The AD689 monolithic voltage reference provides a fixed 8.192-volt output, operating with a range of excitation voltages from 10.8 to 36 V. This reference is principally intended for systems with a nominal 12-V ±10% supply; at the lower limit (12 V - 10% = 10.8 V), there is insufficient headroom for a 10-V reference to function. Read full article