1012 Ver la hoja de datos (PDF) - Linear Technology

Número de pieza

componentes Descripción

Fabricante

1012

Picoamp Input Current, Microvolt Offset, Low Noise Op Amp

Linear Technology 

LT1012A/LT1012

TYPICAL APPLICATIO

10V

REFERENCE

LT1021-10

R2

10M

100k

392k*

–15V

Kelvin-Sensed Platinum Temperature Sensor Amplifier

5k

235k*

5k*

ROSEMOUNT

78S

OR RS

EQUIVALENT

100Ω

AT

0°C

R1

182k

4.75k

6.65M RF*

654k

20V

2– 7

200k

6

LT1012

3+

4

R4

5k

10k

R3

1k

24.3k

VOUT = 100mV/°C

– 50°C TO 150°C

–15V

619k

* = WIRE WOUND RESISTORS

ALL OTHER RESISTORS ARE 1% METAL FILM

TRIM R2 AT 0°C FOR V0 = 0V

TRIM R3 AT 100°C FOR V0 = 10V

TRIM R4 AT 50°C FOR V0 = 5V

IN THE ORDER INDICATED

POSITIVE FEEDBACK (R1) LINEARIZES THE

INHERENT PARABOLIC NONLINEARITY OF

THE PLATINUM SENSOR AND REDUCES

ERRORS FROM 1.2°C TO 0.004°C OVER

THE – 50°C TO 150°C RANGE

LT1012A • TA04

20 Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408) 432-1900 q FAX: (408) 434-0507 q www.linear.com

sn1012 1012afbs

LW/TP 1202 1K REV B • PRINTED IN USA

© LINEAR TECHNOLOGY CORPORATION 1991

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