Low Voltage(1.24V) Adjustable Precision Shunt Regulator TL432/A/C
αVREF can be positive or negative, depending on whether minimum VREF or maximum VREF, respectively, occurs at
the lower temperature.
Example: Maximum VREF=1190mV at 30℃, maximum VREF=1262mV at 0℃, VREF=1241mV at 25℃,
ΔTA=125℃ for TL432C.
( 72mV )×106
αVREF
=
1241mV
125℃
≈ 46ppm/ ℃
Because minimum VREF occurs at the lower temperature, the coefficient is positive.
Calculating Dynamic Impedance
The dynamic impedance is defined as :
Z KA
= ΔVKA
ΔIKA
When the device is operating with two external resistors, the total dynamic impedance of the circuit is given by:
Z'
ΔV
=
ΔI
≈ Z KA
(1 + R1/ R 2)
Sep. 2010 – Rev.1.5
-6-
HTC