AD7892 Datasheet | Analog Devices

FEATURES Fast 12-Bit ADC with 1.47 ␮ s Conversion Time 600 k SPS Throughput Rate (AD7892-3) 500 k SPS Throughput Rate (AD7892-1, AD7892-2) Single Supply Operation On-Chip Track/Hold Amplifier Selection of Input Ranges: ؎10 V or ؎5 V for AD7892-1 0 V to +2.5 V for AD7892-2 ؎2.5 V for AD7892-3 High Speed Serial and Parallel Interface Low Power, 60 m W typ Overvoltage Protection on Analog Inputs (AD7892-1 and AD7892-3) 2k⍀ LC2MOS Single Supply, 12-Bit 600 k SPS ADC AD7892 FUNCTIONAL BLOCK DIAGRAM REF OUT/REF IN VDD +2.5V REFERENCE DB0 DB2 DB3/RFS 12-BIT VIN1 VIN2 ADC SIGNAL SCALING TRACK/HOLD CLOCK CONTROL LOGIC DB4/SCLK DB5/SDATA DB10/LOW DB11/LOW MODE EOC CONVST AGND DGND STANDBY GENERAL DESCRIPTION The AD7892 is a high speed, low power, 12-bit A/D converter that operates from a single +5 V supply. The part contains a 1.47 µs successive approximation ADC, an on-chip track/hold amplifier, an internal +2.5 V reference and on-chip versatile interface structures that allow both serial and parallel connection to a microprocessor. The part accepts an analog input range of ± 10 V or ± 5 V (AD7892-1), 0 V to +2.5 V (AD7892-2) and ± 2.5 V (AD7892-3). Overvoltage protection on the analog inputs for the AD7892-1 and AD7892-3 allows the input voltage to go to ± 17 V or ± 7 V respectively without damaging the ports. The AD7892 offers a choice of two data output formats: a single, parallel, 12-bit word or serial data. Fast bus access times and standard control inputs ensure easy parallel interface to microprocessors and digital signal processors. A high speed serial interface allows direct connection to the serial ports of microcontrollers and digital signal processors. In addition to the traditional dc accuracy specifications such as linearity, full-scale and offset errors, the part is also specified for dynamic performance parameters including harmonic distortion and signal-to-noise ratio. The AD7892 is fabricated in Analog Devices’ Linear patible CMOS...