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ZN458

GEC Plessey Semiconductors
Part Number ZN458
Manufacturer GEC Plessey Semiconductors
Description 2.45V Precision Reference Regulator
Published Jan 20, 2006
Detailed Description w w a D . w S a t e e h U 4 t m o .c THIS DOCUMENT IS FOR MAINTENANCE PURPOSES ONLY AND IS NOT RECOMMENDED FOR NE...
Datasheet PDF File ZN458 PDF File

ZN458
ZN458

Overview
w w a D .
w S a t e e h U 4 t m o .
c THIS DOCUMENT IS FOR MAINTENANCE PURPOSES ONLY AND IS NOT RECOMMENDED FOR NEW DESIGNS w w w t a .
D S a e h U 4 t e .
c m o w w w .
D a t a e h S 4 t e U m o .
c DS3025 - 2.
1 ZN458 2.
45V PRECISION REFERENCE REGULATOR The ZN458 is a monolithic integrated circuit providing a precise stable reference source of 2.
45V in a two lead package without the need for an external shaping capacitor.
+VE -VE FEATURES s s s s s s s s s Guaranteed 5mV Maximum Deviation over Full Temperature Range Low Temperature Coefficient 0.
003%/°C Low Slope Resistance - 0.
1 Ohms Very Good Long Term Stability - 10ppm Low Noise - 10 microvolts Internally Shaped Tight Tolerance ±1.
43% Two Pin Package Wide Operating Current 2-120mA VS VS - VREF R= IREF R VREF CM2 Fig.
1 Pin connection - bottom view ABSOLUTE MAXIMUM RATINGS Dissipation Operating temperature range Storage temperature range 300mW -20°C to +70°C -55°C to +150°C AV +VE ORDERING INFORMATION Device ZN458 ZN458A ZN458B TC (ppm/°C) 99 49 29 Temperature range -20°C to +70°C -20°C to +70°C -20°C to +70°C BAND GAP REFERENCE -VE GND Fig.
2 Circuit diagram ZN458 ELECTRICAL CHARACTERISTICS (at Tamb = 25°C unless otherwise specified) Parameter Output voltage Slope resistance Reference current Maximum change in VREF ZN458 ZN458A ZN458B RMS noise voltage 1Hz-10kHz VREF drift at 70°C Symbol VREF RREF IREF Min.
2.
42 2.
0 Typ.
2.
45 0.
1 10 6 4 10 ±10 Max.
2.
49 0.
2 120 22 11 6.
5 Units V Ω mA mV mV Test conditions Measured at 2mA ∆VREF -20 to +70°C µV ppm/1000 hours 10 DYNAMIC IMPEDANCE (ohms) IREF = 2mA 1.
0 IREF = 20mA 0.
1 0.
1 1.
0 FREQUENCY (kHz) 10 100 Fig.
3 Dynamic impedance 2 ZN458 10 8 CHANGE IN REFERENCE VOLTAGE, δV (mV) 10-1 FORWARD CURRENT (A) 6 4 2 0 -2 -4 ZN458 -6 -8 10-2 10-3 10-4 0.
4 0.
8 1.
2 1.
6 2.
0 2.
4 FORWARD VOLTAGE (V) 2.
8 -10 0 10 20 30 40 50 60 TEMPERATURE (°C) 70 80 Fig.
4 Forward characteristic Fig.
5 Temperature characteristic (typical) 5 4 CHA...


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