Overview
The ADS1271IPW, produced by Texas Instruments, is a 24-bit, delta-sigma analog-to-digital converter (ADC) designed for high-precision industrial measurements. 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 | 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 |
| Integral Nonlinearity (INL) | Differential input, VCM = 2.5V | ±0.0006 | ±0.0015 | ±0.0015 | %FSR |
| Offset Error | High-Speed mode, without calibration | 0.150 | 1 | 1 | mV |
| Offset Drift | 1.8 | 1.8 | 1.8 | µV/°C | |
| Gain Error | 0.1 | 0.5 | 0.5 | %FSR | |
| Gain Error Drift | 2 | 2 | 2 | ppm/°C | |
| Signal-to-Noise Ratio (SNR) | High-Speed mode | 99 | 106 | 106 | dB |
| Signal-to-Noise Ratio (SNR) | High-Resolution mode | 109 | 109 | 109 | dB |
| Total Harmonic Distortion (THD) | High-Speed mode | -108 | -108 | -108 | dB |
| Analog Supply | 5V | 5V | 5V | V | |
| Digital Supply | 1.8V to 3.3V | 1.8V to 3.3V | 1.8V to 3.3V | V | |
| Operating Temperature Range | -40°C to +105°C | -40°C to +105°C | -40°C to +105°C | °C |
Key Features
- High Data Rate: Up to 105kSPS in High-Speed mode.
- AC Performance: 51kHz bandwidth, 109dB SNR in High-Resolution mode, and -108dB THD.
- DC Accuracy: 1.8µV/°C offset drift and 2ppm/°C gain drift.
- Selectable Operating Modes: High-Speed, High-Resolution, and Low-Power modes.
- Power-Down Control: Allows for power management.
- Digital Filter: Linear phase response, ±0.005dB passband ripple, and 100dB stop band attenuation.
- Internal Offset Calibration: On-command calibration.
- Selectable SPI or Frame Sync Serial Interface: Flexible communication options.
- Daisy-Chainable Serial Interface: Easy synchronization for multichannel systems.
- Simple Pin-Driven Control: Easy control via pin settings.
- Modulator Output Option: Available in certain versions.
Applications
- Vibration/Modal Analysis: Suitable for measuring vibrations and modal analysis.
- Acoustics: Used in acoustic measurements.
- Dynamic Strain Gauges: Ideal for strain gauge applications.
- Pressure Sensors: Applicable in pressure sensing applications.
- Test and Measurement: Widely used in various test and measurement scenarios.
Q & A
- What is the maximum data rate of the ADS1271IPW?
The ADS1271IPW has a maximum data rate of up to 105kSPS in High-Speed mode.
- What are the key AC performance specifications of the ADS1271IPW?
The key AC performance specifications include a 51kHz bandwidth, 109dB SNR in High-Resolution mode, and -108dB THD.
- How accurate is the DC performance of the ADS1271IPW?
The DC performance includes 1.8µV/°C offset drift and 2ppm/°C gain drift, ensuring high accuracy.
- What are the different operating modes available for the ADS1271IPW?
The ADS1271IPW offers High-Speed, High-Resolution, and Low-Power operating modes.
- Does the ADS1271IPW support power-down control?
Yes, the ADS1271IPW supports power-down control for power management.
- What type of digital filter does the ADS1271IPW use?
The ADS1271IPW uses a digital filter with a linear phase response, ±0.005dB passband ripple, and 100dB stop band attenuation.
- Can the ADS1271IPW perform internal offset calibration?
Yes, the ADS1271IPW can perform internal offset calibration on command.
- What serial interfaces are available for the ADS1271IPW?
The ADS1271IPW supports selectable SPI or Frame Sync serial interfaces.
- Is the ADS1271IPW suitable for multichannel systems?
Yes, the ADS1271IPW is designed for multichannel systems with daisy-chainable serial interfaces and easy synchronization.
- What is the operating temperature range of the ADS1271IPW?
The operating temperature range of the ADS1271IPW is from -40°C to +105°C.
