ZHT2431
ABSOLUTE MAXIMUM RATING
15V
Power Dissipation (Tamb=25°C, Tjmax=150°C)
Cathode Voltage (VZ)
Cathode Current
SOT23
TO92
330mW
780mW
50mA
Operating Temperature
Storage Temperature
-55 to 125°C
-55 to 125°C
Recommended Operating Conditions
Cathode Voltage (min)VREF to (max) 15V
Cathode Current (min) 100µA to (max) 25mA
ELECTRICAL CHARACTERISTICS
TEST CONDITIONS (Unless otherwise stated):T
=25°C
amb
VALUE
PARAMETER
SYMBOL
UNITS CONDITIONS
MIN TYP MAX
1.21 1.24 1.27
Reference Voltage
2.5% Vref
V
IL=10mA (Fig1), VZ=Vref
Deviation of Reference Input Vdev
Voltage over Temperature
5.0 15.0 mV
IL=10mA, VZ=Vref
Ta=full range (Fig1)
Ratio of the change in
0.5 2.0 mV/V VZ from Vref to 10V
IZ=10mA (Fig2)
∆Vref
∆VZ
Reference Voltage to the
Change in Cathode Voltage
Reference Input Current
Iref
0.02 0.11 0.4
R1=10K, R2=O/C, lL=10mA
µA
µA
µA
(Fig2)
Deviation of Reference Input
Current over Temperature
0.02 0.2
R1=10K, R2=O/C, IL=10mA
Ta=full range (Fig2)
∆Iref
Minimum Cathode Current IZmin
for Regulation
30
100
Off-state Current
IZoff
RZ
10
30
2
VZ=15V, Vref =0V (Fig3)
µA
Dynamic Output
Impedance
0.25
VZ=Vref (Fig1), f=0Hz,
IL=10mA
Ω
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:
V
dev x 1000000
Vref (ppm⁄ °C)=
Vmax
Vref (T1−T2)
The dynamic output impedance, Rz, is defined
∆VZ
as:
RZ =
∆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:
Vmin
Vdev = Vmax - Vmin
R1
R =Rz 1+
R2
With a capacitance of greater than 100pF
between cathode and anode, minimum
cathode current must be 0.2mA.
T1
T2
Temperature
