AMS1004-1.2 ADMOS [Advanced Monolithic Systems], AMS1004-1.2 Datasheet - Page 3

• Manufacturer Part Number: AMS1004-1.2
• Description: MICROPOWER VOLTAGE REFERENCE
• Manufacturer: ADMOS [Advanced Monolithic Systems]

PIN CONNECTIONS
TYPICAL APPLICATIONS
Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone [phone] Fax [phone]
MERCURY
THERMOCOUPLE
1.345V
CELL
Micropower Thermocouple Cold Junction Compensator
Plastic Package (N)
+
Range Reference
Bottom View
5.1k
Wide Input
V
3
TO-92
AMS1004-1.2
+
-
IN
= 2.3V TO 30V
COLD JUNCTION
2
LM334
ISO THERMAL
WITH LM334
1M
1%
1
AMS1004-1.2
ZERO ADJ
100k
R2
V
4.3k
+
OUT
1.24V
LM334
+
-
METER
V
R1
-
R
2k
1%
TC ADJ
500
Micropower Reference
SO Package (S)
from 9V Battery
N/C N/C N/C
+
8
1
Top View
9V
AMS1004-1.2
N/C
500k
SO-8
7
2
1.2V
N/C N/C
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
Typical supply current 50 A
6
3
Type
5
4
-
J
T
K
S
Coefficient
Seebeck
(mV/ C)
52.3
42.8
40.8
6.4
63.4
( )
523
432
412
R1
AMS1004-1.2
1.24k
( ) Across R1
Reference from
953
150
R2
1k
N/C
1.5V Battery
1.5V
Top View
3
SOT-89
3k
AMS1004-1.2
@ 25 C (mV)
(L)
Voltage
2
+
1.2V
12.17
12.77
1.908
15.60
1
-
Across R2
Voltage
11.17
11.78
1.766
14.32
(mV)