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Texas Instruments ADS8671IPW
- Part No.:
- ADS8671IPW
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADS8671IPW.pdf
- Description:
- IC ADC 14BIT SAR 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,721
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Product details
Overview
ADS8671IPW 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 low-drift reference, and multiSPI™ interface. It operates from a single 5-V analog supply with 1.65–5-V I/O compatibility and delivers ±0.4 LSB INL, 84.5 dB SNR, and ±20-V input overvoltage protection - enabling high-precision data acquisition in trackside signaling and industrial analog input modules.
For engineers reviewing the ADS8671IPW datasheet, ADS8671IPW pinout, ADS8671IPW application, or ADS8671IPW equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, confirmed alternatives for system-level flexibility, and supply-chain support tailored for industrial DAQ and mixed-signal module development.
Technical Context
The ADS8671IPW implements a true single-supply SAR architecture with integrated PGA, second-order LPF, and overvoltage protection circuitry rated for ±20 V (AVDD = 5 V). Its software-programmable input range selection uses internal register writes to configure gain/offset trimming per range, ensuring dc precision without external calibration.
It supports three serial interface modes: standard SPI (CPOL/CPHA configurable), multiSPI daisy-chain (dual SDO), and source-synchronous modes (internal or external clock). The RVS pin provides real-time ADC status, while ALARM/SDO-1/GPO offers threshold-triggered interrupt capability - all operating across –40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit - delivers 16,384 discrete output codes for high-fidelity signal digitization in precision DAQ systems. |
| Sampling Rate | 1 MSPS - enables real-time capture of fast transients up to ~400 kHz (Nyquist-limited) in trackside monitoring or motor control feedback loops. |
| INL / DNL | ±0.4 LSB / ±0.25 LSB - ensures monotonicity and minimal code-width variation, critical for closed-loop control accuracy and calibration traceability. |
| SNR / THD | 84.5 dB / –105 dB - supports high dynamic range measurement of low-amplitude signals amid noise, e.g., sensor outputs in mixed AI/AO modules. |
| 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 scaling circuitry and simplifies multi-range system design. |
| Overvoltage Protection | ±20 V (AVDD = 5 V) - safeguards against field-wiring faults and ESD events in harsh industrial environments without external clamping diodes. |
| Reference | On-chip 4.096-V reference with 4 ppm/°C drift - removes need for external precision reference and reduces BOM count in space-constrained analog input modules. |
Pinout & Package
The ADS8671IPW is housed in a 16-pin TSSOP (PW) package measuring 5.00 mm × 4.40 mm, optimized for thermal performance (RθJA = 95.7°C/W) and PCB area efficiency in industrial control modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN_P / AIN_GND | Differential analog input pair | Accepts fully differential or pseudo-differential signals; maintains ≥1 MΩ input impedance regardless of selected range - simplifies sensor interfacing without loading effects. |
| CONVST/CS | Dual-function digital input | Active-high conversion trigger or active-low chip select - enables flexible timing control and multi-device SPI bus sharing in modular DAQ systems. |
| SDO-0 / SDO-1 | Serial data outputs | Supports daisy-chain configuration (SDO-1 → SDI of next device) - reduces host GPIO count when cascading multiple ADS8671IPW units in analog input racks. |
| ALARM/SDO-1/GPO | Multi-function output | Asserts high when input exceeds user-defined high/low thresholds - provides hardware-level fault indication without CPU polling in safety-critical trackside applications. |
| RVS | Real-time ADC status indicator | Reflects internal ADCST signal; transitions high at end of conversion - enables precise timing synchronization for deterministic data capture in time-sensitive control loops. |
| REFIO / REFCAP | Reference buffer I/O and decoupling | REFIO supplies 4.096 V reference; REFCAP requires 10-μF capacitor - ensures stable reference voltage under dynamic load, critical for maintaining full-scale accuracy across temperature. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable bipolar/unipolar input ranges | Eight software-configurable ranges eliminate external gain-switching circuitry and reduce layout complexity in multi-channel analog input modules. |
| Integrated 4.096-V reference with 4 ppm/°C drift | Removes dependency on external reference ICs and associated decoupling, cutting BOM cost and board area by ~30% in compact DAQ designs. |
| Constant ≥1 MΩ input impedance across all ranges | Prevents signal attenuation and gain error variation when switching ranges - essential for consistent accuracy in mixed-signal test equipment. |
| multiSPI™ interface with daisy-chain support | Enables scalable expansion of channel count using a single SPI bus, reducing host controller resource usage in distributed I/O systems. |
| ±20-V input overvoltage protection (AVDD = 5 V) | Withstands transient surges common in rail signaling or factory floor wiring - increases system robustness and reduces field failure rates. |
Applications
| Analog Input Modules | Mixed Signal Modules (AI/AO/DI/DO) |
|---|---|
|
Use Scenario: Rack-mounted industrial I/O modules acquiring voltage/current signals from sensors, transmitters, and actuators. IC Role / Device Role / Timing Role: Primary ADC for high-accuracy analog input channel with programmable range and integrated reference. Use Value: Reduces external component count by integrating PGA, reference, and OVP - lowering bill-of-materials cost and improving long-term calibration stability. |
Use Scenario: Compact PLC backplane modules supporting simultaneous analog input, analog output, digital input, and digital output functions. IC Role / Device Role / Timing Role: High-speed, isolated analog input subsystem with deterministic conversion timing via RVS pin. Use Value: Enables synchronized sampling across multiple channels using multiSPI daisy-chain - critical for phase-accurate motor current monitoring. |
| Data Acquisition Systems (DAQ) | Trackside Signaling & Control |
|
Use Scenario: Portable or benchtop DAQ units capturing waveforms from vibration sensors, strain gauges, and thermocouples. IC Role / Device Role / Timing Role: Precision SAR ADC with 84.5 dB SNR and ±0.4 LSB INL for high-fidelity signal reconstruction. Use Value: Delivers laboratory-grade resolution without external op-amps or references - accelerating time-to-market for mid-tier test equipment. |
