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Home > Products > Integrated Circuits (ICs) > Data Acquisition > Analog to Digital Converters (ADC)

Texas Instruments ADS8671IPWR

Name: ADS8671IPWR
Brand: Texas Instruments
SKU: ADS8671IPWR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ADS8671IPWR

Manufacturer:: Texas Instruments

Category:: Analog to Digital Converters (ADC)

Package:: 16-TSSOP (0.173", 4.40mm Width)

Datasheet:: ADS8671IPWR.pdf

Description:: IC ADC 14BIT SAR 16TSSOP

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Product details

Overview

ADS8671IPWR from Texas Instruments is a 14-bit, 1-MSPS successive approximation register (SAR) analog-to-digital converter with integrated analog front-end, programmable bipolar/unipolar input ranges (±12.288 V to ±2.56 V or 0–12.288 V), on-chip 4.096-V reference, and multiSPI™ interface. It operates from a single 5-V analog supply with 1.65–5-V I/O support and delivers ±0.4 LSB INL, 84.5 dB SNR, and ±20 V input overvoltage protection - deployed in industrial trackside signaling and high-precision data acquisition systems.

For engineers reviewing the ADS8671IPWR datasheet, ADS8671IPWR pinout, ADS8671IPWR application, or ADS8671IPWR equivalent, this page provides verified technical context, exact pin functions, real-world use cases, and validated alternative options for analog input modules, mixed-signal I/O systems, and ruggedized DAQ designs requiring stable dc precision and software-configurable range selection.

Technical Context

The ADS8671IPWR implements a true single-supply SAR ADC architecture with integrated PGA, second-order LPF, overvoltage protection circuitry, and internal reference buffer - enabling direct connection to ±20 V field signals without external level-shifting. Its software-programmable gain/offset calibration ensures <±0.2 mV offset error and <±0.01% FSR gain error across all eight supported input ranges.

MultiSPI™ interface supports daisy-chain configuration, backward-compatible SPI timing, and source-synchronous modes (internal or external clock), with RVS and ALARM outputs providing real-time conversion status and programmable high/low threshold alerts. The device maintains constant ≥1 MΩ resistive input impedance regardless of selected range.

Key Specifications

Parameter	Value and Actual Design Meaning
Resolution	14-bit - delivers 16,384 discrete output codes for high-fidelity signal digitization in precision measurement.
Sampling Rate	1 MSPS - enables real-time capture of fast transients in industrial control loops and trackside monitoring.
INL / DNL	±0.4 LSB / ±0.25 LSB - ensures monotonicity and accurate end-point linearity for closed-loop feedback accuracy.
SNR / THD	84.5 dB / –105 dB - supports clean digitization of low-distortion sensor signals in noisy industrial environments.
Input Ranges	Software-selectable ±12.288 V, ±10.24 V, ±6.144 V, ±5.12 V, ±2.56 V, or 0–12.288 V, 0–10.24 V, 0–6.144 V, 0–5.12 V - eliminates external gain-switching hardware.
Overvoltage Protection	±20 V (AVDD = 5 V) - withstands cable fault surges and ESD events without damage or latch-up in field-deployed systems.
Reference	On-chip 4.096-V reference with 4 ppm/°C drift - removes need for external precision reference and reduces BOM count.
Operating Temp	–40°C to +125°C - qualified for under-hood, rail-side, and factory-floor applications without derating.

Pinout & Package

TSSOP-16 package (5.00 mm × 4.40 mm), thermally enhanced for industrial ambient operation; pinout validated per TI SBAS779B Rev. B (March 2021), Figure 5-1 and Table 5-1.

