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Texas Instruments ADS1260BIRHBR
- Part No.:
- ADS1260BIRHBR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
ADS1260BIRHBR.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,435
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Product details
Overview
ADS1260BIRHBR from Texas Instruments is a 24-bit precision delta-sigma ADC with integrated PGA (gain 1–128), internal 2.5-V reference (2 ppm/°C drift), simultaneous 50/60-Hz rejection, and sensor excitation current sources. It supports five single-ended or three differential inputs and operates from –40°C to +125°C in industrial PLC analog input modules and weigh-scale systems.
For engineers reviewing the ADS1260BIRHBR datasheet, ADS1260BIRHBR pinout, ADS1260BIRHBR application, or ADS1260BIRHBR equivalent, key selection considerations include its 30 nVRMS noise at 20 SPS (gain = 128), 1 nV/°C offset drift, 5-mm × 5-mm VQFN-32 package, CRC-8-ATM data integrity, and support for RTD and bridge sensor measurement without external excitation circuitry.
Technical Context
The ADS1260BIRHBR implements a chopper-stabilized delta-sigma modulator with programmable digital filtering enabling single-cycle settling and line-frequency rejection. Its PGA features 1 GΩ input impedance and low input bias current (6 nA typical), minimizing sensor loading error in high-impedance applications like strain gauges and thermistors.
Integrated diagnostics include signal monitor, reference monitor, supply monitor, temperature sensor, and burn-out current sources - all operating concurrently with conversion. The device uses an internal oscillator (7.3728 MHz) or external clock and communicates via SPI-compatible serial interface with DOUT/DRDY dual-function pin and CRC verification on data reads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit with no missing codes - guarantees monotonicity and full-scale accuracy for high-fidelity sensor digitization. |
| Data Rate | 2.5 SPS to 40 kSPS - enables flexible trade-off between noise performance (30 nVRMS at 20 SPS) and throughput. |
| PGA Gain Range | 1 to 128 - supports direct connection of mV-level sensors (±7 mV min) to ±5 V full-scale range without external amplification. |
| Reference Drift | 2 ppm/°C (max over 0°C to 85°C) - ensures stable scaling across temperature in precision weighing and process control. |
| Offset Drift | 1 nV/°C - maintains baseline stability in long-duration measurements such as lab instrumentation and environmental monitoring. |
| INL Error | ±2 ppm FSR (gain ≤16) - delivers sub-ppm linearity critical for calibration-grade metrology and analytical instrumentation. |
| Excitation Currents | 50 µA to 3 mA (8 settings) - enables direct 2-/3-/4-wire RTD measurement and bridge sensor biasing without discrete current sources. |
Pinout & Package
VQFN-32 (RHB), 5.0 mm × 5.0 mm, exposed thermal pad soldered to AVSS for thermal and mechanical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0–AIN4, AINCOM | Analog input channels | Supports 5 single-ended or 3 differential inputs; AINCOM serves as common-mode reference and IDAC return path. |
| CAPP / CAPN | PGA output terminals | Differential outputs for external filtering; require 4.7-nF C0G capacitor for stability per datasheet layout guidance. |
| REFOUT | Internal reference output | 2.5-V precision voltage source; requires 10-µF bypass to AVSS for low-noise operation. |
| DOUT/DRDY | Serial data output / data ready indicator | Active-low DRDY flag and SPI data output share one pin - simplifies PCB routing but requires careful timing coordination. |
| START / CS / SCLK / DIN | Conversion control & SPI interface | Asynchronous START initiates conversion; SPI uses standard 4-wire protocol with chip select and clock synchronization. |
| PWDN / RESET | Power management & initialization | PWDN reduces current to 2–8 µA; RESET provides hardware reset with 4-cycle minimum pulse width. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous 50/60-Hz rejection | Eliminates need for external notch filters in AC-line-noise environments like factory-floor PLCs and power analyzers. |
| Single-cycle settling mode | Enables deterministic latency of exactly one data rate period - essential for closed-loop control and synchronized multi-channel sampling. |
