24-bit 32-kSPS 4-channel simultaneous-sampling delta-sigma ADC
Product details
Parameters
Package | Pins | Size
Features
- 4 simultaneously sampling differential inputs
- Programmable data rate up to 32 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:
- 330-kΩ input impedance for gains of
1, 2, and 4 - 1-MΩ input impedance for gains of
8, 16, 32, and 64
- 330-kΩ input impedance for gains of
- 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
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Description
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. Cyclic redundancy check (CRC) options can be individually enabled on the data input, data output, and register map to ensure communication integrity.
The complete analog front-end (AFE) is offered in a 20-pin TSSOP or leadless 20-pin WQFN package and is specified over the industrial temperature range of –40°C to +125°C.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | ADS131M04 4-Channel, Simultaneously-Sampling, 24-Bit, Delta-Sigma ADC datasheet (Rev. B) | Jun. 25, 2020 |
Application note | Two-phase Rogowski coil based electricity meter analog front-end circuit | Jul. 02, 2020 | |
E-book | Fundamentals of Precision ADC Noise Analysis | Jun. 19, 2020 | |
Application note | Communication Methods for Data Integrity Using Delta-Sigma Data Converters | Jun. 01, 2020 | |
White paper | How to detect and harden a meter against tampering by neutral disconnection | Feb. 12, 2020 | |
User guide | ADS131M04 Evaluation Module User's Guide (Rev. A) | Jun. 26, 2019 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
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 enables (...)
Features
- Onboard 3.3-V unipolar analog supply
- Onboard 3.3-V unipolar digital supply
- Digital header pins to connect to host microcontroller and logic analyzer
- Terminal blocks and header pins to connect external analog input signals
- Onboard 8.192-MHz crystal oscillator
- USB powered; no external power supply required
Software development
The ADC samples the output of (...)
Features
The software specifically supports the calculation of various metrology parameters for energy measurement including:
- Total and per-phase active (kWh), reactive (kvarh), and apparent energy (kVAh) with pulse-generation outputs
- Total and per-phase active (kW), reactive (kvar), and apparent power (kVA)
- (...)
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
Features
- Expedites circuit design with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
- Noise calculations
- Common unit translation
- Solves common amplifier circuit design problems
- Gain selections using standard resistors
- Filter configurations
- Total noise for common amplifier configurations
- (...)
Reference designs
Design files
-
download TIDA-010037 BOM.pdf (169KB) -
download TIDA-010037 Assembly Drawing.pdf (429KB) -
download TIDA-010037 PCB.pdf (2166KB) -
download TIDA-010037 CAD Files.zip (16902KB) -
download TIDA-010037 Gerber.zip (2336KB)
Design files
-
download TIDA-010036 BOM.pdf (168KB) -
download TIDA-010036 Assembly Drawing.pdf (394KB) -
download TIDA-010036 PCB.pdf (1817KB) -
download TIDA-010036 CAD Files.zip (14699KB) -
download TIDA-010036 Gerber.zip (1888KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
TSSOP (PW) | 20 | View options |
WQFN (RUK) | 20 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
Support & training
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