N. Nambiar, C. Ulaganathan, S. Chen, M. Hale, A. Antonacci, B. Blalock, C. Britton, M. Ericson
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SiGe BiCMOS 12-bit 8-channel low power Wilkinson ADC
A multichannel low power analog-to-digital converter (ADC) designed, fabricated and tested in 0.5-mum Silicon Germanium BiCMOS process is reported. The 12-bit ADC features 8 input channels, each having a 10-Ksps sampling rate and an input voltage range of 1.2 V. The ADC architecture, comprised of a ramp generator, comparators, and a Gray code counter, is discussed along with design details of the primary blocks. Measurement data shows a differential nonlinearity of less than 0.5 LSB and an approximate accuracy of 10 bits.
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