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HomeProductsIntegrated Circuits (ICs)Data Acquisition - Analog Front End (AFE)ADS131E08SPAGR
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ADS131E08SPAGR - Texas Instruments

Manufacturer Part Number
ADS131E08SPAGR
Manufacturer
Texas Instruments
Allelco Part Number
32D-ADS131E08SPAGR
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
3,936 pcs available, New & Original
Parts Description
IC AFE 8 CHAN 24BIT 64TQFP
Package
64-TQFP (10x10)
Data sheet
ADS131E08SPAGR.pdf

PCN Design/Specification

Cylindrical Battery Holders.pdf

PCN Assembly/Origin

2.73KHz.pdf
RoHs Status
ROHS3 Compliant
Compare
Our certification
In stock: 3936
  • Unit Price: $8.579
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $8.579 $8.58
10+ $8.212 $82.12
30+ $7.574 $227.22
100+ $7.018 $701.80
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

ADS131E08SPAGR Tech Specifications
Texas Instruments - ADS131E08SPAGR technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments - ADS131E08SPAGR

Product Attribute Attribute Value
Manufacturer Texas Instruments
Voltage - Supply, Digital 1.8V ~ 3.6V
Voltage - Supply, Analog 2.7V ~ 5.25V
Supplier Device Package 64-TQFP (10x10)
Series -
Power (Watts) 17.6 mW
Product Attribute Attribute Value
Package / Case 64-TQFP
Package Tape & Reel (TR)
Number of Channels 8
Number of Bits 24
Mounting Type Surface Mount
Base Product Number ADS131E08

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 3 (168 Hours)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8542.39.0001

Parts Introduction

ADS131E08SPAGR Image
ADS131E08SPAGR (1)

Manufacturer Part Number

ADS131E08SPAGR

Manufacturer

Texas Instruments

Introduction

The ADS131E08SPAGR is a multi-channel, 24-bit Analog Front End (AFE) designed for data acquisition systems.

Product Features and Performance

24-bit resolution

Eight-channel input

Low power consumption at 17.6 mW

Flexible supply voltage range - Analog: 2.7V to 5.25V, Digital: 1.8V to 3.6V

Integrated programmable gain amplifier (PGA)

Simultaneous-sampling Sigma-Delta A/D converters

Data output via SPI-compatible serial interface

Internal oscillator

Product Advantages

High-precision data acquisition

Reduced system power consumption

Scalable with multiple supply voltage options

In-built features for signal conditioning

Simple digital interface for easy integration

ADS131E08SPAGR Image
ADS131E08SPAGR (2)

Key Technical Parameters

24-bit resolution

Number of Channels: 8

Power consumption: 17.6 mW

Analog Supply Voltage range: 2.7V to 5.25V

Digital Supply Voltage range: 1.8V to 3.6V

Quality and Safety Features

Built-in CRC error checking for reliable communication

Lead-free and RoHS compliant

Compatibility

Compatible with various microcontrollers and processors with SPI interface

Mounting Type: Surface Mount

Package / Case: 64-TQFP

Supplier Device Package: 64-TQFP (10x10)

Application Areas

Medical imaging

Industrial control systems

Power quality monitoring

Multichannel data loggers

Product Lifecycle

The product status is Active

Not currently near discontinuation

Alternative products or upgrades are likely available in the Texas Instruments portfolio

Several Key Reasons to Choose This Product

High precision and resolution for accurate measurements

Capable of handling multiple signals simultaneously

Low power requirements suitable for portable or remote applications

Robust error detection capabilities ensure data integrity

Flexible voltage ranges catering to diverse electronic systems

Texas Instruments' strong reputation for producing reliable and long-lasting components

Frequently Asked Questions(FAQ)

