A 6bit, 1.2GSps Low-Power Flash-ADC in 0.13$μ$m Digital CMOS

Details A 6bit, 1.2GSps Low-Power Flash-ADC in 0.13$μ$m Digital CMOS A 6bit, 1.2GSps Low-Power Flash-ADC in 0.13$μ$m Digital CMOS

2007-10-25

arxiv.org/abs/0710.4838v1

Dans Design, Automation and Test in Europe | Designers'Forum - DATE'05, Munich : Allemagne (2005)

Computer Science

Hardware Architecture

Submitted on behalf of EDAA (http://www.edaa.com/)

Scientific paper

A 6bit flash-ADC with 1.2GSps, wide analog bandwidth and low power, realized in a standard digital 0.13 $\mu$m CMOS copper technology is presented. Employing capacitive interpolation gives various advantages when designing for low power: no need for a reference resistor ladder, implicit sample-and-hold operation, no edge effects in the interpolation network (as compared to resistive interpolation), and a very low input capacitance of only 400fF, which leads to an easily drivable analog converter interface. Operating at 1.2GSps the ADC achieves an effective resolution bandwidth (ERBW) of 700MHz, while consuming 160mW of power. At 600MSps we achieve an ERBW of 600MHz with only 90mW power consumption, both from a 1.5V supply. This corresponds to outstanding Figure-of-Merit numbers (FoM) of 2.2 and 1.5pJ/convstep, respectively. The module area is 0.12mm^2.

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