AP431AVA View Datasheet(PDF) - Anachip Corporation
Part Name
Description
MFG CO.
'AP431AVA' PDF : 17 Pages View PDF
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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