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Texas Instruments ADS1271IPWG4
- Part No.:
- ADS1271IPWG4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADS1271IPWG4.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,794
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Product details
Overview
ADS1271IPWG4 from Texas Instruments is a 24-bit delta-sigma analog-to-digital converter (ADC) optimized for high-precision industrial measurement. It delivers 105kSPS data rate in High-Speed mode, 109dB SNR in High-Resolution mode, and 35mW power dissipation in Low-Power mode, with ±VREF full-scale input and operation across −40°C to +105°C. It serves as the front-end digitizer in multichannel vibration analysis and dynamic sensor systems.
For engineers reviewing the ADS1271IPWG4 datasheet, ADS1271IPWG4 pinout, ADS1271IPWG4 application, or ADS1271IPWG4 equivalent, this page provides verified technical context, mode-specific performance tradeoffs, daisy-chainable serial interface behavior, modulator output access capability, and real-world design meaning for offset drift (1.8µV/°C), gain drift (2ppm/°C), and passband ripple (±0.005dB).
Technical Context
The ADS1271IPWG4 integrates a 6th-order chopper-stabilized delta-sigma modulator with an on-chip linear-phase FIR decimation filter. Its modulator achieves low in-band noise and minimal drift by combining chopping with high-order noise shaping.
Three pin-driven operating modes-High-Speed (105kSPS), High-Resolution (109dB SNR), and Low-Power (35mW)-enable system-level optimization without register programming. The device supports both SPI and Frame-Sync serial interfaces, with daisy-chain capability and external synchronization via SYNC/PDWN and DRDY/FSYNC pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit, no missing codes - guarantees monotonicity and full dynamic range utilization in precision measurement. |
| Data Rate (High-Speed) | 105,469 SPS - enables real-time capture of signals up to 47.8kHz bandwidth with <0.005dB passband ripple. |
| SNR (High-Resolution) | 109 dB - corresponds to ~6.5µVRMS input-referred noise, suitable for sub-microvolt signal detection. |
| Offset Drift | 1.8 µV/°C - ensures <±0.2mV total offset shift over −40°C to +105°C, critical for unattended long-duration measurements. |
| Gain Drift | 2 ppm/°C - limits full-scale error to <±0.02% across industrial temperature range, eliminating frequent recalibration. |
| Power Dissipation (Low-Power) | 35 mW - reduces thermal load in dense multichannel DAQ systems while maintaining 106dB SNR. |
| Digital Supply Range | 1.65 V to 3.6 V - supports direct interfacing with 1.8V or 3.3V microcontrollers and FPGAs without level-shifting. |
Pinout & Package
TSSOP-16 (PW) package with 0.65mm pitch, thermally enhanced for stable operation at +105°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AINP / AINN | Differential Analog Input | Accepts ±VREF differential signal; input impedance varies by mode (16.4kΩ or 32.8kΩ), requiring matched drive circuitry. |
| VREFP / VREFN | Differential Reference Input | Defines full-scale range; reference impedance is 4.2kΩ (HS/HR) or 8.4kΩ (LP), demanding low-impedance reference source. |
| MODE | Operating Mode Control | Logic level selects High-Speed (0), High-Resolution (float), or Low-Power (1); no software configuration required. |
| FORMAT | Interface Selection | Selects SPI (0), Frame-Sync (1), or modulator output (float on ADS1271B only); determines DRDY/FSYNC function. |
| SYNC/PDWN | Synchronization & Power-Down | Active-low input synchronizes conversion start or enters ultra-low-power state (<10µA at ≤85°C). |
| DOUT / DIN | Serial Data I/O | Supports daisy-chaining multiple ADS1271IPWG4 devices; DOUT drives next device's DIN with no external logic. |
| DRDY/FSYNC | Mode-Dependent Control | Outputs data-ready strobe in SPI mode; accepts frame-sync trigger in Frame-Sync mode for multichannel alignment. |
| SCLK | Serial Clock | Timing source for data retrieval; clock rate scales with data rate (64×fDATA in HS, 128×fDATA in HR). |
Key Features
| Feature | Design Value |
|---|---|
| Pin-driven configuration | Eliminates firmware register writes; all modes and interfaces set by hardwired MODE/FORMAT/SYNC pins. |
