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ADS131E08S

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24-bit 64-kSPS 8-ch simultaneous delta-sigma ADC with fast start-up for monitoring and protection

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Data sheet

ADS131E08S

ACTIVE
Data sheet Order now

Product details

Resolution (Bits) 24 Sample rate (max) (ksps) 64 Number of input channels 8 Interface type SPI Architecture Delta-Sigma Input type Differential, Pseudo-Differential Multichannel configuration Simultaneous Sampling Rating Catalog Reference mode Internal Input voltage range (max) (V) 4 Input voltage range (min) (V) 0 Features Daisy-Chainable, GPIO, Oscillator, PGA Operating temperature range (°C) -40 to 105 Power consumption (typ) (mW) 2 Analog supply (min) (V) 2.7 Analog supply voltage (max) (V) 5.25 SNR (dB) 108 Digital supply (min) (V) 1.7 Digital supply (max) (V) 3.6
Resolution (Bits) 24 Sample rate (max) (ksps) 64 Number of input channels 8 Interface type SPI Architecture Delta-Sigma Input type Differential, Pseudo-Differential Multichannel configuration Simultaneous Sampling Rating Catalog Reference mode Internal Input voltage range (max) (V) 4 Input voltage range (min) (V) 0 Features Daisy-Chainable, GPIO, Oscillator, PGA Operating temperature range (°C) -40 to 105 Power consumption (typ) (mW) 2 Analog supply (min) (V) 2.7 Analog supply voltage (max) (V) 5.25 SNR (dB) 108 Digital supply (min) (V) 1.7 Digital supply (max) (V) 3.6
TQFP (PAG) 64 144 mm² 12 x 12
  • Power-up time: 3 ms
  • Eight differential simultaneous sampling inputs
  • High performance:
    • Dynamic range at 1 kSPS: 118 dB
    • Crosstalk: –125 dB
    • THD: –100 dB at 50 Hz and 60 Hz
  • Low power consumption: 2 mW/channel
  • Data rates: 1, 2, 4, 8, 16, 32, and 64 kSPS
  • Gain options: 1, 2, 4, 8, and 12
  • Internal voltage reference: 8 ppm/°C Drift
  • Supply range:
    • Analog:
      • 2.7 V to 5.25 V (unipolar)
      • ±2.5 V (bipolar)
    • Digital: 1.7 V to 3.6 V
  • Fault detection and device self-testing capability
  • SPI™-compatible data interface and four GPIOs
  • Package: 64-pin TQFP
  • Operating temperature range: –40°C to +105°C
  • Power-up time: 3 ms
  • Eight differential simultaneous sampling inputs
  • High performance:
    • Dynamic range at 1 kSPS: 118 dB
    • Crosstalk: –125 dB
    • THD: –100 dB at 50 Hz and 60 Hz
  • Low power consumption: 2 mW/channel
  • Data rates: 1, 2, 4, 8, 16, 32, and 64 kSPS
  • Gain options: 1, 2, 4, 8, and 12
  • Internal voltage reference: 8 ppm/°C Drift
  • Supply range:
    • Analog:
      • 2.7 V to 5.25 V (unipolar)
      • ±2.5 V (bipolar)
    • Digital: 1.7 V to 3.6 V
  • Fault detection and device self-testing capability
  • SPI™-compatible data interface and four GPIOs
  • Package: 64-pin TQFP
  • Operating temperature range: –40°C to +105°C

The ADS131E08S is a multichannel, simultaneous sampling, 24-bit, delta-sigma (ΔΣ), analog-to-digital converter (ADC) with built-in programmable gain amplifiers (PGAs), an internal reference, and an internal oscillator. The ADC wide dynamic range, scalable data rates, and internal fault detect monitors make the ADS131E08S very attractive in industrial power monitoring, control, and protection applications. Fast power-up time allows data to be available within 3 ms of power being applied to the device for line-powered power applications. True high-impedance inputs enable the ADS131E08S to directly interface with a resistor-divider network or a voltage transformer to measure line voltage, or a current transformer or Rogowski coil to measure line current. With high integration levels and exceptional performance, the ADS131E08S enables the creation of scalable industrial power systems at a significantly reduced size, power, and overall cost.

