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ADS131A02

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24-bit 128-kSPS 2-channel simultaneous-sampling delta-sigma ADC

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Data sheet

ADS131A02

ACTIVE
Data sheet Order now

Product details

Resolution (Bits) 24 Sample rate (max) (ksps) 128 Number of input channels 2 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-ended Multichannel configuration Simultaneous Sampling Rating Catalog Reference mode External, Internal Input voltage range (max) (V) 4.5 Input voltage range (min) (V) -1.5 Features Daisy-Chainable Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 6.2 Analog supply voltage (min) (V) 3 Analog supply voltage (max) (V) 5.5 SNR (dB) 115.2 Digital supply (min) (V) 1.65 Digital supply (max) (V) 3.6
Resolution (Bits) 24 Sample rate (max) (ksps) 128 Number of input channels 2 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-ended Multichannel configuration Simultaneous Sampling Rating Catalog Reference mode External, Internal Input voltage range (max) (V) 4.5 Input voltage range (min) (V) -1.5 Features Daisy-Chainable Operating temperature range (°C) -40 to 125 Power consumption (typ) (mW) 6.2 Analog supply voltage (min) (V) 3 Analog supply voltage (max) (V) 5.5 SNR (dB) 115.2 Digital supply (min) (V) 1.65 Digital supply (max) (V) 3.6
TQFP (PBS) 32 49 mm² (7 mm × 7 mm)
  • 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
  • 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

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.

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

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Top documentation Type Title Format options Date
* Data sheet ADS131A0x 2- or 4-Channel, 24-Bit, 128-kSPS, Simultaneous-Sampling, Delta-Sigma ADC datasheet (Rev. E) PDF | HTML Jun 17, 2020
Application note A Simple, Java-Based CRC Calculator PDF | HTML Mar 4, 2026
Application note A Basic Guide to Bridge Measurements (Rev. A) PDF | HTML Mar 13, 2024
Application note Digital Filter Types in Delta-Sigma ADCs (Rev. A) PDF | HTML Mar 29, 2023
Application note Communication Methods for Data Integrity Using Delta-Sigma Data Converters (Rev. A) PDF | HTML Aug 23, 2021
E-book Fundamentals of Precision ADC Noise Analysis (Rev. A) Jun 19, 2020

Design & development

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

Evaluation board

ADS131A04EVM — ADS131A04 evaluation module

The ADS131A04 evaluation module (EVM) is a platform for evaluating the ADS131A04, which is a low-power, simultaneous-sampling, delta-sigma analog-to-digital converter (ADC). The ADS131A04EVM includes the ADS131A04EVM board and the precision host interface (PHI) controller board that enables the (...)
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Support software

ADS131A04-C-EXAMPLE-CODE — ADS131A04 example C code

Expedite your embedded design using this example C code for the ADS131A04
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Simulation model

ADS131A02 IBIS Model

SBAM292.ZIP (76 KB) - IBIS model
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Calculation tool

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 (...)

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Design tool

ADC-DAC-TO-VREF-SELECT-DESIGN-TOOL — The ADC-TO-VREF-SELECT tool enables the pairing of TI ADCs, DACs, and series voltage references.

The ADC-TO-VREF-SELECT tool enables the pairing of TI analog-to-digital converters (ADCs) and series voltage references. Users can select an ADC device and the desired reference voltage, and the tool will list up to two voltage reference recommendations.
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Reference design

TIDA-00835 — High Accuracy ±0.5% Current and Isolated Voltage Measurement Ref Design Using 24-Bit Delta-Sigma ADC

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 (...)

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TQFP (PBS) 32 Ultra Librarian
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