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ADS1262

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32-bit 38-kSPS 10-ch delta-sigma ADC with PGA and voltage reference for factory automation

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Data sheet

ADS1262

ACTIVE
Data sheet Order now

Product details

Resolution (Bits) 32 Number of input channels 10 Sample rate (Max) (kSPS) 38 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-Ended Multi-channel configuration Multiplexed Rating Catalog Reference mode Ext, Int Input range (Max) (V) 2.5, 5 Input range (Min) (V) -2.5, 0 Features 50/60 Hz Rejection, Excitation Current Sources (iDACs), GPIO, Oscillator, PGA, Temp Sensor Operating temperature range (C) -40 to 125 Power consumption (Typ) (mW) 27 Analog voltage AVDD (Min) (V) 4.75 Analog voltage AVDD (Max) (V) 5.25 Digital supply (Min) (V) 2.7 Digital supply (Max) (V) 5.25
Resolution (Bits) 32 Number of input channels 10 Sample rate (Max) (kSPS) 38 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-Ended Multi-channel configuration Multiplexed Rating Catalog Reference mode Ext, Int Input range (Max) (V) 2.5, 5 Input range (Min) (V) -2.5, 0 Features 50/60 Hz Rejection, Excitation Current Sources (iDACs), GPIO, Oscillator, PGA, Temp Sensor Operating temperature range (C) -40 to 125 Power consumption (Typ) (mW) 27 Analog voltage AVDD (Min) (V) 4.75 Analog voltage AVDD (Max) (V) 5.25 Digital supply (Min) (V) 2.7 Digital supply (Max) (V) 5.25
TSSOP (PW) 28 62 mm² 9.7 x 6.4
  • Precision, 32-bit, ΔΣ ADC
  • Auxiliary 24-bit, ΔΣ ADC (ADS1263)
  • Data rates: 2.5 SPS to 38400 SPS
  • Differential input, CMOS PGA
  • 11 multifunction analog inputs
  • High-accuracy architecture:
    • Offset drift: 1 nV/°C
    • Gain drift: 0.5 ppm/°C
    • Noise: 7 nVRMS (2.5 SPS, gain = 32)
    • Linearity: 3 ppm
  • 2.5-V internal voltage reference:
    • Temperature drift: 2 ppm/°C
  • 50-Hz and 60-Hz rejection
  • Single-cycle settled conversions
  • Dual sensor excitation current sources
  • Internal fault monitors
  • Internal ADC test signal
  • 8 general-purpose inputs/outputs
  • Precision, 32-bit, ΔΣ ADC
  • Auxiliary 24-bit, ΔΣ ADC (ADS1263)
  • Data rates: 2.5 SPS to 38400 SPS
  • Differential input, CMOS PGA
  • 11 multifunction analog inputs
  • High-accuracy architecture:
    • Offset drift: 1 nV/°C
    • Gain drift: 0.5 ppm/°C
    • Noise: 7 nVRMS (2.5 SPS, gain = 32)
    • Linearity: 3 ppm
  • 2.5-V internal voltage reference:
    • Temperature drift: 2 ppm/°C
  • 50-Hz and 60-Hz rejection
  • Single-cycle settled conversions
  • Dual sensor excitation current sources
  • Internal fault monitors
  • Internal ADC test signal
  • 8 general-purpose inputs/outputs

The ADS1262 and ADS1263 (ADS126x) are low-noise, low-drift, 38.4-kSPS, delta-sigma (ΔΣ) ADCs with an integrated PGA, reference, and internal fault monitors. The ADS1263 integrates an auxiliary, 24-bit, ΔΣ ADC intended for background measurements. The sensor-ready ADCs provide complete, high-accuracy, one-chip measurement solutions for the most-demanding sensor applications, including weigh scales, strain-gauge sensors, thermocouples, and resistance temperature devices (RTD).

The ADCs are comprised of a low-noise, CMOS PGA (gains 1 to 32), a ΔΣ modulator, followed by a programmable digital filter. The flexible analog front-end (AFE) incorporates two sensor-excitation current sources suitable for direct RTD measurement.

A single-cycle settling digital filter maximizes multiple-input conversion throughput, while providing 130-dB rejection of 50-Hz and 60-Hz line cycle interference.

The ADS1262 and ADS1263 are pin and functional compatible. These devices are available in a 28-pin TSSOP package and are fully specified over the –40°C to +125°C temperature range.

The ADS1262 and ADS1263 (ADS126x) are low-noise, low-drift, 38.4-kSPS, delta-sigma (ΔΣ) ADCs with an integrated PGA, reference, and internal fault monitors. The ADS1263 integrates an auxiliary, 24-bit, ΔΣ ADC intended for background measurements. The sensor-ready ADCs provide complete, high-accuracy, one-chip measurement solutions for the most-demanding sensor applications, including weigh scales, strain-gauge sensors, thermocouples, and resistance temperature devices (RTD).

The ADCs are comprised of a low-noise, CMOS PGA (gains 1 to 32), a ΔΣ modulator, followed by a programmable digital filter. The flexible analog front-end (AFE) incorporates two sensor-excitation current sources suitable for direct RTD measurement.

