Overview
The ADS131M02IPWR is a two-channel, simultaneously-sampling, 24-bit, delta-sigma (ΔΣ) analog-to-digital converter (ADC) produced by Texas Instruments. This device is designed to offer 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 direct interface to various sensors and measurement devices, including resistor-divider networks, power transformers, current transformers, shunts, and Rogowski coils.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Number of Channels | Simultaneously sampling differential inputs | 2 |
| Resolution | Bits | 24 |
| Data Rate | Programmable data rate | Up to 64 kSPS |
| Programmable Gain | Gain settings | 1, 2, 4, 8, 16, 32, 64, 128 |
| Dynamic Range | At gain = 1, 4 kSPS | 102 dB |
| Dynamic Range | At gain = 64, 4 kSPS | 80 dB |
| Total Harmonic Distortion | –100 dB | |
| Input Impedance | For gains of 1, 2, and 4 | 330 kΩ |
| Input Impedance | For gains of 8, 16, 32, 64, and 128 | ≥1 MΩ |
| Channel-to-Channel Phase Delay Calibration | Resolution, 8.192-MHz fCLKIN | 244 ns |
| Power Supply | Analog and digital supplies | 2.7-V to 3.6-V |
| Power Consumption | At 3-V AVDD and DVDD | 2.3 mW |
| Packages | 20-pin TSSOP or 20-pin WQFN | |
| Operating Temperature Range | –40°C to +125°C |
Key Features
- Two simultaneously sampling differential inputs
- Programmable data rate up to 64 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 extremely low power tamper detection
- 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
- Fast startup: first data within 0.5 ms of supply ramp
Applications
- Electricity meters: commercial and residential
- Circuit breakers
- Protection relays
- Power quality meters
- Battery test equipment
- Battery management systems
Q & A
- What is the resolution of the ADS131M02IPWR ADC?
The resolution of the ADS131M02IPWR is 24 bits.
- What is the maximum data rate of the ADS131M02IPWR?
The maximum data rate is up to 64 kSPS.
- What are the programmable gain settings of the ADS131M02IPWR?
The gain settings are 1, 2, 4, 8, 16, 32, 64, and 128.
- What is the dynamic range of the ADS131M02IPWR at gain = 1 and 4 kSPS?
The dynamic range is 102 dB at gain = 1 and 4 kSPS.
- What is the total harmonic distortion of the ADS131M02IPWR?
The total harmonic distortion is –100 dB.
- What are the input impedance values for different gain settings?
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.
- What is the power consumption of the ADS131M02IPWR at 3-V AVDD and DVDD?
The power consumption is 2.3 mW at 3-V AVDD and DVDD.
- What are the available packages for the ADS131M02IPWR?
The available packages are 20-pin TSSOP and 20-pin WQFN.
- What is the operating temperature range of the ADS131M02IPWR?
The operating temperature range is –40°C to +125°C.
- Does the ADS131M02IPWR support cyclic redundancy checks (CRCs)?
Yes, the device supports CRCs on communications and register map.
- How quickly can the ADS131M02IPWR start up and provide the first data?
The first data is available within 0.5 ms of the supply ramp.
