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Texas Instruments ADS1271IBPW
- Part No.:
- ADS1271IBPW
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADS1271IBPW.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:840
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Product details
Overview
ADS1271IBPW 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 ±0.0006%FSR INL and 1.8µV/°C offset drift. It operates across −40°C to +105°C and supports daisy-chainable SPI or Frame-Sync serial interface for multichannel vibration analysis systems.
For engineers reviewing the ADS1271IBPW datasheet, ADS1271IBPW pinout, ADS1271IBPW application, or ADS1271IBPW equivalent, this page provides verified technical context, operating-mode–specific specifications, TSSOP-16 pin functions, real-world use-value applications, and two validated alternative parts with documented functional trade-offs.
Technical Context
The ADS1271IBPW integrates a 6th-order chopper-stabilized delta-sigma modulator and a linear-phase FIR decimation filter, enabling simultaneous high DC accuracy and wide AC bandwidth (up to 51kHz). Its modulator output is accessible externally for custom digital filtering.
Pin-driven configuration eliminates register programming: MODE selects High-Speed/High-Resolution/Low-Power modes; FORMAT chooses SPI/Frame-Sync/modulator output; SYNC/PDWN enables synchronization or power-down. DRDY/FSYNC serves dual role as data-ready flag or frame-sync input depending on FORMAT setting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit, no missing codes - ensures full dynamic range utilization without code gaps in precision measurement. |
| Data Rate (High-Speed) | 105.469kSPS - supports real-time sampling of fast transients in modal analysis up to 47.8kHz usable bandwidth. |
| SNR (High-Resolution) | 109dB - enables detection of sub-microvolt signals in low-noise acoustics and strain gauge applications. |
| Offset Drift | 1.8µV/°C - maintains calibration stability over extended industrial temperature range without frequent recalibration. |
| Power Dissipation (Low-Power) | 35mW - reduces thermal load and enables compact multi-ADC designs in space-constrained test equipment. |
| Passband Ripple | ±0.005dB - preserves amplitude fidelity across 90% of Nyquist bandwidth, critical for accurate frequency-domain analysis. |
| Operating Temp Range | −40°C to +105°C - qualified for deployment in harsh environments including engine bay sensors and industrial motor drives. |
Pinout & Package
TSSOP-16 (PW) package: 5mm × 4.4mm body, 0.65mm pitch, thermally enhanced for stable performance in high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AINP / AINN | Differential Analog Input | Accepts ±VREF differential signal; input impedance varies by mode (16.4kΩ/32.8kΩ) - requires matched drive circuitry. |
| VREFP / VREFN | Differential Reference Input | Defines full-scale range (2×VREF); reference impedance is 4.2kΩ (HS/HR) or 8.4kΩ (LP) - demands low-noise, high-current reference buffer. |
| MODE | Mode Selection Input | Logic level sets operation: 0 = High-Speed, float = High-Resolution, 1 = Low-Power - no external pull required. |
| FORMAT | Interface Configuration | 0 = SPI, 1 = Frame-Sync, float = modulator output (ADS1271B only) - determines DRDY/FSYNC function and SCLK timing. |
| SYNC/PDWN | Synchronization & Power Control | Active-low input for system-wide ADC sync or power-down entry - enables deterministic latency across multiple devices. |
| DOUT / DIN | Daisy-Chain Data I/O | Allows cascading of multiple ADS1271IBPW units on single serial bus - reduces GPIO count in multichannel DAQ systems. |
| DRDY/FSYNC | Mode-Dependent Control Signal | Output in SPI mode (data ready), input in Frame-Sync mode (frame start trigger) - simplifies interface logic selection. |
| SCLK | Serial Clock Input | Timing source for data retrieval; rate scales with fDATA (64× or 128×) - must be jitter-controlled for SNR preservation. |
Key Features
| Feature | Design Value |
|---|---|
| Three Configurable Operating Modes | Hardware-selectable High-Speed (105kSPS), High-Resolution (109dB SNR), and Low-Power (35mW) - eliminates firmware overhead for mode switching. |
| Pin-Driven Control Architecture | No internal registers or SPI writes needed - reduces initialization complexity and eliminates configuration error risk in safety-critical systems. |
| Daisy-Chainable Serial Interface | Single DOUT→DIN connection enables scalable multichannel acquisition without additional CS lines or FPGA resources. |
| Modulator Output Access | Raw bitstream available via FORMAT=1 (ADS1271B) or FORMAT=float - supports custom decimation or real-time spectral analysis. |
| Linear-Phase Digital Filter | Preserves time-domain waveform integrity with <0.005dB passband ripple - essential for phase-sensitive applications like structural health monitoring. |
Applications
| Vibration/Modal Analysis | Acoustics Measurement |
|---|---|
Use Scenario: Capturing high-fidelity acceleration waveforms from MEMS or piezoelectric sensors on rotating machinery. IC Role / Device Role / Timing Role: Primary ADC digitizing differential sensor outputs with synchronized sampling across multiple axes. Use Value: 105kSPS rate resolves harmonics up to 47.8kHz; 109dB SNR detects micro-strain events buried in mechanical noise floor. | Use Scenario: Recording airborne sound pressure levels in anechoic chambers or field noise mapping. IC Role / Device Role / Timing Role: High-linearity ADC front-end for electret or MEMS microphone preamplifier chains. Use Value: ±0.0006%FSR INL prevents harmonic distortion artifacts; −108dB THD ensures clean spectral representation of tonal content. |
| Dynamic Strain Gauges | Pressure Sensor Signal Conditioning |
Use Scenario: Monitoring bridge deflection or turbine blade stress under cyclic loading using Wheatstone bridge configurations. IC Role / Device Role / Timing Role: Precision ratiometric ADC measuring mV-level bridge imbalances with reference tracking. Use Value: 1.8µV/°C offset drift minimizes thermal zero-shift; 2ppm/°C gain drift maintains calibration over ambient swings. | Use Scenario: Digitizing output from piezoresistive or capacitive pressure transducers in HVAC or medical gas delivery systems. IC Role / Device Role / Timing Role: Isolated signal chain ADC interfacing with instrumentation amplifiers and voltage references. Use Value: 51kHz bandwidth captures rapid pressure transients; 90dB CMRR rejects common-mode noise from shared power rails. |
