Adjustable Accurate Reference Source

FEATURES

The output voltage can be adjusted to 36V

Low dynamic output impedance ,its typical value is 0.2Ω

Trapping current capability is 1 to 100mA

The typical value of the equivalent temperature factor in the

whole temperature scope is 50 ppm/℃

The effective temperature compensation in the working

range of full temperature

Low output noise voltage

Fast on -state response

ABSOLUTE MAXIMUM RATINGS（Operating temperature range applies unless otherwise specified）

Parameter

SYMBOL

VALUE

UNITS

Cathode Voltage

37

V

Cathode Current Range (Continuous)

-100-+150

mA

Reference lnput Current Range

Iref

0.05-+10

mA

Power Dissipation

770

mW

Operating temperature

Topr

0-70

℃

Storage temperature Range

Tstg

-65-+150℃

℃

ELECTRICAL CHARACTERISTICS（Tamb=25℃

unless otherwise specified）

Parameter

Symbol

Test

conditions

MIN

TYP

MAX

UNIT

Reference lnput Voltage

2.475

2.5

2.525

V

Deviation of reference input Voltage

Over temperature (note)

△

Tmin≤Ta≤Tmax

4.5

17

mV

△

-1.0

-2.7

m V/V

Ratio Of Change in Reference lnput

Voltage to the change in Cathode

Voltage

△

△

=36V～ 10V

-0.5

-2.0

m V/V

Reference lnput Current

1.5

4

μ

A

Deviation Of Reference lnput Current

Over Full Temperature Range

△

0.4

1.2

μ

A

Minimum cathode current for

regulation

0.45

1.0

mA

Off-state cathode Current

0.05

1.0

μ

A

Dynamic lmpedance

f≤1.0KHz

0.15

0.5

Ω

Rank

Range

2.487-2.512

2.475-2.525

2.450-2.550

1 2 3

TO-92

1.REFERENCE

2.ANODE

3.CATHODE

http://www.weitron.com.tw

WEITRON

WT431

P b

Lead(Pb)-Free

1/2

01-Jun-09