Overview
The Texas Instruments ADS131M08IPBSR is an eight-channel, simultaneously-sampling, 24-bit, delta-sigma (ΔΣ) analog-to-digital converter (ADC). This device is designed to offer a wide dynamic range, low power consumption, and energy-measurement-specific features, making it an excellent fit for applications such as energy metering, power metrology, and circuit breaker systems. The ADC allows for direct interface with various sensors through high-impedance inputs and includes a low-noise, programmable gain amplifier (PGA) to amplify low-level signals.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Channels | 8 |
| Resolution | 24-bit |
| Sampling Rate | Up to 32 kSPS |
| Programmable Gain | 1 to 128 |
| Dynamic Range | 102 dB at gain = 1, 4 kSPS; 80 dB at gain = 64, 4 kSPS |
| Total Harmonic Distortion | –100 dB |
| Input Impedance | 330 kΩ for gains of 1, 2, and 4; ≥ 1 MΩ for gains of 8, 16, 32, 64, and 128 |
| Channel-to-Channel Phase Delay Calibration | 244 ns resolution, 8.192 MHz fCLKIN |
| Analog and Digital Supplies | 2.7V to 3.6V |
| Power Consumption | 6.0 mW at 3V AVDD and DVDD |
| Operating Temperature Range | –40°C to +125°C |
| Package | 32-pin TQFP, 32-pin WQFN |
Key Features
- Eight simultaneously sampling differential inputs
- Programmable data rate up to 32 kSPS
- Programmable gain up to 128
- High-impedance inputs for direct sensor connection
- Programmable channel-to-channel phase delay calibration
- Current-detect mode for low-power tamper detection
- Fast startup: first data within 0.5 ms of the supply ramp
- Integrated negative charge pump allows input signals below ground
- Low-drift internal voltage reference
- Cyclic redundancy check (CRC) on communications and register map
Applications
- Commercial and industrial electricity meters
- Circuit breakers
- Battery test equipment
- Battery management systems
Q & A
- What is the resolution of the ADS131M08IPBSR ADC?
The ADS131M08IPBSR has a 24-bit resolution. - How many channels does the ADS131M08IPBSR support?
The device supports eight simultaneously sampling channels. - What is the maximum sampling rate of the ADS131M08IPBSR?
The maximum sampling rate is up to 32 kSPS. - What is the range of the programmable gain in the ADS131M08IPBSR?
The programmable gain ranges from 1 to 128. - What is the dynamic range of the ADS131M08IPBSR at different gains?
The dynamic range is 102 dB at gain = 1, 4 kSPS, and 80 dB at gain = 64, 4 kSPS. - What is the total harmonic distortion of the ADS131M08IPBSR?
The total harmonic distortion is –100 dB. - What are the input impedance values for different gains?
The input impedance is 330 kΩ for gains of 1, 2, and 4, and ≥ 1 MΩ for gains of 8, 16, 32, 64, and 128. - Does the ADS131M08IPBSR support channel-to-channel phase delay calibration?
Yes, it supports programmable channel-to-channel phase delay calibration with a 244 ns resolution. - What is the power consumption of the ADS131M08IPBSR?
The power consumption is 6.0 mW at 3V AVDD and DVDD. - What are the typical applications of the ADS131M08IPBSR?
Typical applications include commercial and industrial electricity meters, circuit breakers, battery test equipment, and battery management systems.
