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.

• Supply Voltage (typ) : 0.8 V
• Resolution : 12 bits Conversion rate : 250 MSPS
• Resolution : 10 bits Conversion rate : 325 MSPS
• Vin : 0.25 V to 0.75 V
• Vin diff : 500 mV
• Vcm: 500 mV INL : -0.5 LSB (typ)
• DNL: ±0.8 LSB (typ)
• ENOB: 11
• Area : 725 x200 um
• ADCREF: 315 um x 200 um
• ADCREF_BUF: 185 um x 200 um
• ADCCORE: 220 um x 200 um
• PLL: 640 um x 320 um
• DLL: 640 um x 320 um