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