How does the power consumption of the ADS131E08SPAGR compare to other 24-bit delta-sigma ADCs in its class when operating at a 10 kSPS data rate with all eight channels active?
At a typical 10 kSPS output data rate with all channels active, the ADS131E08SPAGR draws approximately 17.6 mW under mixed 3.3V analog and 1.8V digital supply conditions. This represents one of the lower power profiles among multi-channel 24-bit ADCs, making it suitable for battery-powered measurement systems where energy efficiency is critical. The device achieves this through integrated power management that allows per-channel shutdown and dynamic current scaling based on sampling frequency.
What are the key differences between the ADS131E08SPAGR and the ADS131M08 in terms of input conditioning and interface flexibility for industrial sensor applications?
While both share the same 24-bit resolution and eight-channel architecture, the ADS131E08SPAGR features an integrated programmable gain amplifier (PGA) with selectable gains up to ±4.5 V and built-in analog front-end filtering, whereas the ADS131M08 relies primarily on external signal conditioning. Additionally, the E08 variant supports differential inputs with higher common-mode rejection ratios, making it more suitable for noisy environments like motor drives or power monitoring. The M08 emphasizes higher throughput and SPI compatibility, while the E08 offers superior noise performance and integrated diagnostics.
Can the ADS131E08SPAGR be used directly with thermocouples without additional cold-junction compensation circuitry?
No, the ADS131E08SPAGR does not include internal cold-junction compensation required for direct thermocouple interfacing. It provides high-impedance, low-noise differential inputs ideal for amplifying weak signals but assumes the presence of an external reference junction sensor (such as an RTD or IC-based temperature sensor). Engineers must implement cold-junction compensation either via an external microcontroller reading a dedicated temperature sensor or using a companion IC designed for thermocouple applications, as the ADC itself lacks this functionality.
What is the effective number of bits (ENOB) expected when using the ADS131E08SPAGR in a precision pressure measurement system with a 2.5V excitation voltage and 100 Hz anti-aliasing filter?
Under these conditions—using the internal 2.5V reference, 100 Hz ODR, and 1x PGA gain—the ADS131E08SPAGR typically delivers an ENOB of around 21.5 bits. This performance assumes proper PCB layout, low-noise supply decoupling, and stable environmental conditions. The device’s integrated sinc⁵ filter provides excellent settling behavior, enabling accurate DC measurements common in pressure transducer applications where long-term stability matters more than high-speed conversion rates.
How does the ADS131E08SPAGR handle simultaneous channel sampling versus multiplexed sampling, and what impact does this have on vibration analysis applications?
The ADS131E08SPAGR employs true simultaneous sampling across all eight channels via independent delta-sigma modulators, eliminating phase misalignment inherent in time-multiplexed architectures. This capability is essential for vibration analysis where precise phase relationships between accelerometer channels are required to compute modal vectors or directional strain. Multiplexing would introduce timing skew that degrades spatial coherence; the simultaneous design preserves waveform integrity even at maximum data rates up to 32 kSPS per channel.
Is it feasible to daisy-chain multiple ADS131E08SPAGR devices over SPI for expanded channel counts in a distributed sensing array?
Yes, the ADS131E08SPAGR supports standard SPI communication and can be cascaded by connecting the DOUT pins of one device to the DIN pin of the next. However, careful attention must be paid to synchronization and frame alignment since each device generates its own conversion data stream independently. Clock stretching and interrupt-driven reads help manage latency, but software overhead increases with scale. For large arrays (>16 channels), consider dedicated front-end modules instead due to cumulative jitter and cable capacitance effects on signal integrity.
What precautions should be taken during PCB layout to maintain ADC performance when routing analog inputs near high-current digital traces on the same board as the ADS131E08SPAGR?
Maintain a minimum clearance of 3 mm between analog input traces and switching digital lines, use ground planes split only at the ADC’s AGND pin, and route all analog paths on the top layer with guard rings connected to clean analog ground. The ADS131E08SPAGR’s 24-bit resolution demands exceptional noise immunity; thus, bypass capacitors (100 nF ceramic + 10 µF tantalum) must be placed within 2 mm of each power pin, and input signals should pass through RC filters before entering the device to suppress high-frequency interference.
How does the ADS131E08SPAGR support diagnostic functions such as self-test and input short detection, and how can these aid in compliance with functional safety standards?
The ADS131E08SPAGR includes built-in self-test (BIST) capabilities that inject known test patterns into the ADC core to verify linearity and reference stability, along with automatic detection of input shorts or open circuits through internal impedance monitoring. These features enable runtime health checks without interrupting primary measurements, supporting SIL-2 or IEC 61508 compliance in condition-monitoring systems where fault detection latency impacts system reliability. Register flags indicate BIST status, allowing firmware to trigger alerts or enter safe states upon failure.
In what scenarios would the internal oscillator of the ADS131E08SPAGR be preferred over an external crystal, and what are the trade-offs?
The internal oscillator eliminates external components and reduces board space, making it ideal for cost-sensitive or compact designs where timing accuracy requirements are moderate—such as general-purpose data loggers or non-critical monitoring tasks. However, it exhibits slightly higher phase noise (±1% frequency tolerance) compared to a calibrated crystal reference, which may affect synchronization in multi-device systems or high-resolution FFT-based analysis. For applications demanding <0.1 ppm stability, an external crystal oscillator should be used despite added component count.
How does the supply voltage range (2.7V–5.25V analog, 1.8V–3.6V digital) of the ADS131E08SPAGR influence compatibility with legacy sensor interfaces?
The wide analog supply range allows direct connection to sensors requiring 3V or 5V excitation (e.g., piezoresistive pressure transducers or resistive temperature detectors), while the separate digital rail accommodates modern microcontrollers running at 1.8V or 3.3V. This dual-supply flexibility simplifies system integration without level-shifting circuitry, though care must be taken to ensure clean digital return currents do not couple into the sensitive analog domain. Power sequencing should follow analog-first, digital-second to prevent latch-up.
What role does the integrated digital filter play in mitigating aliasing when using the ADS131E08SPAGR with unconditioned sensor outputs?
The ADS131E08SPAGR includes a fifth-order sinc⁵ digital decimation filter that attenuates out-of-band noise by >100 dB down to very low frequencies, effectively acting as a post-conversion anti-aliasing filter. While it cannot replace an analog pre-filter entirely, it significantly relaxes external filtering requirements for signals band-limited to <1/2 the output data rate. For example, at 1 kSPS, signals above 500 Hz are suppressed by the filter, reducing reliance on bulky analog LPFs and improving transient response.
Can the ADS131E08SPAGR operate reliably in automotive-grade temperature ranges without additional thermal management?
Yes, the ADS131E08SPAGR is specified for industrial temperature operation (-40°C to +85°C) and maintains full functional performance across this range without derating. However, thermal performance depends on package dissipation: at 17.6 mW power, junction temperatures remain well below limits under normal airflow. For extended exposure to +85°C ambient, avoid placing heat-generating components adjacent to the 64-TQFP footprint and ensure adequate copper pour for conduction cooling if operating near maximum data rates continuously.
How does channel-to-channel crosstalk behave in the ADS131E08SPAGR when measuring small differential voltages (<1 mV) across adjacent channels?
Due to the fully differential, switched-capacitor architecture, channel isolation exceeds 120 dB at DC and remains above 90 dB up to 1 kHz, ensuring minimal crosstalk even when measuring microvolt-level signals. This makes the device suitable for bridge-based sensors like load cells where closely spaced inputs carry correlated but distinct signals. Real-world tests show coupling below 0.1 LSB under worst-case adjacent-channel excitation, provided layout symmetry and grounding are maintained.
What considerations apply when selecting the external reference voltage for the ADS131E08SPAGR to optimize long-term measurement stability?
Use a low-drift, low-noise voltage reference with temperature coefficient <2 ppm/°C and initial accuracy better than ±0.05% to preserve 24-bit effective resolution. Avoid references with high output impedance unless buffered, and ensure the reference’s power-down mode does not introduce glitches during startup. The ADS131E08SPAGR’s internal reference offers convenience but trades off absolute accuracy; for calibration-intensive applications, pair it with a precision shunt reference like REF50xx or use an external device such as the ADS127L01.
Does the ADS131E08SPAGR support burst read modes over SPI, and how does this benefit real-time control loops?
Yes, the device supports block read operations where all eight channel registers can be accessed sequentially without reconfiguring the address pointer, reducing SPI transaction overhead by up to 70%. This is particularly valuable in closed-loop control systems where rapid sensor updates dictate loop timing—for instance, motor current monitoring requiring 100 kSPS aggregate throughput. Burst mode minimizes CPU intervention and prevents missed conversions during tight ISRs, enhancing deterministic response.