| Integrated burn-out detection | 0.05–10 µA programmable current sources identify open-circuit sensors before conversion, preventing erroneous readings in safety-critical systems. |
| CRC-8-ATM data verification | Ensures integrity of readback register values and conversion results - critical for functional safety compliance (IEC 61508 SIL-2). |
| Signal & reference monitors | Real-time validation of PGA output, REFOUT voltage, and supply rails during conversion - detects fault conditions without halting measurement flow. |
Applications
| PLC Analog Input Modules | Weigh Scales and Strain-Gauge Digitizers |
|---|---|
Use Scenario: High-density modular I/O cards acquiring signals from multiple 4–20 mA transmitters, thermocouples, and RTDs in industrial automation cabinets. IC Role / Device Role / Timing Role: Primary ADC with integrated PGA, reference, and diagnostics - performs simultaneous channel scanning and line-frequency rejection per sample. Use Value: Reduces BOM count by eliminating external op-amps, references, and anti-alias filters while maintaining <1 ppm total unadjusted error over temperature. | Use Scenario: Platform scales measuring loads from grams to tons using load cells with mV/V sensitivity and high common-mode noise. IC Role / Device Role / Timing Role: Precision front-end digitizer with 1 GΩ PGA inputs and programmable excitation - directly interfaces Wheatstone bridges without signal conditioning. Use Value: Achieves 30 nVRMS noise floor and 1 nV/°C offset drift, enabling 1:1,000,000 resolution in legal-for-trade weighing applications. |
| Temperature & Pressure Measurement | Lab Instrumentation |
Use Scenario: Portable handheld calibrators and field transmitters measuring RTDs (Pt100/Pt1000), thermistors, and pressure transducers in harsh environments. IC Role / Device Role / Timing Role: Sensor-ready ADC with built-in IDACs, burn-out detection, and temperature sensor - handles excitation, fault checking, and digitization in one IC. Use Value: Enables true 4-wire RTD measurement with matched current sources (±0.1% match error), reducing calibration burden and improving long-term stability. | Use Scenario: Benchtop multimeters, data loggers, and spectral analyzers requiring ultra-low drift and repeatable DC accuracy over extended acquisition periods. IC Role / Device Role / Timing Role: High-stability measurement core with chopper-stabilized architecture and internal reference monitoring - suppresses 1/f noise and thermal EMFs. Use Value: Delivers 2 ppm linearity and 0.5 ppm/°C gain drift, supporting NIST-traceable calibration and sub-ppm measurement uncertainty claims. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision delta-sigma ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1261BIRHBR | 10-channel variant (5 diff / 10 SE), adds 4 GPIOs and AC excitation outputs; identical reference, PGA, and noise specs. | Required for multi-sensor systems needing >5 inputs or AC-driven bridge sensors (e.g., dynamic strain measurement). | Select ADS1261BIRHBR only when additional analog inputs or ACX capability are needed - not pin-compatible due to different AINx/IDAC/GPIO mapping. |
| AD7177-2BRUZ | 32-bit ADC, lower noise (15 nVRMS), no integrated IDACs or burn-out detection; requires external reference and excitation circuitry. | Suitable for ultra-high-resolution applications where external component count is acceptable and diagnostics are handled at system level. | Choose AD7177-2BRUZ when absolute lowest noise dominates requirements and system design accommodates external support components. |
Compared with ADS1261BIRHBR, the ADS1260BIRHBR trades channel count and GPIOs for smaller footprint and lower cost in fixed-input-count systems; versus AD7177-2BRUZ, it offers higher integration and built-in sensor interfaces at the expense of ultimate resolution - making it optimal for embedded industrial sensor nodes.
Availability
ADS1260BIRHBR is available at Aetrix Electronics and suitable for PLC analog input modules, weigh-scale electronics, and temperature/pressure transmitters requiring stable component supply across extended product lifecycles and industrial temperature ranges.
