Overview
The ADS131M08IPBS from Texas Instruments is an 8-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 specific features tailored for energy measurement applications. It is particularly suited for energy metering, power metrology, and circuit breaker applications. The ADC allows direct interface with various sensors and offers programmable gain and phase calibration, making it highly versatile and accurate in its measurements.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Channels | 8 |
| Resolution | 24-bit |
| Sampling Rate | Up to 32 kSPS |
| Programmable Gain | Up 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 1, 2, 4; ≥ 1 MΩ for gains 8, 16, 32, 64, 128 |
| Phase Delay Calibration | 244-ns resolution, 8.192-MHz fCLKIN |
| Analog and Digital Supplies | 2.7 V to 3.6 V |
| Power Consumption | 6.0 mW at 3 V AVDD and DVDD |
| Packages | 32-pin TQFP or 32-pin WQFN |
| Operating Temperature Range | –40°C to +125°C |
Key Features
- 8 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 with 244-ns resolution
- Current-detect mode for low power tamper detection
- Fast startup: first data within 0.5 ms of supply ramp
- Integrated negative charge pump allows input signals below ground
- Crosstalk between channels: –120 dB
- Low-drift internal voltage reference
- Cyclic redundancy check (CRC) on communications and register map
Applications
The ADS131M08IPBS is particularly suited for various applications including:
- Energy metering
- Power metrology
- Circuit breaker applications
The device can be directly interfaced with resistor-divider networks, power transformers, current transformers, or Rogowski coils to measure voltage or current.
Q & A
- What is the resolution of the ADS131M08IPBS ADC?
The ADS131M08IPBS has a resolution of 24 bits. - What is the maximum sampling rate of the ADS131M08IPBS?
The maximum sampling rate is up to 32 kSPS. - What is the range of programmable gain for the ADS131M08IPBS?
The programmable gain ranges from 1 to 128. - What is the dynamic range of the ADS131M08IPBS 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 ADS131M08IPBS?
The total harmonic distortion is –100 dB. - What are the input impedance values for different gains?
The input impedance is 330 kΩ for gains 1, 2, and 4, and ≥ 1 MΩ for gains 8, 16, 32, 64, and 128. - What is the phase delay calibration resolution of the ADS131M08IPBS?
The phase delay calibration resolution is 244 ns with an 8.192-MHz fCLKIN. - What are the analog and digital supply voltage ranges for the ADS131M08IPBS?
The analog and digital supply voltage ranges are 2.7 V to 3.6 V. - What is the power consumption of the ADS131M08IPBS at 3 V AVDD and DVDD?
The power consumption is 6.0 mW at 3 V AVDD and DVDD. - In what packages is the ADS131M08IPBS available?
The device is available in 32-pin TQFP or 32-pin WQFN packages.
