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參數(shù)資料
| 型號(hào)： | AMS3100-25CM |
| 廠商： | Advanced Monolithic Systems, Inc. |
| 英文描述： | MICROPOWER VOLTAGE REFERENCE |
| 中文描述： | 微功耗電壓參考 |
| 文件頁(yè)數(shù)： | 4/6頁(yè) |
| 文件大?。?/td> | 68K |
| 代理商： | AMS3100-25CM |
Advanced Monolithic Systems, Inc.
6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
AMS3100-1.2
TYPICAL APPLICATIONS
(Continued)
Micropower Thermocouple Cold Junction Compensator
+
LM334
AMS3100-1.2
R1
R2
ZERO
ADJ 100k
1M
1%
5.1k
2k
1%
TC ADJ
500
METER
MERCURY
CELL
1.345V
+
-
V
+
V
-
R
THERMOCOUPLE
+
-
COLD JUNCTION
ISO THERMAL
WITH LM334
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 Seebeck R1 R2 Voltage Voltage
Type Coefficient (
) (
) Across R1 Across R2
(mV/
°
C)
@
25
°
C (mV) (mV)
J 52.3 523
1.24k 15.60 14.32
T 42.8 432 1k 12.77 11.78
K 40.8 408 953
12.17 11.17
S 6.4 63.4 150
1.908 1.766
Typical supply current 50
μ
A
Precision 1
μ
A to 1mA Current Sources
7
4
3
2
+
-
LM312
6
AMS3100-1.2
R2
R1
100k
-30V
-1.5V TO -27V
C1
150pF
I
OUT
*
*I
OUT
=1.23V/R2
7
4
3
2
+
-
LM312
6
R2
R1
100k
30V
1.5V TO 27V
C1
150pF
I
OUT
*
AMS3100-1.2
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