Pin/Terminal	Circuit Role	Design Meaning
AIN_P	Analog input (positive)	Main signal input node; accepts full-scale voltages up to ±12.288 V with ≥1 MΩ impedance and ±20 V OVP.
AIN_GND	Analog input (negative)	Differential reference for AIN_P; specified operating range –0.1 V to +0.1 V relative to system ground.
CONVST/CS	Dual-function digital input	Rising edge initiates conversion (CONVST); low level enables serial bus access (CS) and tri-states SDO outputs.
SCLK	Serial clock input	Timing master for multiSPI™ interface; supports up to 66.67 MHz clock rate for high-throughput data streaming.
SDI	Serial data input	Accepts command registers and configuration writes; supports daisy-chain mode as chain input in multi-device systems.
SDO-0	Primary serial data output	Delivers 14-bit conversion result MSB-first; active only when CS is low and RVS indicates valid data ready.
ALARM/SDO-1/GPO	Multi-function output	Active-high alarm flag triggered by programmable high/low thresholds; also serves as secondary data output or GPIO.
RST	Asynchronous reset input	Active-low signal that forces device into known state; minimum pulse width 100 ns, with 20-ms POR delay.
RVS	Conversion status indicator	Reflects internal ADCST signal; goes high at start of conversion and low at completion - used for timing synchronization.
REFIO	Reference I/O	Configurable as 4.096-V reference output or external reference input (4.046–4.146 V); requires 4.7-µF decoupling.
REFCAP	Reference capacitor terminal	Connects to 10-µF decoupling capacitor for internal reference stability; critical for <4 ppm/°C drift performance.
AGND / DGND / REFGND	Ground terminals	Separate analog, digital, and reference ground pins - must be shorted at single point on PCB to minimize noise coupling.
AVDD / DVDD	Power supplies	AVDD = 4.75–5.25 V (analog core); DVDD = 1.65–3.3 V (digital I/O); independent decoupling required per datasheet layout guidelines.

Key Features

Feature	Design Value
Programmable bipolar/unipolar input ranges	Eight software-selectable spans (e.g., ±12.288 V, 0–10.24 V) eliminate external gain-setting resistors and reduce calibration overhead.
Integrated 4.096-V reference with low drift	4 ppm/°C temperature coefficient and 20-ms turn-on time enable self-contained, high-stability measurement without external references.
Constant ≥1 MΩ input impedance	Maintains consistent loading across all input ranges - prevents signal attenuation errors when interfacing with high-Z sensors or legacy transmitters.
multiSPI™ daisy-chain capability	Enables synchronous sampling across multiple ADS8671IPWR devices using shared SCLK/CS lines - simplifies multi-channel DAQ system design.
ALARM output with programmable thresholds	Hardware-level over/under-range detection reduces host MCU interrupt load and enables fail-safe response in safety-critical trackside controls.
Extended industrial temperature range	Full 14-bit performance guaranteed from –40°C to +125°C - suitable for uncooled enclosures in rail infrastructure and factory automation.

Applications

Analog Input Modules	Mixed I/O Modules
Use Scenario: Rack-mounted PLC analog input cards acquiring voltage signals from pressure, temperature, and position sensors in manufacturing cells. IC Role / Device Role / Timing Role: Primary ADC with integrated front-end, handling ±10.24 V field signals while maintaining <±0.4 LSB INL across temperature. Use Value: Eliminates external signal conditioning, reduces channel-to-channel crosstalk via isolated AGND/DGND routing, and supports hot-swap diagnostics via ALARM output.	Use Scenario: Compact industrial I/O modules combining AI, AO, DI, and DO on a single PCB for distributed control in packaging machinery. IC Role / Device Role / Timing Role: High-speed, software-configurable ADC subsystem synchronized via multiSPI™ daisy-chain with companion DACs and isolators. Use Value: Enables unified firmware control of input range selection and alarm thresholds across multiple channels, reducing configuration complexity.
Data Acquisition Systems	Trackside Signaling & Control
Use Scenario: Portable and fixed DAQ units capturing vibration, acoustic emission, and thermal profiles in predictive maintenance deployments. IC Role / Device Role / Timing Role: 1-MSPS SAR ADC delivering 84.5 dB SNR for FFT-based spectral analysis of rotating equipment. Use Value: On-chip reference and constant input impedance ensure repeatable measurements across battery-powered and mains-powered units.	Use Scenario: Rail signaling interfaces monitoring track circuit voltages and axle counter signals in outdoor cabinets exposed to wide thermal swings. IC Role / Device Role / Timing Role: Ruggedized ADC with ±20 V OVP and –40°C to +125°C operation, directly connected to 60-V track circuits. Use Value: Survives lightning-induced surges and eliminates need for external TVS arrays, reducing failure rates in harsh railway environments.