A single-cycle settling digital filter maximizes multiple-input conversion throughput, while providing 130-dB rejection of 50-Hz and 60-Hz line cycle interference.

The ADS1262 and ADS1263 are pin and functional compatible. These devices are available in a 28-pin TSSOP package and are fully specified over the –40°C to +125°C temperature range.
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Technical documentation

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Type Title Date
* Data sheet ADS126x 32-Bit, Precision, 38-kSPS, Analog-to-Digital Converter (ADC) with Programmable Gain Amplifier (PGA) and Voltage Reference datasheet (Rev. C) PDF | HTML 25 May 2021
Application note Calculating Conversion Latency and System Cycle Time for Delta-Sigma ADCs PDF | HTML 23 Mar 2022
Application note A Basic Guide to Bridge Measurements PDF | HTML 18 Feb 2022
Application note ADS124S08 3-Wire PT100 RTD Measurement Circuit w/ Low-Side Reference and 1 IDAC (Rev. B) 09 Sep 2021
Application note Communication Methods for Data Integrity Using Delta-Sigma Data Converters (Rev. A) PDF | HTML 23 Aug 2021
Application note RTD Wire-Break Detection Using Precision Delta-Sigma ADCs PDF | HTML 18 Feb 2021
E-book Fundamentals of Precision ADC Noise Analysis 19 Jun 2020
Circuit design K-type thermocouple measurement circuit with precision ADC 19 Mar 2019
Application note A Basic Guide to Thermocouple Measurements 28 Sep 2018
Application note A Basic Guide to RTD Measurements 19 Jun 2018
Application note Digital Filter Types in Delta-Sigma ADCs PDF | HTML 27 Jun 2017
More literature Blog: Understanding input range requirements for Precision ADCs with integrated PGAs 26 Apr 2017
Analog Design Journal How delta-sigma ADCs work, Part 1 (Rev. A) 19 Sep 2016
More literature Blog: And then there was noise: The mystery of the missing ENOB (Part 3) 21 Jul 2016
More literature Blog: And then there was noise: The mystery of the missing ENOB (Part 2) 21 Jul 2016
More literature Blog: And then there was noise: The mystery of the missing ENOB 21 Jul 2016
EVM User's guide ADS126xEVM User's Guide (Rev. A) 09 Dec 2015
Technical article And then there was noise: The mystery of the missing ENOB 30 Oct 2015
Technical article The delta-sigma advantage to anti-aliasing filters 02 Oct 2015
Technical article Aliasing in ADCs: Not all signals are what they appear to be 04 Sep 2015
Technical article Understanding input range requirements for Precision ADCs with integrated PGAs 21 Jul 2015
White paper Integrated diagnostics apply system reliability features at the ADC device level 26 May 2015
E-book Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs 19 Mar 2015
Analog Design Journal How delta-sigma ADCs work, Part 2 09 Nov 2011
Application note Delta-Sigma ADC Design for Bridge Sensor Applications 30 Sep 2011

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Simulation model

ADS1262 IBIS Model

SBAM246.ZIP (90 KB) - IBIS Model
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Calculation tool

ADC-INPUT-CALC — Analog-to-digital converter (ADC) input driver design tool supporting multiple input types

ADC-INPUT-CALC is an online tool that provides support for designing the input buffer to an analog-to-digital converter (ADC). It offers 24 different op-amp based buffer circuits that can be used to drive an ADC input. The available topologies cover differential, single-ended and (...)
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Calculation tool

ADS126X-CALC-TOOL — ADS1262 and ADS1263 Excel™ calculator tool

The ADS1262-ADS1263 Excel calculator provides the user with several easy-to-use tools to help simplify the configuration of the ADS1262 and ADS1263. This calculator also provides valuable information to help the user understand frequency and settling time requirements as well as validate output (...)
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Calculation tool

ANALOG-ENGINEER-CALC — Analog engineer's calculator

The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)
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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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Simulation tool

TINA-TI — SPICE-based analog simulation program

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
User guide: PDF
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Reference designs

TIPD188 — High-Resolution, Low-Drift, Precision Weigh-Scale Reference Design with AC Bridge Excitation

This precision weigh-scale reference design achieves greater than 50,000 noise-free counts of resolution. Offset and offset drift errors are nearly eliminated by ac bridge excitation. This design takes advantage of the high-resolution ADS1262 delta-sigma ADC.
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00550 — Dual Channel-to-Channel Isolated Universal Analog Input Module for PLC Reference Design

TIDA-00550, a dual channel-to-channel isolated universal analog input module reference design for programmable logic controllers (PLCs), combines precision and flexibility. This reference design, used in conjunction with sensor transmitters, can measure standard input voltages and currents as (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIPD164 — Analog Input Module for Industrial Outputs and Temperature Sensors Reference Design

This reference design that is precision verified implements an analog input module for industrial voltages, currents and temperature sensors.  For industrial outputs, the possible input ranges include: 4 to 20 mA, 0 to 20 mA, +/-25 mA, 0 to 5 V, 0 to 10 V, +/-5 V and +/-10 V. The design (...)
User guide: PDF
Schematic: PDF
Package Pins Download
TSSOP (PW) 28 View options

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