Support software
Data sheet
ADS131M04
- 4 simultaneously sampling differential inputs
- Programmable data rate up to 64 kSPS
- Programmable gain up to 128
- Noise performance:
- 102-dB dynamic range at gain = 1, 4 kSPS
- 80-dB dynamic range at gain = 64, 4 kSPS
- Total harmonic distortion: –100 dB
- High-impedance inputs for direct sensor connection:
- Input impedance 330-kΩ for gains of 1, 2, and 4
- Input impedance ≥ 1-MΩ for gains of 8, 16, 32, 64, and 128
- Programmable channel-to-channel phase delay calibration:
- 244-ns resolution, 8.192-MHz fCLKIN
- Current-detect mode allows 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
- Cyclic redundancy check (CRC) on communications and register map
- 2.7-V to 3.6-V analog and digital supplies
- Low power consumption: 3.3 mW at 3-V AVDD and DVDD
- Packages: 20-pin TSSOP or 20-pin WQFN
- Operating temperature range: –40°C to +125°C
The ADS131M04 is a four-channel, simultaneously-sampling, 24-bit, delta-sigma (ΔΣ), analog-to-digital converter (ADC) that offers wide dynamic range, low power, and energy-measurement-specific features, making the device an excellent fit for energy metering, power metrology, and circuit breaker applications. The ADC inputs can be directly interfaced to a resistor-divider network or a power transformer to measure voltage or to a current transformer, shunt, or a Rogowski coil to measure current.
The individual ADC channels can be independently configured depending on the sensor input. A low-noise, programmable gain amplifier (PGA) provides gains ranging from 1 to 128 to amplify low-level signals. Additionally, this device integrates channel-to-channel phase calibration and offset and gain calibration registers to help remove signal-chain errors.
A low-drift, 1.2-V reference is integrated into the device reducing printed circuit board (PCB) area. Optional cyclic redundancy checks (CRCs) on the data input, data output, and register map maintain communication integrity.
The complete analog front-end (AFE) is offered in a 20-pin TSSOP package or a leadless 20-pin WQFN package and is specified over the industrial temperature range of –40°C to +125°C.
Technical documentation
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View all 10 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | ADS131M04 4-Channel, Simultaneously-Sampling, 24-Bit, Delta-Sigma ADC datasheet (Rev. D) | 24 May 2021 | |
| White paper | 정확한 감지를 통해 시스템 성능을 개선하고 효율성을 높이는 방법 (Rev. B) | PDF | HTML | 09 Jun 2023 | |
| White paper | How Accurate Sensing Enables Better System Performance and Increased Efficiency (Rev. B) | PDF | HTML | 10 May 2023 | |
| Application note | A Basic Guide to Bridge Measurements | PDF | HTML | 18 Feb 2022 | |
| Application note | Two-Phase Rogowski Coil Based Electricity Meter Analog Front-End Circuit (Rev. A) | 10 Sep 2021 | ||
| Application note | Communication Methods for Data Integrity Using Delta-Sigma Data Converters (Rev. A) | PDF | HTML | 23 Aug 2021 | |
| Circuit design | Circuit for protecting ADS131M0x ADC from electrical overstress | PDF | HTML | 31 Mar 2021 | |
| E-book | Fundamentals of Precision ADC Noise Analysis | 19 Jun 2020 | ||
| White paper | How to detect and harden a meter against tampering by neutral disconnection | 12 Feb 2020 | ||
| EVM User's guide | ADS131M04 Evaluation Module User's Guide (Rev. A) | 26 Jun 2019 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Evaluation board
ADS131M04EVM — Automotive, four-channel, 24-bit, 64-kSPS, simultaneous-sampling, delta-sigma ADC
The ADS131M04 evaluation module (EVM) is a platform for evaluating the ADS131M04, which is a low-power, simultaneous-sampling, delta-sigma analog-to-digital converter (ADC).
The ADS131M04EVM kit includes the ADS131M04EVM board and a precision host interface (PHI) controller board that (...)
User guide: PDF
Application software & framework
ADC-ENERGY-METROLOGY-LIB-SW — ADC energy metrology library software
The ADC energy metrology library software package implements various metrology parameters for energy measurement typical of electricity meters, power-distribution units (PDUs), and circuit breakers using high-performance, multichannel analog-to-digital converters (ADCs).
The ADC samples the output (...)
Support software
SBAC257 — ADS131M04 EVM GUI Installer
Supported products & hardware
Products
Precision ADCs
Hardware development
Evaluation board
Calculation tool
ANALOG-ENGINEER-CALC — Analog engineer's calculator
The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)
Simulation tool
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Simulation tool
TINA-TI — SPICE-based analog simulation program
TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
User guide: PDF
Reference designs
TIDA-010036 — One-phase shunt electricity meter reference design using standalone ADCs
This reference design implements Class 0.5 single-phase energy measurement using standalone multi-channel analog-to-digital converters (ADC) to sample a shunt current sensor. With the combination of the shunt sensor and a compact magnetically immune power supply, the design provides protection (...)
Reference designs
TIDA-010037 — High accuracy split-phase CT electricity meter reference design using standalone ADCs
This reference design implements Class 0.1 split-phase energy measurement using high-performance, multi-channel analog-to-digital converters (ADC). The independent ADC samples the output of current transformers (CT) at 8 kHz to measure the current and voltage of each leg of the AC mains. The (...)
| Package | Pins | Download |
|---|---|---|
| TSSOP (PW) | 20 | View options |
| WQFN (RUK) | 20 | View options |
Ordering & quality
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