AP431/AP431A
ADJUSTABLE PRECISION SHUNT REGULATOR
Typical Performance Characteristics
Cathode Current vs Cathode Voltage
Cathode Current (uA) vs Cathode Voltage
100
600
400
200
VKA =Vref
Ta=25oC
VKA =Vref
Ta=25oC
0
0
-100
-200
-1.5
-0.5
0.5
Cathode Voltage (v)
1.5
2.5
-1
-0.5
0
0.5
1
1.5
2
2.5
Cathode Voltage(v)
Reference Voltage vs Free-Air Temperature
Reference Input Current vs Free Temperature
2
2500
R1=10K
1.8
IKA=10mA
2495
2490
2485
2480
1.6
1.4
1.2
1
-40 -30 -20 -10
0
10 20 30 40 50 60 70 80
-50
-25
0
25
50
75
100
125
Free-Air Temperature (oC)
o
Free-Air Temperature (
C)
Change in Reference Voltage vs Cathode Voltage
0
-2
IKA=10mA
-4
Ta=25oC
-6
-8
-10
-12
0
5
10
15
20
25
30
Cathode Voltage (V)
AP431/AP431A Rev. 5
7 of 14
MARCH 2007
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