Analog Input Modules

Mixed I/O Modules

Use Scenario: Rack-mounted PLC analog input cards acquiring voltage signals from pressure, temperature, and position sensors in manufacturing cells.

IC Role / Device Role / Timing Role: Primary ADC with integrated front-end, handling ±10.24 V field signals while maintaining <±0.4 LSB INL across temperature.

Use Value: Eliminates external signal conditioning, reduces channel-to-channel crosstalk via isolated AGND/DGND routing, and supports hot-swap diagnostics via ALARM output.

Use Scenario: Compact industrial I/O modules combining AI, AO, DI, and DO on a single PCB for distributed control in packaging machinery.

IC Role / Device Role / Timing Role: High-speed, software-configurable ADC subsystem synchronized via multiSPI™ daisy-chain with companion DACs and isolators.

Use Value: Enables unified firmware control of input range selection and alarm thresholds across multiple channels, reducing configuration complexity.

Data Acquisition Systems

Trackside Signaling & Control

Use Scenario: Portable and fixed DAQ units capturing vibration, acoustic emission, and thermal profiles in predictive maintenance deployments.

IC Role / Device Role / Timing Role: 1-MSPS SAR ADC delivering 84.5 dB SNR for FFT-based spectral analysis of rotating equipment.

Use Value: On-chip reference and constant input impedance ensure repeatable measurements across battery-powered and mains-powered units.

Use Scenario: Rail signaling interfaces monitoring track circuit voltages and axle counter signals in outdoor cabinets exposed to wide thermal swings.

IC Role / Device Role / Timing Role: Ruggedized ADC with ±20 V OVP and –40°C to +125°C operation, directly connected to 60-V track circuits.

Use Value: Survives lightning-induced surges and eliminates need for external TVS arrays, reducing failure rates in harsh railway environments.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-precision, programmable-range SAR ADC applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADS8675IPWR	Same family, 500-kSPS sampling rate, identical pinout and feature set except lower throughput and longer tACQ (1000 ns vs. 335 ns).	Better suited for lower-bandwidth applications where power consumption (5.25 mA vs. 6.7 mA AVDD dynamic current) is prioritized over speed.	Select ADS8675IPWR when system sampling requirements are ≤500 kSPS and thermal budget is constrained.
AD7606C-16BSTZ	16-bit, 1-MSPS, ±10 V fixed-range input, no software-programmable bipolar/unipolar selection; requires external reference and has different SPI timing.	Used in lab-grade DAQ where resolution >14-bit is mandatory, but field adaptability to varying sensor outputs is not required.	Choose AD7606C-16BSTZ only if 16-bit resolution is essential and input signal range is fixed; ADS8671IPWR offers superior flexibility and integration.

Compared with ADS8675IPWR and AD7606C-16BSTZ, the ADS8671IPWR uniquely combines 1-MSPS speed, software-configurable input ranges, integrated reference, and ±20 V OVP in a single TSSOP-16 package - making it optimal for field-deployable systems requiring reconfigurability without hardware changes.

Availability

ADS8671IPWR is available at Aetrix Electronics and suitable for analog input modules, mixed-signal I/O systems, and trackside signaling applications requiring stable component supply, long-term industrial lifecycle support, and guaranteed extended temperature performance.

Supply support for ADS8671IPWR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies for industrial, automotive, and communications markets.

The ADS867x family was designed specifically for high-reliability industrial data acquisition - integrating precision SAR conversion, programmable analog front-end, and robust digital interface into a single chip to replace multi-component signal chains.

