A 70dB DR 10b 0-to-80MS/s current-integrating SAR ADC with adaptive dynamic range

The constant demand for wireless systems pushes engineers and researchers to develop more innovative systems to improve performance. Remarkable improvements have been recently realized on charge-domain SAR ADCs to reach the speed of a few tens of MS/s with medium resolution and low power consumption [1,2]. This has shifted the power bottleneck to the preceding block in a wireless receiver, conventionally the Variable-Gain Amplifier (VGA) that has to charge a few pF of ADC sampling capacitor with rail-to-rail voltage within a few ns with 10b linearity.

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