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 |
|---|---|---|---|
| ADS1278IPAP | Octal-channel, 24-bit, 105kSPS per channel; TQFP-64; higher power (125mW); same modulator architecture and pin-compatible serial interface. | Designed for fully integrated multichannel systems requiring synchronized sampling across 8 inputs without external multiplexing. | Select when channel count >1 is required and board area allows larger package; not drop-in due to different pin count and layout. |
| AD7768-1BCPZ | Single-channel, 24-bit, 256kSPS; LFCSP-32; 112dB SNR; integrated reference; SPI-only interface; no MODE/FORAMT pin control. | Targets ultra-high-speed, ultra-low-noise applications where programmable registers and higher data throughput justify added firmware complexity. | Select when maximum SNR (112dB) and speed (256kSPS) outweigh need for pin-strapped simplicity and extended temperature range. |
Compared with ADS1278IPAP, ADS1271IBPW offers lower power and smaller footprint for single-channel deployments; compared with AD7768-1BCPZ, it trades 7dB SNR and 2.4× speed for zero-register configuration and guaranteed −40°C to +105°C operation without derating.
Availability
ADS1271IBPW is available at Aetrix Electronics and suitable for vibration analysis, acoustic sensing, dynamic strain monitoring, and high-reliability pressure transduction requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADS1271IBPW 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 conversion and industrial-grade IC design.
The ADS1271IBPW belongs to TI's high-accuracy delta-sigma ADC product line, engineered specifically for industrial test and measurement systems demanding simultaneous high DC stability and wide AC bandwidth.
FAQ
What are the three operating modes of the ADS1271IBPW and how do they differ in performance?
The ADS1271IBPW supports High-Speed (105.469kSPS, 106dB SNR), High-Resolution (52.734kSPS, 109dB SNR), and Low-Power (52.734kSPS, 35mW) modes. Each is selected via the MODE pin and trades off speed, resolution, or power consumption. All modes maintain ±0.0006%FSR INL and operate across −40°C to +105°C. The ADS1271IBPW achieves this flexibility without register writes-only hardware pin states determine behavior.
Does the ADS1271IBPW require external configuration registers or firmware initialization?
No, the ADS1271IBPW uses pin-driven control: MODE, FORMAT, and SYNC/PDWN pins directly configure operation mode, serial interface type, and synchronization/power-down state. There are no internal registers to program, eliminating firmware dependencies and reducing startup time. This architecture makes the ADS1271IBPW ideal for safety-critical or resource-constrained systems where deterministic behavior is mandatory.
What is the purpose of the modulator output option on the ADS1271IBPW?
The modulator output option (enabled by floating the FORMAT pin) provides access to the raw 1-bit delta-sigma bitstream before FIR decimation. This allows external digital filtering for custom response shaping or real-time spectral analysis. While the ADS1271IBPW datasheet confirms this capability, note that modulator output functionality is explicitly documented for the ADS1271B variant; ADS1271IBPW supports it per TI's family documentation and pin-function table.
How does the ADS1271IBPW handle multichannel synchronization in daisy-chain configurations?
The ADS1271IBPW supports precise multichannel synchronization via its SYNC/PDWN pin: asserting this active-low input simultaneously across multiple devices resets their internal modulator clocks and initiates aligned conversions. Combined with daisy-chained DOUT→DIN serial data routing, this enables deterministic inter-channel phase alignment-critical for beamforming, modal analysis, and time-of-flight measurements. The ADS1271IBPW guarantees sub-sample jitter between synchronized units.
What are the absolute maximum ratings for analog and digital supplies on the ADS1271IBPW?
The ADS1271IBPW specifies AVDD = −0.3V to +6.0V and DVDD = −0.3V to +3.6V as absolute maximum supply ratings. Recommended operating ranges are AVDD = 4.75V to 5.25V and DVDD = 1.65V to 3.6V. Exceeding these limits-even momentarily-may cause permanent damage. The device also requires AGND–DGND separation ≤ ±0.3V to prevent ground-loop errors, and analog input voltage must remain within AGND–0.1V to AVDD+0.1V to avoid ESD diode conduction.
ADS1271IBPW 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:
- 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:
- -
ADS1271IBPW FAQ
1.How can I place an order for ADS1271IBPW through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS1271IBPW 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 ADS1271IBPW reliable?
The price and inventory of ADS1271IBPW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS1271IBPW is usually 5 days.
3.What payment methods are accepted for ADS1271IBPW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS1271IBPW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS1271IBPW?
ADS1271IBPW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS1271IBPW 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 ADS1271IBPW?
For technical support, including ADS1271IBPW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS1271IBPW requirements.
6.How does Aetrix verify that ADS1271IBPW is sourced from the original manufacturer or authorized distributors?
All ADS1271IBPW 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 ADS1271IBPW meets industry standards.
7.What is the process for return or replacement of ADS1271IBPW?
All ADS1271IBPW units undergo pre-shipment inspection (PSI). If there is an issue with ADS1271IBPW, 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 ADS1271IBPW part is unused and in its original packaging.
Return procedure for ADS1271IBPW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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