The ADS131E08S has an individual input multiplexer per channel that can be independently connected to the internally-generated signals for test, temperature, and fault detection. Fault detection can be implemented internal to the device, using the integrated comparators with digital-to-analog converter (DAC)-controlled trigger levels. The ADS131E08S can operate at data rates as high as 64 kSPS.

The complete analog front-end (AFE) solution is available in a 64-pin TQFP package and is specified over the industrial temperature range of –40°C to +105°C.

The ADS131E08S is a multichannel, simultaneous sampling, 24-bit, delta-sigma (ΔΣ), analog-to-digital converter (ADC) with built-in programmable gain amplifiers (PGAs), an internal reference, and an internal oscillator. The ADC wide dynamic range, scalable data rates, and internal fault detect monitors make the ADS131E08S very attractive in industrial power monitoring, control, and protection applications. Fast power-up time allows data to be available within 3 ms of power being applied to the device for line-powered power applications. True high-impedance inputs enable the ADS131E08S to directly interface with a resistor-divider network or a voltage transformer to measure line voltage, or a current transformer or Rogowski coil to measure line current. With high integration levels and exceptional performance, the ADS131E08S enables the creation of scalable industrial power systems at a significantly reduced size, power, and overall cost.

The ADS131E08S has an individual input multiplexer per channel that can be independently connected to the internally-generated signals for test, temperature, and fault detection. Fault detection can be implemented internal to the device, using the integrated comparators with digital-to-analog converter (DAC)-controlled trigger levels. The ADS131E08S can operate at data rates as high as 64 kSPS.

The complete analog front-end (AFE) solution is available in a 64-pin TQFP package and is specified over the industrial temperature range of –40°C to +105°C.
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Technical documentation

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Type Title Date
* Data sheet ADS131E08S Eight-Channel, 24-Bit, Analog Front-End With Fast Power-Up Time datasheet (Rev. B) PDF | HTML 06 Apr 2020
Application note Digital Filter Types in Delta-Sigma ADCs (Rev. A) PDF | HTML 29 Mar 2023
Application note A Basic Guide to Bridge Measurements PDF | HTML 18 Feb 2022
E-book Fundamentals of Precision ADC Noise Analysis 19 Jun 2020
Technical article What’s the big deal about circuit breakers? 01 Aug 2017
Technical article Tripping Point: Simplifying circuit breaker design using delta-sigma ADCs 10 Aug 2016
Technical article Leverage coherent sampling and FFT windows when evaluating SAR ADCs (Part 1) 13 Mar 2015

Design & development

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

Evaluation board

ADS131E08EVM-PDK — ADS131E08 performance demonstration kit

The ADS131E08EVM-PDK is a demonstration kit for the ADS131E08, a simultaneous sampling, 24-bit, delta-sigma (Δ Σ) analog-to-digital converter (ADC) with a built-in programmable gain amplifier (PGA), internal reference, and an onboard oscillator. The ADS131E08 contains the features (...)

User guide: PDF
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Simulation model

ADS131E08 IBIS Model

SBAM160.ZIP (141 KB) - IBIS Model
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Calculation tool

ADC-INPUT-CALC — Analog-to-digital converter (ADC) input driver design tool supporting multiple input types

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 (...)
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Calculation tool

ANALOG-ENGINEER-CALC — 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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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
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Simulation tool

TINA-TI — SPICE-based analog simulation program

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 (...)
User guide: PDF
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Reference designs

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 (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00661 — High Resolution, Fast Startup Analog Front End for Air Circuit Breaker Reference Design

The TIDA-00661 reference design features signal processing front-end subsystem for electronic trip units (ETU) used in air circuit breakers (ACB) or molded case circuit breakers (MCCB). This subsystem consists of Delta-Sigma ADC with 24-Bit resolution and fast startup (< 3ms), ±2.5V (...)
Design guide: PDF
Schematic: PDF
Package Pins Download
TQFP (PAG) 64 View options
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