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A programmable 14-bit 1-GS/s current-steering digital-to-analog converter is presented.It features a selectable interpolation rate(2x/4x/8x) with a programmable interpolation filter.To improve the high-frequency performance,a “fast switching” technique that adds additional biasing to the current-switch is adopted.The datadependent clock loading effect is also minimized with an improved switch control by using a double latch.This DAC is implemented in 65 nra CMOS technology with an active area of 1.56 mm~2.The measured SFDRs are 70.05 dB at 250 MS/s for 120.65 MHz input sine-wave signal and 64.24 dB at 960 MS/s for 56.3 MHz input sine-wave signal,respectively.
A programmable 14-bit 1-GS / s current-steering digital-to-analog converter is presented. It features a selectable interpolation rate (2x / 4x / 8x) with a programmable interpolation filter. To improve the high-frequency performance, a “fast switching ” technique that adds additional biasing to the current-switch is adopted. The datadependent clock loading effect is also minimized with an improved switch control by using a double latch. This DAC is implemented in 65 nra CMOS technology with an active area of 1.56 mm ~ 2. The measured SFDRs are 70.05 dB at 250 MS / s for 120.65 MHz input sine-wave signal and 64.24 dB at 960 MS / s for 56.3 MHz input sine-wave signal, respectively.