| Daisy-chainable serial interface | Enables scalable multichannel acquisition with single controller SCLK/DIN/DRDY lines and minimal PCB routing. |
| Modulator output access | Provides raw bitstream for custom digital filtering or oversampling applications beyond onboard FIR capabilities. |
| Linear-phase FIR filter | Delivers flat group delay and <0.005dB passband ripple, preserving phase coherence in modal analysis waveforms. |
| On-command internal offset calibration | Reduces system-level offset errors without interrupting continuous acquisition; triggered by toggling SYNC/PDWN. |
Applications
| Vibration/Modal Analysis | Acoustics |
|---|---|
Use Scenario: Multi-axis structural health monitoring of rotating machinery using MEMS accelerometers and piezoelectric sensors. IC Role / Device Role / Timing Role: Primary ADC capturing broadband vibration spectra up to 47.8kHz with synchronized sampling across 8+ channels. Use Value: 109dB SNR and 1.8µV/°C offset drift ensure detection of sub-threshold resonance peaks and long-term baseline stability during extended run-time tests. | Use Scenario: High-fidelity sound pressure mapping in anechoic chambers and acoustic emission testing of composite materials. IC Role / Device Role / Timing Role: Precision digitizer for condenser microphone preamplifier outputs, supporting 105kSPS burst capture and time-aligned multi-mic arrays. Use Value: −108dB THD and linear-phase response preserve harmonic integrity and transient fidelity essential for spectral decomposition and beamforming algorithms. |
| Dynamic Strain Gauges | Pressure Sensors |
Use Scenario: Real-time strain monitoring on aerospace components under cyclic mechanical loading with Wheatstone bridge transducers. IC Role / Device Role / Timing Role: Bridge excitation and ratiometric digitization front-end, rejecting common-mode noise from cable runs and EMI. Use Value: 90–100dB CMRR at 60Hz and 2ppm/°C gain drift maintain accuracy despite thermal gradients and ground-loop interference in flight-test harnesses. | Use Scenario: High-reliability engine manifold pressure sensing in automotive and industrial combustion systems. IC Role / Device Role / Timing Role: Signal conditioner for piezoresistive pressure elements, operating continuously at +105°C ambient with calibrated DC accuracy. Use Value: Specified operation from −40°C to +105°C, 1.8µV/°C offset drift, and 35mW low-power mode enable robust deployment in under-hood environments without forced cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision delta-sigma ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS127L11IPWR | 24-bit, 400kSPS, lower power (22mW), but reduced SNR (103dB) and narrower temp range (−40°C to +85°C). | Targeted at portable battery-powered test equipment where speed outweighs ultimate SNR. | Choose ADS127L11IPWR when higher throughput and lower power are prioritized over 109dB SNR and extended temperature operation. |
| AD7768-1BCPZ | 24-bit, 256kSPS, integrated buffer, but requires SPI register configuration and lacks pin-driven mode selection. | Suited for FPGA-based systems with flexible control architecture and need for on-chip programmable filters. | Choose AD7768-1BCPZ when system firmware can manage register writes and buffered inputs simplify analog front-end design. |
Compared with ADS127L11IPWR and AD7768-1BCPZ, the ADS1271IPWG4 uniquely combines pin-strapped mode selection, 109dB SNR at 52.7kSPS, and guaranteed −40°C to +105°C operation-making it optimal for unattended, multichannel industrial DAQ where configurability, stability, and simplicity are non-negotiable.
Availability
ADS1271IPWG4 is available at Aetrix Electronics and suitable for vibration analysis, acoustic sensing, dynamic strain measurement, and high-reliability pressure monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADS1271IPWG4 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 and embedded processing technologies, with decades of expertise in precision data converters and industrial-grade IC design.
The ADS1271 product line was engineered for high-channel-count, high-accuracy industrial data acquisition systems-emphasizing drift stability, AC/DC performance balance, and hardware-configurable operation in harsh environments.
FAQ
What are the three operating modes of the ADS1271IPWG4 and how do they affect performance?
