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Quad/Octal, Simultaneous Sampling, 16-Bit Analog-to-Digital Converters (Rev. A)
Texas Instruments

Description
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, and are also compatible with the high-performance 24-bit ADS1274 and ADS1278, permitting drop-in upgrades. 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 (2?V/C offset, 2ppm/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 (31mW/Ch at 52kSPS), and Low-power mode (7mW/Ch at 10kSPS). A SYNC
Features
Simultaneously Sample Four/Eight Channels Selectable Operating Modes: High-Speed: 52kSPS Data Rate, 31mW/ch Low-Power: 10kSPS Data Rate, 7mW/ch AC Performance: 25kHz Bandwidth 97dB SNR ?105dB THD DC Performance: 2?V/C Offset Drift 2ppm/C Gain Drift Digital Filter: Linear Phase Response Passband Ripple: 0.005dB Stop Band Attenuation: 100dB Selectable SPI? or Frame Sync Serial Interface Simple Pin-Driven Control Low Sampling Aperture Error Specified from ?40C to +105C Analog Supply: 5V I/O Supply: 1.8V to 3.3V Digital Core Supply: 1.8V APPLICATIONS 3-Phase Power Monitors Defibrillators and ECG Monitors Coriolis Flow Meters Vibration/Modal Analysis PowerPAD is a trademark of Texas Instruments. SPI is a trademark of Motorola, Inc. All other trademarks are the property of their respective owners.

Related Datasheets
Part Number Description Category
? ?ADS1112 ADS1112: 16-Bit Analog-to-Digital Conv with Input Multiplexer and Onboard Ref (Rev. D) Cards and Modules
? ?ADS1178 Quad/Octal, Simultaneous Sampling, 16-Bit Analog-to-Digital Converters (Rev. A) Cards and Modules
? ?ADS1274 Quad/Octal, Simultaneous Sampling, 24-Bit Analog-to-Digital Converters (Rev. A) Cards and Modules
? ?ADS1278 Quad/Octal, Simultaneous Sampling, 24-Bit Analog-to-Digital Converters (Rev. A) Cards and Modules
? ?ADS8328 Low Power 16-Bit 500-kHz, Single/Dual Unipolar Input ADC w/Serial I/F (Rev. B) Cards and Modules



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