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| Obsolescence Notice This product is obsolete. This information is available for your convenience only. For more information on Zarlink's obsolete products and replacement product lists, please visit http://products.zarlink.com/obsolete_products/ DS3030 - 2.1 ZN404 / ZN404D 2.45V PRECISION REFERENCE REGULATOR The ZN404 is a monolithic integrated circuit providing a precise stable reference source of 2.45V without the need for an external shaping capacitor. FEATURES s s s s s s s s Low Temperature Coefficient Low Slope Resistance Very Good Long Term Stability Low Noise Internally Shaped Tight Tolerance ZN404 - 2-Lead TO-18 Metal Can Package ZN404D - 8-Lead Miniature Plastic Surface Mount Package VREF GND ZN404 (CM2) - BOTTOM VIEW NC NC NC GND VS VS - VREF R= IREF +VE R VREF 1 2 3 4 8 7 6 5 VREF NC NC NC ZN404D (MP8) - TOP VIEW Fig.1 Pin connections AV ORDERING INFORMATION Device ZN404 Operating Temperature -20C to +70C -20C to +70C Package CM2 MP8 BAND GAP REFERENCE -VE GND ZN404D ABSOLUTE MAXIMUM RATINGS Dissipation Operating temperature range ZN404 ZN404D Storage temperature range 300mW -20C to +70C -20C to +70C -55C to +125C Fig.2 Circuit diagram ZN404 ELECTRICAL CHARACTERISTICS (at Tamb = 25C unless otherwise specified) Parameter Output voltage Slope resistance Reference current Maximum change in VREF RMS noise voltage 1Hz-10kHz VREF drift at 70C Symbol VREF RREF IREF VREF Min. 2.38 2.0 Typ. 2.45 0.1 6 10 10 Max. 2.52 0.2 120 33 Units V mA mV V ppm/1000 hours -20 to +70C 1kHz - 10kHz CM2 Package Test conditions Measured at 2mA 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 ZN404 10 8 CHANGE IN REFERENCE VOLTAGE, V (mV) 10-1 FORWARD CURRENT (A) 6 4 2 0 -2 -4 -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 (typical) Fig.5 Temperature characteristic (typical) 140 120 100 80 75 60 IREF (MAX) (mA) 40 20 0 0 10 20 25 30 40 50 60 70 AMBIENT TEMPERATURE (C) Fig.6 Derating curve 3 |
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