ADS131M02
- 2 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 of 330 kΩ for gains of 1, 2, and 4
- Input impedance of ≥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
- 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: 2.3 mW at 3-V AVDD and DVDD
- Packages: 20-pin TSSOP or 20-pin WQFN
- Operating temperature range: –40°C to +125°C
The ADS131M02 is a two-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.
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Technical documentation
Type | Title | Date | ||
---|---|---|---|---|
* | Data sheet | ADS131M02 2-Channel, Simultaneously-Sampling, 24-Bit, Delta-Sigma ADC datasheet (Rev. A) | PDF | HTML | 07 Apr 2021 |
Application note | A Basic Guide to Bridge Measurements (Rev. A) | PDF | HTML | 13 Mar 2024 | |
Application note | Digital Filter Types in Delta-Sigma ADCs (Rev. A) | PDF | HTML | 29 Mar 2023 | |
Technical article | How to design an accurate DC power supply | PDF | HTML | 08 Apr 2021 | |
Circuit design | Circuit for protecting ADS131M0x ADC from electrical overstress | PDF | HTML | 31 Mar 2021 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
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 (...)
ADC-DESIGN-CALC — Online design calculator tool for TI Precision ADCs
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ANALOG-ENGINEER-CALC — PC software 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 (...)
Supported products & hardware
Products
Precision op amps (Vos<1mV)
General-purpose op amps
Audio op amps
Transimpedance amplifiers
High-speed op amps (GBW ≥ 50 MHz)
Power op amps
Video amplifiers
Line drivers
Transconductance amplifiers & laser drivers
Fully differential amplifiers
Precision ADCs
Biosensing AFEs
High-speed ADCs (≥10 MSPS)
Receivers
Touchscreen controllers
Difference amplifiers
Instrumentation amplifiers
Audio line receivers
Analog current-sense amplifiers
Digital power monitors
Analog current-sense amplifiers with integrated shunt resistor
Digital power monitors with integrated shunt resistor
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TINA-TI — SPICE-based analog simulation program
TIDA-010944 — Single-phase and split-phase shunt energy metrology reference design
Package | Pins | CAD symbols, footprints & 3D models |
---|---|---|
TSSOP (PW) | 20 | Ultra Librarian |
WQFN (RUK) | 20 | Ultra Librarian |
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