Parts with Similar Specifications

The three parts on the right have similar specifications to Texas Instruments ADS131E08SPAGR

Product Attribute ADS131E08IPAGR ADS131E08SPAG ADS131E08IPAG ADS131E06IPAGR
Part Number ADS131E08IPAGR ADS131E08SPAG ADS131E08IPAG ADS131E06IPAGR
Manufacturer Texas Instruments Texas Instruments Texas Instruments Texas Instruments
Power (Watts) - - - -
Voltage - Supply, Analog - 3.14V ~ 3.46V 11.4V ~ 16.5V 3V ~ 3.6V
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Number of Bits - 16 8 14
Series - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Mounting Type - Surface Mount Through Hole Surface Mount
Number of Channels - - - -
Voltage - Supply, Digital - 1.14V ~ 1.26V 11.4V ~ 16.5V 1.65V ~ 3.6V

ADS131E08SPAGR Datasheet PDF

Download ADS131E08SPAGR pdf datasheets and Texas Instruments documentation for ADS131E08SPAGR - Texas Instruments.

PCN Design/Specification
Cylindrical Battery Holders.pdf
HTML Datasheet
Cylindrical Battery Holders.pdf
PCN Assembly/Origin
2.73KHz.pdf

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Customer Reviews

Evaluation: 10 Articles

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

  • Stev***aker
    May 20, 2026

    Solid diode for power rectification. Works well in switching circuits.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

  • Oliv***arris
    May 7, 2026

    Reliable I/O expander. Works well in embedded control applications.

  • Jess***Jones
    Apr 17, 2026

    It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

  • Mich***Smith
    Apr 17, 2026

    Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

  • Aman***arris
    Apr 3, 2026

    It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

  • Mike***nch
    Apr 3, 2026

    Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

  • Daic***K.
    Mar 23, 2026

    Very good. No issue after long time testing.

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ADS131E08SPAGR Image

ADS131E08SPAGR

Texas Instruments
32D-ADS131E08SPAGR

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