Use Scenario: Wayside electronics monitoring rail track voltage, occupancy detection, and switch position feedback in harsh outdoor environments. IC Role / Device Role / Timing Role: Fault-tolerant analog front-end with ±20-V OVP and –40°C to +125°C operation for unattended deployment. Use Value: Eliminates need for external TVS diodes and reference buffers - enhancing reliability and reducing maintenance frequency in remote infrastructure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8675IPW | Same family, 500-kSPS sampling rate, identical pinout and feature set except lower throughput. | Preferred where lower sampling rate suffices and power consumption must be minimized (IAVDD_DYN = 5.25–6.75 mA vs. 6.7–8.6 mA). | Select ADS8675IPW for cost-sensitive or thermally constrained applications requiring ≤500 kSPS. |
| AD7606C-16BSTZ | 16-bit, 1-MSPS, ±10-V input range only, no software-programmable ranges; requires external reference and separate power supplies for analog/digital sections. | Suitable for applications needing higher resolution but fixed input scaling and tighter SNR (102 dB) - not drop-in compatible due to different pinout and interface protocol. | Choose AD7606C-16BSTZ only when 16-bit resolution is mandatory and system design accommodates external reference and dual-supply routing. |
Compared with ADS8671IPW, ADS8675IPW offers identical functionality at reduced speed and power, while AD7606C-16BSTZ trades programmability and integration for higher resolution and SNR - making ADS8671IPW optimal for flexible, single-supply, wide-range industrial DAQ where software configurability and BOM simplicity are prioritized.
Availability
ADS8671IPW is available at Aetrix Electronics and suitable for analog input modules, mixed-signal PLC backplanes, and trackside signaling systems requiring stable component supply, extended temperature operation, and long-term industrial lifecycle support.
Supply support for ADS8671IPW 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 power management technologies, with decades of heritage in high-reliability industrial and automotive solutions.
The ADS867x family was designed specifically for rugged, software-configurable data acquisition in industrial automation, energy infrastructure, and transportation systems - emphasizing integration, fault tolerance, and extended temperature operation.
FAQ
What is the maximum sampling rate of the ADS8671IPW?
The ADS8671IPW achieves a maximum throughput rate of 1 million samples per second (1 MSPS) under recommended operating conditions (AVDD = 5 V, DVDD = 3.3 V). This is confirmed in Section 6.6 of the SBAS779B datasheet, where tconv = 665 ns and tacq = 335 ns yield a total cycle time of 1 µs. The ADS8671IPW maintains this rate across all supported input ranges and temperature extremes (–40°C to +125°C).
Does the ADS8671IPW require an external reference voltage?
No, the ADS8671IPW includes a highly stable on-chip 4.096-V reference with only 4 ppm/°C temperature drift, eliminating the need for an external reference in most applications. The REFIO pin can be configured as a reference output, and the REFCAP pin requires a 10-µF decoupling capacitor. External reference mode is optional and supported only if higher initial accuracy or custom reference voltage is required - but it is not necessary for standard operation of the ADS8671IPW.
How does the programmable input range work on the ADS8671IPW?
The ADS8671IPW uses internal register writes via its multiSPI™ interface to select among eight input ranges: five bipolar (±12.288 V to ±2.56 V) and four unipolar (0–12.288 V to 0–5.12 V). Gain and offset errors are factory-trimmed per range to ensure dc precision, and input impedance remains ≥1 MΩ regardless of selection. This software-based configuration replaces external resistor networks and relays, enabling runtime reconfiguration in adaptive DAQ systems without hardware changes to the ADS8671IPW circuit.
What is the purpose of the RVS pin on the ADS8671IPW?
The RVS pin on the ADS8671IPW provides real-time status of the internal ADC conversion cycle: it goes high at the end of conversion and remains high until the next CONVST rising edge. When CS is held high, RVS directly reflects the ADCST signal; when CS is low, its behavior depends on the selected serial protocol. This pin enables precise hardware synchronization - for example, triggering DMA transfers or timestamping samples in deterministic control applications - without relying on software polling of the ADS8671IPW status register.
Is the ADS8671IPW pin-compatible with other devices in the ADS867x family?
Yes, the ADS8671IPW shares identical pinout, package (16-pin TSSOP), and register map with the ADS8675IPW, allowing direct PCB reuse between the two variants. Both devices use the same footprint, power sequencing, and interface timing - differing only in maximum sampling rate (1 MSPS vs. 500 kSPS) and dynamic power consumption. This pin compatibility simplifies design scalability and inventory consolidation for manufacturers deploying multiple performance tiers using the ADS8671IPW and ADS8675IPW.
ADS8671IPW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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:
- -
ADS8671IPW FAQ
1.How can I place an order for ADS8671IPW through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8671IPW 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 ADS8671IPW reliable?
The price and inventory of ADS8671IPW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8671IPW is usually 5 days.
3.What payment methods are accepted for ADS8671IPW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8671IPW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8671IPW?
ADS8671IPW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8671IPW 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 ADS8671IPW?
For technical support, including ADS8671IPW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8671IPW requirements.
6.How does Aetrix verify that ADS8671IPW is sourced from the original manufacturer or authorized distributors?
All ADS8671IPW 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 ADS8671IPW meets industry standards.
7.What is the process for return or replacement of ADS8671IPW?
All ADS8671IPW units undergo pre-shipment inspection (PSI). If there is an issue with ADS8671IPW, 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 ADS8671IPW part is unused and in its original packaging.
Return procedure for ADS8671IPW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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