AMS1004-1.2
TYPICAL APPLICATIONS
(Continued)
0°C - 100°C Thermometer
°
°
Lower Power Thermometer
0°C - 100°C Thermometer
°
°
*
150
M
1.3 TO
1.6V‡
150
0-100µA M
I
OUT
R1
4k
R2
1k
R
AMS1004-1.2
R3
100
R4
220
LM334
8k TO
12k†
AMS1004-1.2
0-50µA
I
OUT
M
R1
2k
R2
1k
R
AMS1004-1.2
R3
50
R4
100
V
+
LM334
V
-
1.5V
(1.3-1.6V)†
V
+
LM334
V
-
1.3-1.6V
* 2N3638 or 2N2907 select for inverse H
FE
≅
5
†
Select for operation at 1.3V
‡
I
Q
≅
600µA to 900
µA
Calibration
1. Short AMS1004-1.2, adjust R3 for I
OUT
= temp at
1µA/°K
2. Remove short, adjust R2 for correct reading in
°C
†
I
Q
at 1.3V
≅
500
µA
I
Q
at 1.6V
≅
2.4mA
Calibration
1. Short AMS1004-1.2, adjust R3 for I
OUT
= temp at
1.8µA/°K
2. Remove short, adjust R2 for correct reading in
°F
Centigrade Thermometer
Micropower* 10V Reference
I
Q
V
IN
= 15V
2.2k
V
+
LM334
V
-
1.5V†
R
2.3k
V1
V2
90k
25k
1M
2
+
7
LM4250C
3
1.2k
27k
AMS1004-1.2
8
-
4
22M
150pF
3.5M
6
10V
OUTPUT
1mV/° C
R1
1k
AMS1004-1.2
500k
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 = 50µA to 150µA
*I
Q
≅
20µA standby current
Advanced Monolithic Systems, Inc.
6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
ADMOS [ ADVANCED MONOLITHIC SYSTEMS ]
