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參數(shù)資料
| 型號： | AMS9491A |
| 廠商： | Advanced Monolithic Systems, Inc. |
| 英文描述： | 1.235V VOLTAGE REFERENCE |
| 中文描述： | 1.235V電壓基準 |
| 文件頁數(shù)： | 4/7頁 |
| 文件大小： | 75K |
| 代理商： | AMS9491A |
Advanced Monolithic Systems, Inc.
6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
AMS9491
TYPICAL APPLICATIONS
(Continued)
Centigrade Thermometer
Micropower* 10V Reference
AMS9491
V
+
V
-
R
R1
1k
V1
V2
LM334
90k
25k
27k
1.2k
2.3k
OUTPUT
1mV/° C
2.2k
1.5V
Calibration
1. Adjust R1 so that V1 = temp at 1mV/
°
K.
2. Adjust V2 to 273.2mV.
I
Q
for 1.3V to 1.6V battery voltage = 50
μ
A to 150
μ
A
150pF
AMS9491
3.5M
500k
22M
1M
7
4
6
3
2
-
+
V
IN
= 15V
I
Q
10V
LM4250C
8
*I
Q
20
μ
A standby current
Micropower Thermocouple Cold Junction Compensator
+
LM334
AMS9491
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
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AMS9491AN | 1.235V VOLTAGE REFERENCE |
| AMS9491AS | 1.235V VOLTAGE REFERENCE |
| AMS9491BN | 1.235V VOLTAGE REFERENCE |
| AMS9491BS | 1.235V VOLTAGE REFERENCE |
| AMSOP-07 | LOW OFFSET VOLTAGE OPERATIONAL AMPLIFIER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AMS9491AN | 制造商:ADMOS 制造商全稱:ADMOS 功能描述:1.235V VOLTAGE REFERENCE |
| AMS9491AS | 制造商:ADMOS 制造商全稱:ADMOS 功能描述:1.235V VOLTAGE REFERENCE |
| AMS9491B | 制造商:ADMOS 制造商全稱:ADMOS 功能描述:1.235V VOLTAGE REFERENCE |
| AMS9491BN | 制造商:ADMOS 制造商全稱:ADMOS 功能描述:1.235V VOLTAGE REFERENCE |
| AMS9491BS | 制造商:ADMOS 制造商全稱:ADMOS 功能描述:1.235V VOLTAGE REFERENCE |
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