The ADS1271IPWG4 offers High-Speed (105kSPS, 106dB SNR), High-Resolution (52.7kSPS, 109dB SNR), and Low-Power (52.7kSPS, 35mW) modes. Each is selected via the MODE pin-no registers required. High-Speed maximizes throughput for transient capture; High-Resolution optimizes noise floor for static or low-frequency signals; Low-Power reduces thermal load in dense multichannel systems while retaining 106dB SNR. All modes retain the same 24-bit resolution and ±VREF input range. The ADS1271IPWG4 maintains consistent INL (±0.0006%FSR) and CMRR (>90dB) across all modes.
Does the ADS1271IPWG4 require external configuration registers or firmware initialization?
No. The ADS1271IPWG4 uses pin-driven control: MODE, FORMAT, and SYNC/PDWN pins directly configure operating mode, serial interface type, and power state. There are no internal registers to program, eliminating startup delays, configuration errors, and firmware dependencies. This simplifies integration into FPGA, MCU, or DSP systems-especially in safety-critical or resource-constrained environments. The ADS1271IPWG4 begins valid conversion immediately after power-up and stable clock application, with no initialization sequence required.
Can the ADS1271IPWG4 interface with a 1.8V microcontroller without level shifting?
Yes. The ADS1271IPWG4 supports DVDD from 1.65V to 3.6V, and its digital I/O thresholds scale accordingly: VIH = 0.7×DVDD and VIL = 0.3×DVDD. When powered from 1.8V, it accepts 1.26V as high and 0.54V as low-fully compatible with standard 1.8V logic families. No level-shifting circuitry is needed for SCLK, DOUT, DIN, or DRDY/FSYNC signals. The ADS1271IPWG4 also tolerates 20pF load on DOUT and specifies tDOHD (5ns) and tDOPD (12ns) timing margins that accommodate typical 1.8V MCU GPIO drive strengths.
What is the purpose of the modulator output option on the ADS1271IPWG4?
The modulator output option (enabled by floating the FORMAT pin) provides access to the raw 1-bit bitstream from the delta-sigma modulator-bypassing the onboard FIR filter. This allows custom digital filtering, oversampling, or real-time signal processing in FPGA or DSP resources. It is particularly valuable for applications requiring user-defined noise-shaping, adaptive filtering, or specialized decimation algorithms not supported by the fixed FIR. Note that modulator output is only functional on the ADS1271B grade; the ADS1271IPWG4 supports SPI and Frame-Sync formats but not modulator output.
How does the ADS1271IPWG4 achieve synchronization across multiple devices in a daisy-chain configuration?
The ADS1271IPWG4 supports precise multichannel synchronization via its SYNC/PDWN and DRDY/FSYNC pins. In Frame-Sync mode, an external FSYNC pulse aligns conversion start across all chained devices; in SPI mode, a common SYNC/PDWN pulse triggers simultaneous sampling. Daisy-chaining uses DOUT-to-DIN cascading with shared SCLK and DRDY lines-eliminating per-device clock skew. The ADS1271IPWG4 guarantees <10ns inter-device sampling skew under matched layout conditions, enabling coherent wideband analysis in systems with 16+ channels.
ADS1271IPWG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Number of Bits:
- 24
- Sampling Rate (Per Second):
- 105k
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- SPI
- Configuration:
- ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- External
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 1.65V ~ 3.6V
- Features:
- -
- Operating Temperature:
- -40°C ~ 105°C
- Supplier Device Package:
- 16-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS1271IPWG4 FAQ
1.How can I place an order for ADS1271IPWG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS1271IPWG4 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 ADS1271IPWG4 reliable?
The price and inventory of ADS1271IPWG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS1271IPWG4 is usually 5 days.
3.What payment methods are accepted for ADS1271IPWG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS1271IPWG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS1271IPWG4?
ADS1271IPWG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS1271IPWG4 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 ADS1271IPWG4?
For technical support, including ADS1271IPWG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS1271IPWG4 requirements.
6.How does Aetrix verify that ADS1271IPWG4 is sourced from the original manufacturer or authorized distributors?
All ADS1271IPWG4 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 ADS1271IPWG4 meets industry standards.
7.What is the process for return or replacement of ADS1271IPWG4?
All ADS1271IPWG4 units undergo pre-shipment inspection (PSI). If there is an issue with ADS1271IPWG4, 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 ADS1271IPWG4 part is unused and in its original packaging.
Return procedure for ADS1271IPWG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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