Datasheet ZHT431 (Diodes) - 2

ZHT431 Absolute Maximum Ratings
(Voltages to GND Unless Otherwise Stated.)
Parameter Rating Unit
Cathode Voltage (VZ) 20 V Cathode Current 150 mA Operating Temperature -55 to +125 °C Storage Temperature -55 to +150 °C Power Dissipation 330 mW (TA = +25°C, TJMAX = +150°C)
Recommended Operating Conditions Parameter Min Max Unit
Cathode Voltage VREF — 20 V Cathode Current 0.05 100 mA
Electrical Characteristics
(Test conditions unless otherwise specified: TA = +25°C.)
Values Symbol VParameter Unit Conditions Min. Typ. Max.
Reference Voltage 2% 2.45 2.50 2.55 VREF IL = 10mA (Fig.1), 1% 2.475 2.50 2.525 V VZ = VREF 0.5% 2.4875 2.50 2.5125 Deviation of Reference Input Voltage Over I V L = 10mA, VZ = VREF DEV — 10 30 mV Temperature TA = Full Range (Fig.1) ΔV VZ from VREF to 10V REF — -1.85 -2.7 mV/V Ratio of the Change in Reference Voltage to IZ = 10mA (Fig.2) ΔVZ the Change in Cathode Voltage V — Z from 10V to 20V -1.0 -2.0 mV/V IZ = 10mA (Fig.2) R1 = 10k, R2 = O/C, IREF Reference Input Current — 0.12 1.0 µA lL = 10mA (Fig.2) ΔI Deviation of Reference Input Current Over R1 = 10k, R2 = O/C, REF — 0.04 0.2 µA Temperature IL=10mA, TA = Full Range (Fig.2) IZMIN Minimum Cathode Current for Regulation — 35 50 µA VZ = VREF (Fig.1) IZOFF Off-state Current — — 0.1 µA VZ = 20V, VREF = 0V (Fig.3) V R Z = VREF (Fig.1), f = 0Hz, Z Dynamic Output Impedance — — 0.75 V 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: The dynamic output impedance, RZ, is defined as: 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: ZHT431 2 of 9 April 2018 Document number: DS32157 Rev. 12 - 2
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