43C View Datasheet(PDF) - Zetex => Diodes
Part Name
Description
MFG CO.
'43C' PDF : 12 Pages View PDF
ZHT431
Electrical characteristics test conditions (unless otherwise stated):Tamb=25°C
Symbol Parameter
Min.
VREF
Reference voltage
2% 2.45
1% 2.475
VDEV
Deviation of reference input
voltage over temperature
∆-----V----R---E---F-
∆VZ
Ratio of the change in
reference voltage to the
change in cathode voltage
IREF
⌬IREF
Reference input current
Deviation of reference input
current over temperature
IZmin
IZoff
RZ
Minimum cathode current
for regulation
Off-state current
Dynamic output impedance
Value
Typ.
2.50
2.50
10
-1.85
-1.0
0.12
0.04
35
Max.
2.55
2.525
30
-2.7
-2.0
1.0
0.2
50
0.1
0.75
Units Conditions
V IL=10mA (Fig.1),
V VZ=VREF
mV IL=10mA, VZ=VREF
Tamb=full range (Fig1)
mV/V VZ from VREF to 10V
IZ=10mA (Fig.2)
mv/V VZ from 10V to 20V
IZ=10mA (Fig.2)
A R1=10k, R2=O/C,
lL=10mA (Fig.2)
A R1=10k, R2=O/C,
IL=10mA Tamb=full
range (Fig.2)
A VZ=VREF (Fig.1)
A VZ=20V, VREF=0V(Fig.3)
⍀ VZ=VREF (Fig.1), f=0Hz,
IC=1mA to 100mA
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:
VR
E
F
⎛
⎝
p----°-p--C--m----⎠⎞
=
-V----D----E---V-----x----1---0---0----0---0----0---0
VREF (T1 – T2)
Vmax
The dynamic output impedance, RZ, is defined as:
RZ
=
∆-----V---Z-
∆IZ
Vmin
When the device is programmed with two externalresistors, R1
Vdev = Vmax - Vmin
and R2, (fig 2) , the dynamic outputimpedance of the overall
circuit, R’, is defined as:
R′
=
RZ
(
1
+
R-----1--
R2
)
T1
T2
Temperature
Issue 5 - October 2006
3
© Zetex Semiconductors plc 2006
www.zetex.com
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