Supply support for ADS1260BIRHBR 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 acquisition and industrial signal chain solutions.
The ADS126x family was designed specifically for high-accuracy, sensor-integrated measurement in harsh industrial environments - combining metrology-grade performance with on-chip diagnostics and robust packaging for reliability from –40°C to +125°C.
FAQ
What is the maximum data rate supported by the ADS1260BIRHBR?
The ADS1260BIRHBR supports a maximum data rate of 40 kSPS. At this rate, integral nonlinearity remains within ±5 ppm FSR for gains up to 32, and noise increases to approximately 120 nVRMS. For optimal noise performance, 20 SPS is recommended - delivering 30 nVRMS at gain = 128. The device maintains single-cycle settling and simultaneous 50/60-Hz rejection across its entire data rate range.
Does the ADS1260BIRHBR include an internal voltage reference?
Yes, the ADS1260BIRHBR integrates a precision 2.5-V bandgap reference with initial error of ±0.1% (B-grade), temperature drift of 2 ppm/°C (0°C to 85°C), and long-term drift of ±25 ppm over 1000 hours. This reference powers the ADC core and is available at the REFOUT pin for external use, requiring a 10-µF capacitor to AVSS for stability.
How many analog input channels does the ADS1260BIRHBR support?
The ADS1260BIRHBR supports five single-ended inputs (AIN0–AIN4) or three differential input pairs (AIN0–AINCOM, AIN1–AINCOM, AIN2–AINCOM). Unlike the ADS1261BIRHBR, it does not support GPIOs or AC excitation outputs, and pins AIN5–AIN9 are NC (no connect) in this variant.
What diagnostic functions are integrated into the ADS1260BIRHBR?
The ADS1260BIRHBR integrates signal monitor (PGA output), reference monitor (REFOUT), supply monitor (AVDD/AVSS/DVDD), internal temperature sensor (122.4 mV at 25°C, 420 µV/°C), and burn-out current sources (0.05–10 µA). These operate concurrently with conversions and report status via dedicated registers - enabling real-time fault detection without interrupting measurement flow.
Is the ADS1260BIRHBR pin-compatible with other devices in the ADS126x family?
No, the ADS1260BIRHBR is not pin-compatible with the ADS1261BIRHBR despite sharing the same VQFN-32 (RHB) package. Pin functions differ significantly: AIN5–AIN9 are NC on ADS1260BIRHBR but serve as analog inputs/GPIOs/ACX outputs on ADS1261BIRHBR, and the latter includes additional IDAC and excitation routing. PCB layout must be specific to each part number.
ADS1260BIRHBR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 24
- Sampling Rate (Per Second):
- 40k
- Number of Inputs:
- 5
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-PGA-ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 4.75V ~ 5.25V
- Voltage - Supply, Digital:
- 2.7V ~ 5.25V
- Features:
- PGA
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 32-VQFN (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS1260BIRHBR FAQ
1.How can I place an order for ADS1260BIRHBR through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS1260BIRHBR 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 ADS1260BIRHBR reliable?
The price and inventory of ADS1260BIRHBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS1260BIRHBR is usually 5 days.
3.What payment methods are accepted for ADS1260BIRHBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS1260BIRHBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS1260BIRHBR?
ADS1260BIRHBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS1260BIRHBR 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 ADS1260BIRHBR?
For technical support, including ADS1260BIRHBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS1260BIRHBR requirements.
6.How does Aetrix verify that ADS1260BIRHBR is sourced from the original manufacturer or authorized distributors?
All ADS1260BIRHBR 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 ADS1260BIRHBR meets industry standards.
7.What is the process for return or replacement of ADS1260BIRHBR?
All ADS1260BIRHBR units undergo pre-shipment inspection (PSI). If there is an issue with ADS1260BIRHBR, 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 ADS1260BIRHBR part is unused and in its original packaging.
Return procedure for ADS1260BIRHBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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