Driving a low noise, low distortion 18-bit, 1.6Msps ADC
Guy Hoover
Abstract
Two circuits for driving the LTC2379-18, a low noise, low distortion 18-bit, 1.6Msps ADC, are described.
Keywords
SAR ADC
LTC2379-18
Introduction
The LTC2379-18 is an 18-bit, 1.6Msps SAR ADC with an extremely high SNR of 101dB and THD of −120dB. It also features a unique digital-gain compression function, which eliminates the need for a negative supply in the ADC driver circuit.
Designing a driver circuit to get the best possible performance from the LTC2379-18 is not difficult. The two circuits presented here demonstrate differential and single-ended solutions using dual and single supplies. Note that the components used here have been carefully ...
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