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ADS131M08

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24-bit 32-kSPS 8-channel simultaneous-sampling delta-sigma ADC

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Product details

Parameters

Resolution (Bits) 24 Number of input channels 8 Sample rate (Max) (kSPS) 32 Interface type SPI Architecture Delta-Sigma Input type Differential Multi-channel configuration Simultaneous Sampling Rating Catalog Reference mode Int Input range (Max) (V) 3.6 Input range (Min) (V) -1.3 Features PGA, Small Size Operating temperature range (C) -40 to 125 Power consumption (Typ) (mW) 6 Analog voltage AVDD (Min) (V) 2.7 SNR (dB) 101 Analog voltage AVDD (Max) (V) 3.6 Digital supply (Min) (V) 2.7 Digital supply (Max) (V) 3.6 open-in-new Find other Precision ADCs (<=10MSPS)

Package | Pins | Size

TQFP (PBS) 32 49 mm² 7 x 7 open-in-new Find other Precision ADCs (<=10MSPS)

Features

  • 8 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
  • 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: 6.0 mW at 3-V AVDD and DVDD
  • Package: 32-pin TQFP or 32-pin WQFN (preview)
  • Operating temperature range: –40°C to +125°C

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Description

The ADS131M08 is a eight-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 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 32-pin TQFP or leadless 32-pin WQFN package and is specified over the industrial temperature range of –40°C to +125°C.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 6
Type Title Date
* Datasheet ADS131M08 8-Channel, Simultaneously-Sampling, 24-Bit, Delta-Sigma ADC datasheet (Rev. A) Dec. 13, 2019
White papers Designing an Accurate, Multifunction Lithium-Ion Battery-Testing Solution Sep. 24, 2020
Application notes Two-phase Rogowski coil based electricity meter analog front-end circuit Jul. 02, 2020
White papers Fundamentals of Precision ADC Noise Analysis Jun. 19, 2020
Application notes Communication Methods for Data Integrity Using Delta-Sigma Data Converters Jun. 01, 2020
User guides ADS131M08 Evaluation Module User's Guide (Rev. A) Dec. 03, 2019

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
document-generic User guide
149
Description

The ADS131M08 evaluation module (EVM) is a platform for evaluating the ADS131M08, which is a low-power, 8-channel, simultaneous-sampling, delta-sigma analog-to-digital converter (ADC).

The ADS131M08EVM kit includes the ADS131M08EVM board and a precision host interface (PHI) controller board (...)

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

SUPPORT SOFTWARE Download
SBAC254B.ZIP (64 KB)

Design tools & simulation

SIMULATION MODELS Download
SBAM435.ZIP (50 KB) - IBIS Model
SIMULATION TOOLS Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
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
  • (...)
SIMULATION TOOLS Download
SPICE-based analog simulation program
TINA-TI 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 (...)
document-generic User guide
CALCULATION TOOLS Download
Analog-to-digital converter (ADC) input driver design tool supporting multiple input types
ADC-INPUT-CALC ADC-INPUT-CALC is an online tool that provides support for designing the input buffer to an analog-to-digital converter (ADC). It offers 24 different op-amp based buffer circuits that can be used to drive an ADC input. The available topologies cover differential, single-ended and transformer-coupled (...)
CALCULATION TOOLS Download
Analog engineer's calculator
ANALOG-ENGINEER-CALC — 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 op-amp gain with feedback (...)
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
  • (...)

CAD/CAE symbols

Package Pins Download
TQFP (PBS) 32 View options

Ordering & quality

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