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aSM121
- 4 -
© Andigilog, Inc. 2004
www.andigilog.com
July 2005 - 70A04006
Typical Performance Characteristics
Figure 2. aSM121 Current vs Temperature
Typical Applications
Figure 3. Serial Output Temperature to Digital Converter (Full Scale = +125˚C)
IN
10K
100K
FB
1.75V
REF
3.9K
SERIAL
DATA OUT
CLOCK
ENABLE
aSM121
3.3V
VTemp
U1
U2
U3
Serial
Analog-to-Digital
Converter
Adjustable
Shunt Voltage
Reference
+
-50
-25
0
25
0
75
100
125
Temperature (°C)
5
-50
-25
0
25
0
75
100
125
Temperature (°C)
5
-25
0
25
75
100
125
50
-25
0
25
75
100
125
Temperature (°C)
V DD =+3V
V DD =+3V
V DD =+3V
7
8
9
10
11
12
13
14
15
16
7
8
9
10
11
12
13
14
15
16
7
8
9
10
11
12
-50
-50
13
14
15
16
50
-50
-25
0
25
0
75
100
125
5
-50
-25
0
25
0
75
100
125
Temperature (°C)
5
-50
-25
0
25
0
75
100
125
5
-50
-25
0
25
0
75
100
125
Temperature (°C)
5
-25
0
25
75
100
125
50
-25
0
25
75
100
125
Temperature (°C)
V DD =+3V
V DD =+3V
V DD =+3V
V DD =+3V
V DD =+3V
V DD =+3V
7
8
9
10
11
12
13
14
15
16
7
8
9
10
11
12
13
14
15
16
7
8
9
10
11
12
-50
-50
13
14
15
16
50