Overview
The ADS131M04IPWR, produced by Texas Instruments, is a four-channel, simultaneously-sampling, 24-bit, delta-sigma (ΔΣ) analog-to-digital converter (ADC). 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 features four simultaneously sampling differential inputs and can be directly interfaced with various sensors and measurement devices.
The device supports programmable data rates up to 64 kSPS and programmable gain up to 128, allowing for the amplification of low-level signals. It also includes features like high-impedance inputs, fast startup times, and integrated negative charge pumps to handle input signals below ground. The ADS131M04IPWR is available in 20-pin TSSOP and 20-pin WQFN packages and operates over an industrial temperature range of –40°C to +125°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Channels | 4 | - |
| Resolution | 24 bits | - |
| Data Rate | Up to 64 kSPS | samples per second |
| Programmable Gain | 1 to 128 | - |
| Dynamic Range | 102 dB at gain = 1, 4 kSPS; 80 dB at gain = 64, 4 kSPS | dB |
| Total Harmonic Distortion | –100 dB | dB |
| Input Impedance | 330 kΩ for gains of 1, 2, and 4; ≥ 1 MΩ for gains of 8, 16, 32, 64, and 128 | Ω |
| Channel-to-Channel Phase Delay Calibration | 244-ns resolution, 8.192-MHz fCLKIN | ns |
| Supply Voltage | 2.7 V to 3.6 V | V |
| Power Consumption | 3.3 mW at 3-V AVDD and DVDD | mW |
| Operating Temperature Range | –40°C to +125°C | °C |
| Package Options | 20-pin TSSOP, 20-pin WQFN | - |
Key Features
- Four simultaneously sampling differential inputs for precise measurement.
- Programmable data rate up to 64 kSPS and programmable gain up to 128.
- High-impedance inputs for direct sensor connection, with input impedance of 330 kΩ for gains of 1, 2, and 4, and ≥ 1 MΩ for gains of 8, 16, 32, 64, and 128.
- Programmable channel-to-channel phase delay calibration with 244-ns resolution.
- Current-detect mode for extremely 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 (1.2 V).
- Cyclic redundancy check (CRC) on communications and register map for communication integrity.
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 ADS131M04IPWR ADC?
The resolution of the ADS131M04IPWR is 24 bits.
- What are the programmable data rates of the ADS131M04IPWR?
The programmable data rates of the ADS131M04IPWR are up to 64 kSPS.
- What is the range of programmable gain for the ADS131M04IPWR?
The programmable gain of the ADS131M04IPWR ranges from 1 to 128.
- What is the dynamic range of the ADS131M04IPWR 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 ADS131M04IPWR?
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 channel-to-channel phase delay calibration resolution?
The channel-to-channel phase delay calibration resolution is 244 ns with an 8.192-MHz fCLKIN.
- What is the power consumption of the ADS131M04IPWR at 3-V AVDD and DVDD?
The power consumption is 3.3 mW at 3-V AVDD and DVDD.
- What are the package options for the ADS131M04IPWR?
The package options are 20-pin TSSOP and 20-pin WQFN.
- What is the operating temperature range of the ADS131M04IPWR?
The operating temperature range is –40°C to +125°C.
