TL432-CSF datasheet(5/5 Pages) HTC

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Low Voltage(1.24V) Adjustable Precision Shunt Regulator

TL432/ A / C

The deviation parameters VREF(DEV) and IREF(DEF) are defined as the differences between the maximum and minimum

values obtained over the recommended temperature range. The average full-range temperature coefficient of the

reference voltage, αV REF, is defined as :

Where :

ΔTA is the recommended operating free-air temperature range of the device.

αVREF can be positive or negative, depending on whether minimum V REF or maximum VREF, respectively, occurs at the

lower temperature.

Example : Maximum VREF=1190㎷ at 30℃, maximum VREF=1262㎷ at 0℃, VREF=1241㎷ at 25℃, ΔTA=125℃

for TL431C

Because minimum VREF occurs at the lower temperature, the coefficient is positive.

Calculating Dynamic Impedance

The dynamic impedance is defined as :

When the device is operating with two external resistors (see Figure 3), the total dynamic impedance of the circuit

is given by :

Jan, 2004 - Rev 01

HTC

125℃

7.2㎷

1241㎷

x10

）

（

｜αVREF｜=

~ 46PPM/℃

x10

VI(dev)

VREFat 25℃

）

（

｜αVREF｜

ΔTA

ppm

℃

）

（

ΔV

ΔI

（1+

）

｜Z'｜=

~｜ZKA｜

ΔVKA

ΔIKA

｜ZKA｜=

ΔTA

VI(dev)

Maximum VREF

Minimum VREF

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