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An 8mW 10b 50MS/s pipelined ADC using 25dB opamp

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6 Author(s)
Min Gyu Kim ; Broadcom Corporation, Irvine, CA 92617, USA ; Volodymyr Kratyuk ; Pavan Kumar Hanumolu ; Gil-Cho Ahn
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In 10-bit 50 MS/s pipelined ADC is presented. A 25 dB open loop dc gain amplifier is employed in the MDAC operation. The low opamp dc gain in the extreme is tolerated due to the use of a reference scaling scheme in conjunction with a background offset calibration. An intermediate gain stage is inserted into the pipeline to compensate for the accumulated reduction of reference and signal swing. The prototype IC implemented in a 90 nm CMOS process achieves -63.2 dB THD, 48.8 dB SNR, and 48.6 dB SNDR, while consuming 8 mW from a 1 V supply.

Published in:

Solid-State Circuits Conference, 2008. A-SSCC '08. IEEE Asian

Date of Conference:

3-5 Nov. 2008