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A431B Datasheet(PDF) 3 Page - AUK corp

Part # A431B
Description  Programmable Voltage Reference
Download  6 Pages
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Manufacturer  AUK [AUK corp]
Direct Link  https:www.auk.co.kr
Logo AUK - AUK corp

A431B Datasheet(HTML) 3 Page - AUK corp

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KSD-I0A003-000
3
A431x
1
ref
2
1
ref
KA
R
×
I
+
)
R
R
+
1
(
×
V
=
V
Note.
1. Ambient temperature range: TLOW = 0℃, THigh = 70℃
2. The deviation parameters △Vref and △Iref are defined as the difference between the maximum value and minimum value
obtained over the full operating ambient temperature range that applied.
The average temperature coefficient of the reference input voltage,
ref
V
α
is defined as:
T
)
10
×
)
25
=
T
(
V
V
(
=
)
ppm
(
V
α
a
6
a
ref
ref
ref
ref
V
α
can be positive or negative depending on whether Vref Min or Vref Max occurs at the lower ambient temperature, refer to
Fig. 8
Example : △Vref = 30mV and the slope is positive,
Vref @ 25℃ = 2.495V
Ta = 70℃
3. The dynamic impedance ZKA is defined as:
K
KA
KA
I
V
=
Ζ
When the device is operating with two external resistors, R1 and R2, (refer to Fig.2) the total dynamic impedance of the circuit
is given by:
)
R
R
+
1
(
×
Ζ
=
Ζ
2
1
KA
'
KA
Fig. 1 Test circuit for VKA=Vref
Fig. 2 Test circuit for VKA>Vref
Fig. 3 Test circuit for IK(off)
KA
Input
R1
R2
V
IK(off)
Iref
Vref
IK
KA
V
Input
IK
∆Vref = Vref Max – Vref Min
∆Ta = T2 – T1
Ambient Temperature
KA
V
Input
/
ppm
171
=
70
10
×
)
495
.
2
03
.
0
(
=
)
ppm
(
V
α
6
ref


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