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Product details

Parameters

Resolution (Bits) 24 Number of input channels 4 Sample rate (Max) (kSPS) 128 Interface 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) 7.2 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 Approx. price (US$) 3.65 | 1ku 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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open-in-new Find other Precision ADCs (<=10MSPS)

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.

open-in-new Find other Precision ADCs (<=10MSPS)
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Technical documentation

Design & development

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

Hardware development

EVALUATION BOARDS Download
Description

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 (...)

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
SBAM269.ZIP (76 KB) - IBIS Model
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 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
Battery Tester Reference Design for High Current Applications
TIDA-01040 — Li-Ion battery formation and electrical testing require accurate voltage and current control, usually to better than ±0.05% over the specified temperature range.  This reference design proposes a solution for high-current (up to 50 A) battery tester applications supporting input (bus (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Battery tester reference design for multi-phase high-precision 0.5 to 100 A battery formation
TIDA-01041 — This reference design provides a multi-phase solution for a wide range of current battery test applications. Leveraging the dual phase buck/boost controller LM5170's daisy chain configuration gives the design the ability to achieve 100A charging/discharging rates. Utilizing high accuracy constant (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Modular battery tester reference design for 50-A, 100-A, and 200-A applications
TIDA-01042 — This reference design provides a modular battery test solution allowing users to have the flexibility to test batteries at different current levels with one design. This design leverages the TIDA-01041 reference design by providing two 100-A battery testers that can work independently or be (...)
document-generic Schematic document-generic User guide
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
REFERENCE DESIGNS Download
Reference Design to Measure AC Voltage & Current in Protection Relays w/Delta-Sigma Chip Diagnostics
TIDA-00810 The TIDA-00810 reference design accurately measures analog inputs performance and includes chip diagnostics to help identify power  systems failures early by using a highly accuracy AC voltage and current measurement analog front end (AFE) and a four-channel, 24-bit simultaneously-sampling (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
TQFP (PBS) 32 View options

Ordering & quality

Support & training

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