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Product details

Parameters

Resolution (Bits) 24 Number of input channels 2 Sample rate (Max) (kSPS) 128 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-Ended Multi-channel configuration Simultaneous Sampling Rating Catalog Reference mode Ext, Int Input range (Max) (V) 4.5 Input range (Min) (V) -1.5 Features Daisy-Chainable Operating temperature range (C) -40 to 125 Power consumption (Typ) (mW) 6.2 Analog voltage AVDD (Min) (V) 3 SNR (dB) 115.2 Analog voltage AVDD (Max) (V) 5.5 Digital supply (Min) (V) 1.65 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

  • 2 or 4 simultaneous-sampling differential inputs
  • Data rates up to 128 kSPS
  • High performance:
    • Single-channel accuracy: better than 0.1% at 10,000:1 dynamic range
    • Effective resolution: 20.6 bits at 8 kSPS
    • THD: –100 dB at 50 Hz and 60 Hz
  • Integrated negative charge pump allows absolute input voltages below ground
  • Flexible analog power-supply operation:
    • Using negative charge pump: 3.0 V to 3.45 V
    • Unipolar supply: 3.3 V to 5.5 V
    • Bipolar supply: ±2.5 V
  • Digital supply: 1.65 V to 3.6 V
  • Low-drift internal voltage reference: 6 ppm/°C
  • ADC self checks
  • Cyclic redundancy check (CRC) and hamming code error correction on communications
  • Multiple SPI data interface modes:
    • Asynchronous interrupt
    • Synchronous master and slave
  • Package: 32-pin TQFP
  • Operating temperature range:
    –40°C to +125°C

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Description

The ADS131A02 and ADS131A04 devices are two- and four-channel, simultaneous-sampling, 24-bit, delta-sigma (ΔΣ), analog-to-digital converters (ADCs). The wide dynamic range, with scalable data rates up to 128 kSPS, and internal fault monitors make the ADS131A02 or ADS131A04 a good choice when designing for energy monitoring, grid protection, and control applications. The ADC inputs can be independently and directly interfaced to a resistor-divider network, a current transformer, or a Rogowski coil to measure voltage or current. Flexible power-supply options, including an internal negative charge pump, are available to maximize the effective resolution for high dynamic range applications.

Asynchronous and synchronous master and slave interface options are available, providing ADC configuration flexibility when chaining multiple devices in a single system. Several interface checks, ADC startup checks, and data integrity checks can be enabled on the interface to report errors in the ADC and during data transfer.

The complete analog front-end (AFE) solutions are packaged in a 32-pin TQFP package and are 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 4
Type Title Date
* Datasheet ADS131A0x 2- or 4-Channel, 24-Bit, 128-kSPS, Simultaneous-Sampling, Delta-Sigma ADC datasheet (Rev. E) Jun. 17, 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
Application notes Digital Filter Types in Delta-Sigma ADCs Jun. 27, 2017

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
Description

The ADS131A04EVM is an evaluation platform for the ADS131A04 and the ADS131A02. The ADS131A02 and ADS131A04 are two- and four-channel, simultaneously-sampling, 24-bit, delta-sigma (ΔΣ), analog-to-digital converters (ADCs). These devices offer flexible supply connections, low-drift (...)

Features
  • Includes all required support circuitry for the ADS131A04
  • Delta-Sigma ADC EvaluaTIon Software and ADS131A04 Device Package software
  • Configurable inputs, references, supplies, and clock sources
  • Easily accessible headers and test points for fast debug

Software development

SUPPORT SOFTWARE Download
SBAC267.ZIP (739 KB)

Design tools & simulation

SIMULATION MODELS Download
SBAM292.ZIP (76 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
  • (...)

Reference designs

REFERENCE DESIGNS Download
High Accuracy ±0.5% Current and Isolated Voltage Measurement Ref Design Using 24-Bit Delta-Sigma ADC
TIDA-00835 The TIDA-00835 reference design allows for accurate voltage and current measurement using a bipolar input configuration by incorporating a four- channel, 24-bit simultaneously-sampling differential input Delta-Sigma ADC over wide dynamic range. The ADC is configured to measure ±2.5 V bipolar (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
TQFP (PBS) 32 View options

Ordering & quality

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