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AMS9491AS Datasheet(PDF) 3 Page - Advanced Monolithic Systems

Part # AMS9491AS
Description  1.235V VOLTAGE REFERENCE
Download  7 Pages
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Manufacturer  ADMOS [Advanced Monolithic Systems]
Direct Link  http://www.advanced-monolithic.com
Logo ADMOS - Advanced Monolithic Systems

AMS9491AS Datasheet(HTML) 3 Page - Advanced Monolithic Systems

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Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
Fax (925) 443-0723
AMS9491
TYPICAL APPLICATIONS
Wide Input
Micropower Reference
Reference from
Range Reference
from 9V Battery
1.5V Battery
4.3k
LM334
OUT
1.24V
AMS9491
V
IN = 2.3V TO 30V
AMS9491
1.2V
500k
9V
AMS9491
1.2V
3k
1.5V
0
°C - 100°C Thermometer
Lower Power Thermometer
0
°C - 100°C Thermometer
AMS9491
150
R1
4k
R2
1k
R3
100
R4
220
1.5V
(1.3-1.6V)†
R
V-
V+
LM334
M
0-100
µA
I
OUT
Calibration
1. Short AMS9491, adjust R3 for IOUT = temp at
1
µA/°K
2. Remove short, adjust R2 for correct reading in
°C
† I
Q at 1.3V ≅ 500 µA
IQ at 1.6V ≅ 2.4mA
LM334
M
AMS9491
1.3 TO
1.6V‡
*
8k TO
12k†
* 2N3638 or 2N2907 select for inverse HFE ≅ 5
† Select for operation at 1.3V
‡ I
Q ≅ 600µA to 900 µA
AMS9491
150
R1
2k
R2
1k
R3
50
R4
100
1.3-1.6V
R
V-
V+
LM334
M
0-50
µA
I
OUT
Calibration
1. Short AMS9491, adjust R3 for IOUT = temp at
1.8
µA/°K
2. Remove short, adjust R2 for correct reading in
°F


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