THIS DOCUMENT IS FOR MAINTENANCE PURPOSES ONLY AND IS NOT RECOMMENDED FOR NEW DESIGNS
DS2347 - 3.0
ZN423
PRECISION VOL...
THIS DOCUMENT IS FOR MAINTENANCE PURPOSES ONLY AND IS NOT RECOMMENDED FOR NEW DESIGNS
DS2347 - 3.0
ZN423
PRECISION
VOLTAGE REFERENCE SOURCE
The ZN423 is a monolithic integrated circuit using the energy bandgap
voltage of a base-emitter junction to produce a precise, stable, reference source of 1.26V. This is derived via an external dropping resistor for supply
voltages of 1.5V upwards. The temperature coefficient of the ZN423, unlike conventional Zener diodes, remains constant with reference current. the noise figure associated with breakdown mechanisms is also considerably reduced.
FEATURES
s s s s s s s s Low
Voltage Low Temperature Coefficient Very Good Long Term Stability Low Slope Resistance Low RMS Noise Tight Tolerance High Power Supply Rejection Ratio 2-Lead TO-18 Metal Can Package ZN423 (CM-2)
Fig.1 Pin connections (bottom view)
ABSOLUTE MAXIMUM RATINGS
Reference current, IREF Operating temperature range: Storage temperature range: 20mA -55°C to +125°C -65°C to +165°C
ORDERING INFORMATION
Device Type ZN423 Operating Temperature -55°C to +125°C Package CM2
Fig.2 Circuit diagram
ELECTRICAL CHARACTERISTICS
Test conditions (unless otherwise stated): Tamb = 25°C, Shaping capacitor, CS = 0.1µF Value Characteristic Symbol Min. Output
voltage Slope resistance Reference current Temperature coefficient External resistor RMS noise
voltage Power supply ratio VREF RREF IREF REXT PSRR 1.2 1.5 30 100 6 60 Typ. 1.26 0.5 Max. 1.32 1.5 12 V Ω mA Unit Conditions
IREF = 5mA
ppm...