Overview
The ADS1271IPWRG4, 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 device 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.
The ADS1271IPWRG4 operates over an extended industrial temperature range from −40°C to +105°C and is available in a TSSOP-16 package.
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 |
| Integral Nonlinearity (INL) | Differential input, VCM = 2.5V | ±0.0006 | ±0.0015 | ±0.0006 | %FSR |
| Offset Error | High-Speed mode, without calibration | 0.150 | 1 | 0.150 | mV |
| Offset Drift | 1.8 | 1.8 | 1.8 | µV/°C | |
| Gain Error | 0.1 | 0.5 | 0.1 | %FSR | |
| Gain Error Drift | 2 | 2 | 2 | ppm/°C | |
| 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 |
| Passband Ripple | ±0.005 | ±0.005 | ±0.005 | dB | |
| Stop Band Attenuation | 100 | 100 | 100 | dB | |
| Analog Supply (AVDD) | 5 | 5 | 5 | V | |
| Digital Supply (DVDD) | 1.8 | 3.3 | 1.8 | V | |
| Operating Temperature Range | −40 | +105 | −40 | °C |
Key Features
- Data Rate: Up to 105kSPS in High-Speed mode, 52.734kSPS in High-Resolution and Low-Power modes.
- AC Performance: 109dB SNR in High-Resolution mode, −108dB THD, and ±0.005dB passband ripple.
- DC Accuracy: 1.8µV/°C offset drift, 2ppm/°C gain drift.
- Selectable Operating Modes: High-Speed, High-Resolution, and Low-Power modes for optimization of speed, resolution, and power.
- Power-Down Control: Allows for power-down to reduce power consumption.
- Digital Filter: Linear phase response with 100dB stop band attenuation.
- Internal Offset Calibration: On-command calibration for improved accuracy.
- Selectable SPI or Frame Sync Serial Interface: Convenient interfacing to microcontrollers or DSPs.
- Daisy-Chainable Serial Interface: Easy synchronization for multichannel systems.
- Simple Pin-Driven Control: No registers to program; all operations controlled directly by pins.
- Modulator Output Option: Accessible for external digital filter applications.
Applications
- Vibration/Modal Analysis: Suitable for precise measurement in vibration and modal analysis applications.
- Acoustics: Ideal for high-resolution audio and acoustic measurements.
- Dynamic Strain Gauges and Pressure Sensors: Used in applications requiring high accuracy and low noise.
- Test and Measurement: Applicable in various test and measurement equipment due to its high precision and reliability.
Q & A
- What is the maximum data rate of the ADS1271IPWRG4?
The maximum data rate of the ADS1271IPWRG4 is up to 105kSPS in High-Speed mode.
- What are the different operating modes available in the ADS1271IPWRG4?
The ADS1271IPWRG4 offers High-Speed, High-Resolution, and Low-Power operating modes.
- What is the signal-to-noise ratio (SNR) in High-Resolution mode?
The SNR in High-Resolution mode is up to 109dB.
- How does the device handle offset calibration?
The ADS1271IPWRG4 allows for internal offset calibration on command.
- What types of serial interfaces are supported by the ADS1271IPWRG4?
The device supports selectable SPI or Frame Sync serial interfaces.
- Is the ADS1271IPWRG4 suitable for multichannel systems?
Yes, it is designed for multichannel systems with daisy-chainable serial interface and easy synchronization.
- What is the operating temperature range of the ADS1271IPWRG4?
The operating temperature range is from −40°C to +105°C.
- What are the typical applications of the ADS1271IPWRG4?
It is used in vibration/modal analysis, acoustics, dynamic strain gauges, pressure sensors, and test and measurement applications.
- How is power management handled in the ADS1271IPWRG4?
The device includes power-down control to reduce power consumption.
- What is the analog supply voltage for the ADS1271IPWRG4?
The analog supply voltage (AVDD) is 5V.
