“Previously, customers seeking a buffer for differential precision ADCs could choose between a single-ended amplifier solution requiring complex interface circuits or a higher power fully differential amplifier,” said Art George, senior vice president of TI’s High-Performance Analog business unit.
“The THS452x provides an alternative that reduces the number of amplifiers to save board space and alleviates amplifier and circuit matching concerns while minimizing power consumption.”
The THS452x devices enable customers to drive differential ADCs, including TI’s ADS8317 16-bit, 250-kSPS SAR converter and ADS1278 24-bit, 128-kSPS delta-sigma converter, and achieve specified data sheet performance levels. For instance, using the THS4521 to buffer the ADS1278, at 10-kHz input achieves 102-dB signal-to-noise ratio (SNR) and 110-dBc spurious free dynamic range (SFDR) with very low quiescent current, which reduces system power consumption.