.
MAX184 - High-Speed 12-Bit A/D Converters With External Refernce input
ZR285 - PRECISION 2.5V MICROPOWER VOLTAGE REFERNCE
MAX182 - Calivrated 4-Channel 12-Bit ADC with T/H and Refernce
MAX183 - High-Speed 12-Bit A/D Converters With External Refernce input