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

ADS1262

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Product details

Parameters

Resolution (Bits) 32 Number of input channels 10 Sample rate (Max) (kSPS) 38 Interface 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 Approx. price (US$) 7.83 | 1ku open-in-new Find other Precision ADCs (<=10MSPS)

Package | Pins | Size

TSSOP (PW) 28 62 mm² 9.7 x 6.4 open-in-new Find other Precision ADCs (<=10MSPS)

Features

  • 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 Input/Outputs
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Description

The ADS1262 and ADS1263 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
* Datasheet ADS126x 32-Bit, Precision, 38-kSPS, Analog-to-Digital Converter (ADC) with Programmable Gain Amplifier (PGA) and Voltage Reference datasheet (Rev. B) Jul. 08, 2015
Application notes ADS124S08 3-Wire PT100 RTD Measurement Circuit w/ Low-Side Reference and 1 IDAC (Rev. A) Mar. 09, 2020
Application notes K-type thermocouple measurement circuit with precision ADC Mar. 19, 2019
Application notes A Basic Guide to Thermocouple Measurements Sep. 28, 2018
Application notes A Basic Guide to RTD Measurements Jun. 19, 2018
Application notes Digital Filter Types in Delta-Sigma ADCs Jun. 27, 2017
More literature Blog: Understanding input range requirements for Precision ADCs with integrated PGAs Apr. 26, 2017
Selection guides TI Components for Aerospace and Defense Guide (Rev. E) Mar. 22, 2017
Application notes How delta-sigma ADCs work, Part 1 (Rev. A) Sep. 19, 2016
More literature Blog: And then there was noise: The mystery of the missing ENOB (Part 3) Jul. 21, 2016
More literature Blog: And then there was noise: The mystery of the missing ENOB (Part 2) Jul. 21, 2016
More literature Blog: And then there was noise: The mystery of the missing ENOB Jul. 21, 2016
User guides ADS126xEVM User's Guide (Rev. A) Dec. 09, 2015
Technical articles And then there was noise: The mystery of the missing ENOB Oct. 30, 2015
Technical articles The delta-sigma advantage to anti-aliasing filters Oct. 02, 2015
Technical articles Aliasing in ADCs: Not all signals are what they appear to be Sep. 04, 2015
Technical articles Understanding input range requirements for Precision ADCs with integrated PGAs Jul. 21, 2015
White papers Integrated diagnostics apply system reliability features at the ADC device level May 26, 2015
More literature Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs Mar. 19, 2015
Application notes How delta-sigma ADCs work, Part 2 Nov. 09, 2011
Application notes Delta-Sigma ADC Design for Bridge Sensor Applications Sep. 30, 2011

Design & development

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

Hardware development

EVALUATION BOARDS Download
Description

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 transformer-coupled (...)

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EVALUATION BOARDS Download
document-generic User guide
Description

The ADS1262EVM performance demonstration kit (PDK) is a platform for evaluation of the ADS1262 analog-to-digital converter (ADC). The ADS1262 is a low-noise, low-drift, 32-bit delta-sigma ADC for precision industrial applications with data rates up to 38.4kSPS. The ADS1262EVM-PDK includes the (...)

Features
  • Includes all required support circuitry for the ADS1262
  • ADCProTM evaluation software for Microsoft Windows (XP & 7)TM with built-in analysis tools
  • Configurable inputs, references, supplies, and clock sources
  • Easily accesible signals via testpoints and headers
View details
EVALUATION BOARDS Download
Description

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 code (...)

Features
  • Complete register map
  • PGA input range calculator
  • SINC1/2/3/4 filter response for ADC1
  • SIN3 filter response for ADC2
  • Raw code converter
  • CRC & Checksum calculator
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Design tools & simulation

SIMULATION MODELS Download
SBAM246.ZIP (90 KB) - IBIS Model
SIMULATION TOOLS Download
SPICE-based analog simulation program
TINA-TI — 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 (...)
document-generic User guide
CALCULATION TOOLS Download
Analog engineer's calculator
ANALOG-ENGINEER-CALC — 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 op-amp gain with feedback (...)
Features
  • Expedites circuit design with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
    • Noise calculations
    • Common unit translation
  • Solves common amplifier circuit design problems
    • Gain selections using standard resistors
    • Filter configurations
    • Total noise for common amplifier configurations
  • (...)
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Reference designs

REFERENCE DESIGNS Download
High-Resolution, Low-Drift, Precision Weigh-Scale Reference Design with AC Bridge Excitation
TIPD188 — 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.
document-generic Schematic document-generic User guide
Design files
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REFERENCE DESIGNS Download
Dual Channel-to-Channel Isolated Universal Analog Input Module for PLC Reference Design
TIDA-00550 — The TIDA-00550, dual channel-to-channel isolated universal analog input module reference design for programmable logic controllers (PLC), combines precision and flexibility. This TI Design used in conjunction with sensor transmitters can measure standard input voltages and currents as well as (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Analog Input Module for Industrial Outputs and Temperature Sensors Reference Design
TIPD164 — This TI Designs, Precision Verified design implements an analog input module for industrial voltages, currents, and temperature sensors.  For industrial outputs, the possible input ranges include: 4-20 mA, 0-20 mA, +/-25 mA, 0-5 V, 0-10 V, +/-5 V, +/-10 V. The design includes conditioning (...)
document-generic Schematic document-generic User guide
Design files
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CAD/CAE symbols

Package Pins Download
TSSOP (PW) 28 View options

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Training series

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Videos

Redefining High Resolution and Low Noise in Delta-Sigma ADC Applications

Explore TI’s unique Delta-Sigma ADC architecture helps redefine what “high resolution” and “low noise” means for designers with real-world examples and designs.

Posted: 06-Jan-2015
Duration: 56:25

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