CALCULATION AVERAGE TEMPERATURE COEFICIENT (TC)
ppm
%
0
0
5000
0.5
mV
0
∆VREF
∆T
-5
0 15 30 45 60 75 90 105
Junction Temperature (°C)
• TC in mV / °C = ∆VREF(mV)
∆TA
( ) • TC in % / °C =
∆VREF
∆VREF at 25°C
x 100
∆TA
( ) • TC in ppm / °C =
∆VREF
∆VREF at 25°C
x 106
∆TA
Figure 1. VREF VS Temperature.
0.0033mV /°C
0.0027% / °C
27ppm/°C
TEST CIRCUITS
VIN
IREF
VKA = VREF
VIN
VKA
VIN
IK
R1
IREF
IK
(VREF)
R2
VKA
IK (OFF)
Figure 2. Test Circuit for VKA = VREF Figure 3. Test Circuit for VKA > VREF Figure 4. Test Circuit for IKOFF
Date: 12/11/04
SPX432 1.24V Precision Adjustable Shunt Regulator
3
© Copyright 2004 Sipex Corporation