AP431A データシートの表示（PDF） - Anachip Corporation

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AP431A

Adjustable Precision Shunt Regulator

Anachip Corporation 

Adjustable Precision Shunt Regulator

AP431/AP431A

Note 3. Deviation of reference input voltage, VDEV, is defined as the maximum variation of the reference over

the full temperature range.

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

( VDEV ) ⋅10 6

α VREF =

VREF (25°C)

T2 − T1

……………………..………………..

(

ppm

°C

)

Where:

T2 – T1 = full temperature change.

αVREF can be positive or negative depending on whether the slope is positive or negative.

Note 4. The dynamic output impedance, RZ, is defined as:

Z KA

= ∆VKA

∆ IKA

When the device is programmed with two external resistors R1 and R2 (see Figure 2.), the dynamic output

impedance of the overall circuit, is defined as:

ZKA '

=

∆v

∆i

≈ZKA

(1+ R1)

R2

„ Test Circuits

Input

IN

IN

VKA

IKA

VREF

IKA

VKA

R1

IREF

R2

VREF

VKA

IZ(OFF)

Fig1. Test Circuit for VKA= VREF

Note:VKA=VREF(1+R1/R2)+IREF× R1

Fig2. Test circuit for VKA＞VREF Fig3. Test Circuit for off-state Current

Anachip Corp.

www.anachip.com.tw

Rev.1.0 May.7, 2004

5/17

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