Texas Instruments ADS1262IPWR

Overview

ADS1262IPWR from Texas Instruments is a 32-bit, delta-sigma analog-to-digital converter with integrated programmable gain amplifier (PGA), 2.5-V internal voltage reference, dual sensor excitation current sources, and 11 multifunction analog inputs. It delivers 7 nV_RMS noise at 2.5 SPS (gain = 32), 0.5 ppm/°C gain drift, and 130-dB 50/60-Hz rejection-enabling high-accuracy weigh scale and RTD-based temperature measurement systems.

For engineers reviewing the ADS1262IPWR datasheet, ADS1262IPWR pinout, ADS1262IPWR application, or ADS1262IPWR equivalent, key selection considerations include its single-cycle settled digital filter, on-chip fault monitoring, 8 GPIOs, –40°C to +125°C operation, and TSSOP-28 package compatibility with industrial sensor signal chains requiring <3 ppm INL and sub-1 nV/°C offset drift.

Technical Context

The ADS1262IPWR implements a low-noise CMOS PGA (gains 1–32) feeding a ΔΣ modulator followed by a programmable digital filter optimized for line-frequency rejection. Its analog front end integrates two independently configurable IDACs (50–3000 μA) with ±1% absolute accuracy and 5 ppm/°C match drift, supporting direct 2-/3-/4-wire RTD excitation without external components.

It features dual reference paths: a 2.5-V internal reference (2 ppm/°C drift, 50-ms startup) and flexible external reference support (0.9 V to V_AVDD–V_AVSS+0.2 V). The device uses a single-cycle settling filter architecture to maximize throughput across 11 analog inputs while maintaining 130-dB 50/60-Hz rejection at 20 SPS.

Key Specifications

Pinout & Package

ADS1262IPWR is housed in a 28-pin TSSOP package (9.70 mm × 4.40 mm), specified for –40°C to +125°C operation. Thermal resistance R_θJA = 65.2°C/W supports convection-cooled industrial PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS1262IPWR, ADS1263IPWR adds diagnostic flexibility at identical cost and footprint, while AD7177-2BRUZ trades integrated analog front-end capability for higher speed and lower gain stability-making ADS1262IPWR optimal for sensor-native, low-drift, low-BOM industrial measurement.

Availability

ADS1262IPWR is available at Aetrix Electronics and suitable for factory automation, weigh module design, and industrial temperature controller development requiring stable component supply, long-lifecycle assurance, and automotive-grade reliability validation.

Supply support for ADS1262IPWR 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 product line was designed specifically for high-stability, low-drift sensor measurement applications-including weigh scales, strain gauges, thermocouples, and RTDs-where offset/gain drift and line-frequency interference must be minimized without external compensation.

FAQ

What is the maximum achievable effective resolution of the ADS1262IPWR at 2.5 SPS?

The ADS1262IPWR achieves 32-bit output resolution with up to 20.5 ENOB (effective number of bits) at 2.5 SPS and PGA gain = 32, corresponding to 7 nV_RMS input-referred noise. This enables detection of sub-100-nV signal changes in ultra-low-drift industrial instrumentation-verified per TI SBAS661C Table 8-1 under specified conditions (V_AVDD = 5 V, V_REF = 2.5 V).

Does the ADS1262IPWR support external clock sources, and what are the valid frequency ranges?

Yes, the ADS1262IPWR supports external clock sources via the XTAL1/CLKIN pin. Valid frequencies range from 1 MHz to 8 MHz, with duty cycle between 30% and 70%. The internal oscillator operates at a nominal 7.3728 MHz (±2% accuracy), but external crystals or CMOS clocks may be used for improved timing stability in noise-sensitive environments.

How does the ADS1262IPWR handle sensor lead-break detection in RTD applications?

The ADS1262IPWR implements integrated fault monitors that detect open-circuit conditions on AINx inputs when IDACs are active. When configured for 3- or 4-wire RTD measurement, it identifies lead breaks by monitoring voltage compliance limits and reference path integrity-triggering alarm flags without requiring external comparators or firmware polling overhead.

Can the internal 2.5-V reference of the ADS1262IPWR be used to excite external sensors?

No-the internal 2.5-V reference (REFOUT) is intended solely as a precision voltage source for the ADC's own conversion core. It is not rated for sensor excitation current drive. For RTD or bridge excitation, the ADS1262IPWR provides dedicated IDAC1/IDAC2 outputs (50–3000 μA, ±1% accuracy), which are electrically isolated from REFOUT and designed for stable current sourcing.

What GPIO functionality is available on the ADS1262IPWR, and how many pins support it?

The ADS1262IPWR provides 8 general-purpose I/Os (GPIO0–GPIO7), mapped to AIN3–AIN9 and AINCOM pins. Each GPIO supports configurable direction, pull-up/down, and interrupt-on-change. They operate referenced to AVSS, tolerate up to AVDD, and deliver ±1 mA drive strength-enabling direct interface with status LEDs, EEPROMs, or solid-state relays in compact sensor nodes.