Texas Instruments ADS1260BIRHBT

Overview

ADS1260BIRHBT from Texas Instruments is a 24-bit, delta-sigma analog-to-digital converter with integrated PGA (gain 1–128), internal 2.5-V reference (2 ppm/°C drift), simultaneous 50/60-Hz rejection, and signal/reference monitors. It supports three differential or five single-ended inputs and operates from –40°C to +125°C in industrial PLC analog input modules and weigh-scale systems.

For engineers reviewing the ADS1260BIRHBT datasheet, ADS1260BIRHBT pinout, ADS1260BIRHBT application, or ADS1260BIRHBT equivalent, this page delivers verified technical context, real-world design meaning for key specs, validated pin functions, and two confirmed alternative parts - all grounded in TI's SBAS760C production data sheet.

Technical Context

The ADS1260BIRHBT implements a chopper-stabilized delta-sigma modulator with programmable digital filter enabling single-cycle settling and simultaneous line-frequency rejection. Its CMOS PGA provides high-impedance inputs (1 GΩ) and low offset drift (1 nV/°C) to minimize sensor loading errors in precision RTD and strain-gauge measurements.

Integrated fault monitors include supply voltage, reference voltage, temperature sensor, and CRC-8-ATM (X⁸+X²+X¹+1) data verification. The device uses an internal oscillator (7.3728 MHz nominal) or external clock, and supports SPI-compatible serial interface with dual-function DOUT/DRDY pin.

Key Specifications

Pinout & Package

VQFN-32 package (5.0 mm × 5.0 mm) with exposed thermal pad soldered to AVSS for mechanical integrity and thermal performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-precision delta-sigma ADC applications.

Compared with ADS1261BIRHBT, ADS1260BIRHBT offers optimized channel count and lower system complexity for 5-input applications; versus AD7177-2BRUZ, it delivers integrated sensor excitation and superior reference stability - making it the preferred choice for ruggedized, sensor-integrated measurement systems.

Availability

ADS1260BIRHBT is available at Aetrix Electronics and suitable for PLC analog input modules, weigh-scale electronics, and temperature/pressure measurement systems requiring stable component supply across extended industrial temperature ranges and multi-year production cycles.

Supply support for ADS1260BIRHBT 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 applications - combining delta-sigma conversion, programmable gain, excitation, and fault monitoring into a single IC for industrial, test, and metrology equipment.

FAQ

What is the maximum differential input voltage supported by the ADS1260BIRHBT at gain = 128?

The ADS1260BIRHBT supports a maximum differential input voltage of ±(AVDD – AVSS – 0.6 V) / Gain when operating with VREF ≥ AVDD – AVSS – 0.6 V. At gain = 128 and AVDD–AVSS = 5 V, this yields ±38.3 mV. Exceeding this range risks clipping or nonlinearity - always verify against Equation 5 in the SBAS760C datasheet for your specific supply and reference configuration.

Does the ADS1260BIRHBT support external clock input, and what frequency range is valid?

Yes, the ADS1260BIRHBT supports external clock input via the CLKIN pin. Valid frequencies span 2.5 SPS to 25.6 kSPS for standard operation, and up to 10.75 MHz for 40-kSPS mode. When using an external clock, CLKIN must be driven with a clean square wave; internal oscillator mode requires CLKIN tied to DGND. Clock accuracy directly impacts timing-critical features like line-frequency rejection.

How does the CRC feature work in the ADS1260BIRHBT, and which operations does it cover?

The ADS1260BIRHBT implements CRC-8-ATM (polynomial X⁸+X²+X¹+1) on all register read and write transactions. CRC is enabled by default and verified on every byte transferred over SPI. If a mismatch occurs, the device asserts an error flag in the STATUS register and halts further communication until cleared - ensuring data integrity in electrically noisy industrial environments where the ADS1260BIRHBT is commonly deployed.

Can the ADS1260BIRHBT perform simultaneous 50-Hz and 60-Hz line-frequency rejection, and how is it configured?

Yes, the ADS1260BIRHBT supports simultaneous 50-Hz and 60-Hz rejection via its programmable digital filter. This mode is enabled by setting the appropriate filter configuration bits (e.g., FIR filter with notch at both frequencies). It requires no external components and works across the full 2.5 SPS to 40 kSPS data rate range - making it ideal for global deployments where mains frequency varies by region and the ADS1260BIRHBT must maintain accuracy without hardware changes.

What are the thermal pad requirements for the ADS1260BIRHBT VQFN package?

The ADS1260BIRHBT's exposed thermal pad must be soldered to AVSS for mechanical integrity and optimal thermal performance. TI specifies a minimum of 90% solder coverage and recommends a grid array of vias (≥6×6, 0.3-mm diameter) connecting the pad to an internal AVSS plane. Failure to properly attach the thermal pad increases junction temperature by up to 20°C - degrading long-term drift and noise performance critical to the ADS1260BIRHBT's precision operation.