TI intros 4- and 8-channel 16-bit ADCs

BANGALORE, INDIA: Texas Instruments Inc. has announced two multi-channel, 16-bit, delta-sigma analog-to-digital converters (ADCs) which combine outstanding DC accuracy and AC performance with cost-effective integration.

The ADS1174 (4-channel) and ADS1178 (8-channel) provide a simultaneous-sampling measurement system for demanding signal acquisition applications, such as power metering, defibrillators and ECG monitors, as well as pressure sensors, coriolis flow meters and vibration/modal analysis.

The ADS1174 and ADS1178 feature 25kHz bandwidth, 2uV/°C offset drift and up to 97dB signal-to-noise ratio (SNR). Two operating modes allow for optimization of speed (52kSPS) or power dissipation (7mW/channel).

“Traditionally, industrial delta-sigma ADCs offering good drift performance use digital filters with large passband droop, resulting in limited signal bandwidth and mostly suited for DC measurements, said Apoorva Awasthy, Business Development Manager, High Performance Analog, Texas Instruments India.

“High-resolution ADCs for audio applications offer larger usable bandwidths, but the offset and drift specifications are significantly worse (and often unspecified) than their industrial counterparts. The ADS1174 and ADS1178 combine these two types of converters, allowing high-precision industrial measurements with excellent DC and AC specifications”, he added.