ZHT431C01STOB datasheet(3/12 Pages) ZETEX

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ZHT431

Issue 5 - October 2006

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Electrical characteristics test conditions (unless otherwise stated):Tamb=25°C

Deviation of reference input voltage, VDEV, is defined as the maximum variation of the reference

input voltage over the full temperature range.

The average temperature coefficient of the reference input voltage, VREF is defined as:

The dynamic output impedance, RZ, is defined as:

When the device is programmed with two externalresistors, R1

and R2, (fig 2) , the dynamic

outputimpedance of the overall

circuit, R’, is defined as:

Symbol Parameter

Value

Units Conditions

Min.

Typ.

Max.

VREF

Reference voltage

2.45

2.50

2.55

IL=10mA (Fig.1),

VZ=VREF

2.475

2.50

2.525

VDEV

Deviation of reference input

voltage over temperature

IL=10mA, VZ=VREF

Tamb=full range (Fig1)

Ratio of the change in

reference voltage to the

change in cathode voltage

-1.85

-2.7

mV/V VZ from VREF to 10V

IZ=10mA (Fig.2)

-1.0

-2.0

mv/V VZ from 10V to 20V

IZ=10mA (Fig.2)

IREF

Reference input current

0.12

1.0

R1=10k, R2=O/C,

lL=10mA (Fig.2)

IREF

Deviation of reference input

current over temperature

0.04

0.2

R1=10k, R2=O/C,

IL=10mA Tamb=full

range (Fig.2)

IZmin

Minimum cathode current

for regulation

AVZ=VREF (Fig.1)

IZoff

Off-state current

0.1

AVZ=20V, VREF=0V(Fig.3)

Dynamic output impedance

0.75

VZ=VREF (Fig.1), f=0Hz,

IC=1mA to 100mA

∆V

REF

∆V

-----------------

Vmax

Vmin

Vdev =Vmax -Vmin

Temperature

REF

ppm

°C

-------------⎠

⎞

⎝

⎛

DEV x 1000000

REF T1

–

()

------------------------------------------

∆V

∆I

----------

′

Z 1

-------

()

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