ADC Quad Delta-Sigma 52ksps 16-bit Serial 64-Pin HTQFP EP T/R

The ADS1174 (quad) and ADS1178 (octal) are multiple delta-sigma (?S) 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 (2µV/°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), andLow-power mode (7mW/Ch at 10kSPS).A SYNC\ input control pin allows the device conversions to be started and synchronized to an external event. SPI and Frame-Sync serial interfaces are supported. The device is fully specified over the extended industrial range (40°C to +105°C) and is available in an HTQFP-64 PowerPAD package.

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:
2µV/°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 -40°C to +105°C

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