Texas Instruments Introduces Converters for Precision Signal Acquisition

Texas Instruments Incorporated has announced two multi-channel, 16-bit, delta-sigma analog-to-digital converters (ADCs), which combine outstanding DC accuracy and AC performance with 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).



A selectable SPI or frame sync serial interface allows for convenient interfacing to DSPs, FPGAs and microcontrollers. Either interface supports daisy chaining to simplify readback of multiple ADS1174 or ADS1178 ADCs in high channel-count systems. The ADCs are fully specified over the industrial temperature range of -40C to +105C. Available in identical packages, the ADCs are drop-in compatible with the high-performance, 24-bit ADS1274 and ADS1278 for convenient upgrades. The ADS1174 and ADS1178 are available now in HTQFP-64 PowerPAD packages. The ADS1174 is priced at $12.45 each in 100-piece quantities (suggested resale pricing). The ADS1178 is priced at $19.95 each in 100-piece quantities (suggested resale pricing).