12-bit High Speed Analog to Digital Converter

The WEAADC12BHS22G is a 12-bit Successive Approximation Analog-to-Digital Converter (ADC) that supports both single-ended and differential operation, depending on the input and reference connections. It integrates a split-capacitor DAC with a built-in track-and-hold circuit, a dynamic comparator with DC-offset autocalibration, SAR logic state machine, and pre/post-calibration logic. The device also includes gain and offset calibration mechanisms. Operating on a 0.8 V power supply, the WEAADC12BHS22G requires 13 clock cycles for conversion, in 12-bit resolution mode, with digital data available at the rising edge of the 14th clock pulse. The ADC can be clocked with a 13X clock (3.25 GHz). Its resolution is programmable from 8 to 12 bits, with the conversion rate increasing as the resolution decreases.

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