10k*

10k*

* ULTRONIX 105A WIREWOUND

** 1% FILM

118MF (ROSEMOUNT, INC.)

‡ Trim sequence: trim offset (0

°C = 1000.0Ω),

trim linearity (35

°C = 1138.7Ω), trim gain

(100

°C = 1392.6Ω). Repeat until all three

points are fixed with

±0.025°C.

90k*

20k

OFFSET TRIM

20k

330k*

1MEG.**

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