AD7899

a FEATURES Fast (2.2 ␮s) 14-Bit ADC 400 kSPS Throughput Rate 0.3 ␮s Track/Hold Acquisition Time Single Supply Operation Selection of Input Ranges: ؎10 V, ؎5 V and ؎2.5 V 0 V to 2.5 V and 0 V to 5 V High-Speed Parallel Interface which Also Allows Interfacing to 3 V Processors Low Power, 80 mW Typ Power-Saving Mode, 20 ␮W Typ Overvoltage Protection on Analog Inputs Power-Down Mode via STBY Pin 5 V Single Supply 14-Bit 400 kSPS ADC AD7899 STBY VINA VINB FUNCTIONAL BLOCK DIAGRAM AVDD VREF VDRIVE AD7899 6k⍀ + – 2.5V REFERENCE TRACK/HOLD SIGNAL SCALING 14-BIT ADC OUTPUT LATCH BUSY/EOC CONVERSION CONTROL LOGIC INT/EXT CLOCK SELECT INT CLOCK RD DB13 DB0 CS GENERAL DESCRIPTION The AD7899 is a fast, low-power, 14-bit A/D converter that operates from a single 5 V supply. The part contains a 2.2 µs successive-approximation ADC, a track/hold amplifier, 2.5 V reference, on-chip clock oscillator, signal conditioning circuitry, and a high-speed parallel interface. The ...