ZH431 View Datasheet(PDF) - Unspecified
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ZH431 Datasheet PDF : 7 Pages
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ZH431
ABSOLUTE MAXIMUM RATING
Cathode Voltage (VZ)
Cathode Current
40V
50mA
Operating Temperature -40 to 85°C
Storage Temperature
-55 to 125°C
Recommended Operating Conditions
Min Max
Cathode Voltage
Vref 36V
Cathode Current
50µA 30mA
Power Dissipation (Tamb=25°C, Tjmax=150°C)
SOT23
330mW
TO92
780mW
SOT223
2W
SO8
780mW
SOT89
1.5W
ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise
stated):Tamb=25°C
PARAMETER
VALUE
SYMBOL
MIN
TYP
MAX UNITS
CONDITIONS
Reference Voltage
2% Vref
1%
2.45 2.50 2.55 V
2.475 2.50 2.525
IL=10mA (Fig1), VZ=Vref
Deviation of Reference
Input Voltage over
Temperature
Vdev
8.0 17 mV
IL=10mA, VZ=Vref
Ta=full range (Fig1)
Ratio of the change in
Reference Voltage to the
Change in Cathode
Voltage
Reference Input Current
∆Vref
∆VZ
Iref
-0.7 -2.7
-0.6 -2.0
0.15 1.0
mV/V
mV/V
µA
VZ from Vref to 10V
IZ=10mA (Fig2)
VZ from 10V to 36V
IZ=10mA (Fig2)
R1=10k, R2=O/C, lL=10mA (Fig2)
Deviation of Reference
∆Iref
Input Current over
Temperature
0.06 0.2 µA
R1=10k, R2=O/C, IL=10mA
Ta=full range (Fig2)
Minimum Cathode
Current for Regulation
IZmin
21 50 µA
VZ=Vref (Fig1)
Dynamic Output Impedance RZ
0.75 Ω
VZ=Vref (Fig1), f=0Hz
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:
Vmax
Vmin
Vdev = Vmax - Vmin
Vref
(ppm ⁄
°C)=
Vdev x 1000000
Vref (T1−T2)
The dynamic output impedance, Rz, is defined as:
RZ
=
∆VZ
∆IZ
When the device is programmed with two external
resistors, R1 and R2, (fig 2) , the dynamic output
impedance of the overall circuit, R’, is defined as:
R’=Rz (1+RR12)
T1
Temperature
T2
4-16
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