Octal, Simultaneous Sampling, 16-Bit Analog-to-Digitalconverter
The ADS1174 (quad) and ADS1178 (octal) are multiple delta-sigma () Analog-to-digital converters (ADCs) with data rates up to 52k samples-per-second (SPS), which allow synchronous sampling of four and eight channels. These devices use identical packages, permitting drop-in expandability.
The delta-sigma architecture offers near ideal 16-bit ac performance (97dB SNR, -105dB THD, 1LSB linearity) combined with 0.005dB passband ripple, and linear phase response.
The high-order, chopper- stabilized Modulator achieves very low drift (4V/C offset, 4ppm/C gain) and low noise (1LSBPP). The on-chip finite impulse response (FIR) Filter provides a usable signal bandwidth up to 90% of the Nyquist rate with 100dB of stop band attenuation while suppressing Modulator and signal out-of-band noise.
Two operating modes allow for optimization of speed and power: High-speed mode (32mW/Ch at 52kSPS), and Low-power mode (8mW/Ch at 10kSPS).
By Texas Instruments
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