AMS1004-1.2AS Просмотр технического описания (PDF) - Advanced Monolithic Systems Inc

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AMS1004-1.2AS

MICROPOWER VOLTAGE REFERENCE

Advanced Monolithic Systems Inc 

PIN CONNECTIONS

TO-92

Plastic Package (N)

321

Bottom View

TYPICAL APPLICATIONS

Wide Input

Range Reference

VIN = 2.3V TO 30V

LM334

4.3k

AMS1004-1.2

OUT

1.24V

SO-8

SO Package (S)

+ N/C N/C N/C

8765

1234

N/C N/C N/C -

Top View

Micropower Reference

from 9V Battery

9V

500k

1.2V

AMS1004-1.2

AMS1004-1.2

SOT-89

(L)

321

N/C + -

Top View

Reference from

1.5V Battery

1.5V

3k

1.2V

AMS1004-1.2

Micropower Thermocouple Cold Junction Compensator

V+

LM334

5.1k

1M

1%

MERCURY

CELL

+

1.345V

V-

ZERO ADJ

100k

AMS1004-1.2

R2

R1

2k

R 1%

TC ADJ

500

+

THERMOCOUPLE

-

COLD JUNCTION

ISO THERMAL

WITH LM334

+

METER

-

Adjustment Procedure

1. Adjust TC ADJ pot until voltage across R1 equals Kelvin temperature

multiplied by the thermocouple Seebeck coefficient.

2. Adjust ZERO ADJ pot until voltage across R2 equals the thermocouple

Seebeck coefficient multiplied by 273.2.

Thermocouple

Type

Seebeck

Coefficient

(mV/ °C)

R1 R2 Voltage

Voltage

(Ω) (Ω) Across R1 Across R2

@ 25°C (mV) (mV)

J

52.3

523 1.24k 15.60

14.32

T

42.8

432 1k 12.77

11.78

K

40.8

412 953Ω 12.17

11.17

S

6.4

63.4 150Ω 1.908

1.766

Typical supply current 50µA

Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140

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