Overview
The ADS1271IPWG4, produced by Texas Instruments, is a 24-bit delta-sigma analog-to-digital converter (ADC) designed for high-precision industrial and measurement applications. It offers a unique combination of excellent DC accuracy and outstanding AC performance. The ADC features a high-order, chopper-stabilized modulator that achieves very low drift and low in-band noise. The onboard decimation filter suppresses modulator and signal out-of-band noise, providing a usable signal bandwidth up to 90% of the Nyquist rate with less than 0.005dB of ripple.
Key Specifications
| Parameter | Test Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Data Rate | High-Speed mode | 105,469 | 105,469 | 105,469 | SPS |
| Data Rate | High-Resolution mode | 52,734 | 52,734 | 52,734 | SPS |
| Data Rate | Low-Power mode | 52,734 | 52,734 | 52,734 | SPS |
| Resolution | No missing codes | 24 | 24 | 24 | Bits |
| Signal-to-Noise Ratio (SNR) | High-Speed mode | 99 | 106 | 101 | dB |
| Signal-to-Noise Ratio (SNR) | High-Resolution mode | 109 | 103 | 109 | dB |
| Total Harmonic Distortion (THD) | VIN = 1kHz, −0.5dBFS | −105 | −95 | −108 | dB |
| Analog Supply | 5 | V | |||
| Digital Supply | 1.8 to 3.3 | V | |||
| Operating Temperature Range | −40 to +105 | °C |
Key Features
- Up to 105kSPS data rate in High-Speed mode
- High-Resolution mode with 109dB SNR and −108dB THD
- Low-Power mode with 35mW dissipation
- Internal offset calibration on command
- Selectable SPI or Frame Sync serial interface
- Daisy-chainable serial interface for multichannel systems
- Simple pin-driven control
- Modulator output option
- Linear phase response digital filter with ±0.005dB passband ripple and 100dB stop band attenuation
- Specified from −40°C to +105°C
Applications
- Vibration/Modal Analysis
- Acoustics
- Dynamic Strain Gauges
- Pressure Sensors
- Test and Measurement
Q & A
- What is the maximum data rate of the ADS1271?
The ADS1271 can operate at a maximum data rate of 105,469 SPS in High-Speed mode.
- What are the different operating modes of the ADS1271?
The ADS1271 has three operating modes: High-Speed, High-Resolution, and Low-Power.
- What is the signal-to-noise ratio (SNR) in High-Resolution mode?
The SNR in High-Resolution mode is up to 109dB.
- What is the total harmonic distortion (THD) of the ADS1271?
The THD is −108dB at VIN = 1kHz, −0.5dBFS.
- What are the analog and digital supply voltage ranges for the ADS1271?
The analog supply voltage is 5V, and the digital supply voltage ranges from 1.8V to 3.3V.
- What is the operating temperature range of the ADS1271?
The operating temperature range is from −40°C to +105°C.
- Does the ADS1271 support daisy-chaining for multichannel systems?
Yes, the ADS1271 supports daisy-chaining for multichannel systems with easy synchronization.
- What types of serial interfaces are supported by the ADS1271?
The ADS1271 supports both SPI and Frame Sync serial interfaces.
- Can the ADS1271 perform internal offset calibration?
Yes, the ADS1271 can perform internal offset calibration on command.
- What are some typical applications of the ADS1271?
Typical applications include vibration/modal analysis, acoustics, dynamic strain gauges, pressure sensors, and test and measurement.