FAQ

What is the maximum sampling rate of the ADS8671IPWR?

The ADS8671IPWR achieves a maximum throughput rate of 1 million samples per second (1 MSPS) with no latency, as confirmed in Section 6.5 and 6.6 of the SBAS779B datasheet. This performance is maintained across all supported input ranges and operating temperatures from –40°C to +125°C, enabled by its optimized SAR architecture and 66.67-MHz multiSPI™ interface clock support.

Does the ADS8671IPWR require an external reference voltage?

No, the ADS8671IPWR does not require an external reference voltage because it integrates a highly stable 4.096-V internal reference with only 4 ppm/°C temperature drift. The REFIO pin can be configured as a reference output, and the REFCAP pin must be decoupled with a 10-µF capacitor to maintain this specification - eliminating external reference components in most designs.

How does the programmable input range work on the ADS8671IPWR?

The ADS8671IPWR supports eight software-programmable input ranges - five bipolar (±12.288 V, ±10.24 V, ±6.144 V, ±5.12 V, ±2.56 V) and three unipolar (0–12.288 V, 0–10.24 V, 0–6.144 V, 0–5.12 V) - selected by writing to internal configuration registers via the multiSPI™ interface. Gain and offset errors are factory-trimmed per range to ensure <±0.2 mV offset and <±0.01% FSR gain error.

What protection features does the ADS8671IPWR include against input overvoltage?

The ADS8671IPWR includes integrated input overvoltage protection rated for ±20 V when AVDD = 5 V, and ±15 V when AVDD is floating, as specified in Section 6.1 Absolute Maximum Ratings and Section 6.5 Electrical Characteristics. This protection operates independently of the selected input range and prevents damage during field wiring faults or ESD events without requiring external clamping components.

Can multiple ADS8671IPWR devices be connected in daisy-chain configuration?

Yes, the ADS8671IPWR supports daisy-chain operation via its multiSPI™ interface: SDI of the first device connects to SDO-0 of the next, with shared SCLK and CONVST/CS lines. The ALARM/SDO-1 pin provides a secondary data path, and RVS enables synchronized sampling across the chain - all documented in Sections 7.3 and 6.11 of the SBAS779B datasheet.

ADS8671IPWR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: 16-TSSOP (0.173", 4.40mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Number of Bits:: 14

Sampling Rate (Per Second):: 1M

Number of Inputs:: 1

Input Type:: Differential, Pseudo-Differential, Single Ended

Data Interface:: SPI

Configuration:: PGA-ADC

Ratio - S/H:ADC:: 0:1

Number of A/D Converters:: 1

Architecture:: SAR

Reference Type:: Internal

Voltage - Supply, Analog:: 4.75V ~ 5.25V

Voltage - Supply, Digital:: 1.7V ~ 3.3V

Features:: Internal Oscillator

Operating Temperature:: -40°C ~ 125°C

Supplier Device Package:: 16-TSSOP

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

ADS8671IPWR FAQ

1.How can I place an order for ADS8671IPWR through Aetrix?

Please submit a Request for Quotation (RFQ) for ADS8671IPWR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for ADS8671IPWR reliable?

The price and inventory of ADS8671IPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8671IPWR is usually 5 days.

3.What payment methods are accepted for ADS8671IPWR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8671IPWR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ADS8671IPWR?

ADS8671IPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ADS8671IPWR order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for ADS8671IPWR?

For technical support, including ADS8671IPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8671IPWR requirements.

6.How does Aetrix verify that ADS8671IPWR is sourced from the original manufacturer or authorized distributors?

All ADS8671IPWR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADS8671IPWR meets industry standards.

7.What is the process for return or replacement of ADS8671IPWR?

All ADS8671IPWR units undergo pre-shipment inspection (PSI). If there is an issue with ADS8671IPWR, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The ADS8671IPWR part is unused and in its original packaging.

Return procedure for ADS8671IPWR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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