ADS1271IPW | Texas Instruments

Analog-to-digital Converter, ADS1271IPW, Texas Instruments

The ADS1271IPW is a 24-bit, delta-sigma analog-to-digital converter (ADC) with a data rate up to 105kSPS. It offers a unique combination of excellent DC accuracy and outstanding AC performance. The high-order, chopper-stabilized modulator achieves very low drift with low in-band noise. The onboard decimation filter suppresses modulator and signal out-of-band noise. The ADS1271IPW provides a usable signal bandwidth up to 90% of the Nyquist rate with less than 0.005dB of ripple. Traditionally, industrial delta-sigma ADC is offering good drift performance and uses digital filter with large passband droop. As a result, it has limited signal bandwidth and is mostly suited for DC measurement. High-resolution ADC in audio application offers larger usable bandwidth, but the offset and drift specification is significantly weaker than its industrial counterpart.

The ADS1271IPW combines these converters, allowing high-precision industrial measurement with excellent DC and AC specification ensured over an extended industrial temperature range. Three operating modes allow for optimization of speed, resolution, and power. A selectable SPI or a frame-sync serial interface provides for convenient interfacing to microcontroller or DSP. The output from the modulator is accessible for external digital filter application. All operations, including internal offset calibration, are controlled directly by pins; there is no register to program.

Features

• Power-down control
• Internal offset calibration on command
• Simple Pin-Driven Control
• Modulator output option

Applications

• Vibration/Modal Analysis
• Acoustics
• Dynamic Strain Gauges
• Pressure Sensors
• Test and Measurement