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5_V_FROM_15_V

2015-03-22 02:07  
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5_V_FROM_15_V
Used as reference for A/D converter when reference voltage required is below that of zener, permitting simplified circuit design. Zener drift contributes proportionally to output temperature drift, while opamp offset drift contributes at greater rate. Opamp is unnecessary if high output impedance can be tolerated.-R. C. Dobkin, Don't Forget Reference Stability When Designing A-to-D Converters, EDN Magazine, June 20, 1977, p 105-108.