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Product details

Parameters

Resolution (Bits) 24 Number of input channels 8 Sample rate (Max) (kSPS) 2 Interface SPI Architecture Delta-Sigma Input type Differential, Single-Ended Multi-channel configuration Multiplexed Rating Catalog Reference mode Ext, Int Input range (Max) (V) 2.125, 4.25 Input range (Min) (V) -2.125, 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) 2.3 Analog voltage AVDD (Min) (V) 2.7 Analog voltage AVDD (Max) (V) 5.25 Digital supply (Min) (V) 2.7 Digital supply (Max) (V) 5.25 Approx. price (US$) 4.44 | 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

  • 24 Bits, No Missing Codes
  • Programmable Data Rates Up to 2 kSPS
  • Single-Cycle Settling for All Data Rates
  • Simultaneous 50-Hz and 60-Hz Rejection at 20 SPS
  • Analog Multiplexer With 8 (ADS1248) and 4
    (ADS1247) Independently Selectable Inputs
  • Low-Noise PGA: 48 nVRMS at PGA = 128
  • Dual-Matched Programmable Excitation Current Sources
  • Low-Drift Internal 2.048-V Reference:
    10 ppm/°C (Maximum)
  • Sensor Burn-Out Detection
  • 4 or 8 General-Purpose I/Os (ADS1247, ADS1248)
  • Internal Temperature Sensor
  • Power Supply and VREF Monitoring (ADS1247, ADS1248)
  • Self and System Calibration
  • SPI™-Compatible Serial Interface
  • Analog Supply: Unipolar (2.7 V to 5.25 V) and Bipolar (±2.5 V) Operation
  • Digital Supply: 2.7 V to 5.25 V
  • Operating Temperature –40°C to 125°C
  • APPLICATIONS
    • Temperature Sensor Measurements:
      • RTDs, Thermocouples, and Thermistors
    • Pressure Measurements
    • Flow Meters
    • Factory Automation and Process Controls

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open-in-new Find other Precision ADCs (<=10MSPS)

Description

The ADS1246, ADS1247, and ADS1248 are highly-integrated, precision, 24-bit analog-to-digital converters (ADCs). The devices feature an onboard, low-noise, programmable gain amplifier (PGA), a precision delta-sigma (ΔΣ) ADC with a single-cycle settling digital filter, and an internal oscillator. The ADS1247 and ADS1248 also provide a built-in, very low drift voltage reference with 10-mA output capacity, and two matched programmable current digital-to-analog converters (DACs). The devices provide a complete front-end solution for temperature sensor applications including thermal couples, thermistors, and resistance temperature detectors (RTDs).

An input multiplexer supports four differential inputs for the ADS1248, two for the ADS1247, and one for the ADS1246. In addition, the multiplexer has a sensor burn-out detect, voltage bias for thermocouples, system monitoring, and general-purpose digital I/Os (ADS1247 and ADS1248). The onboard, low-noise PGA provides selectable gains of 1 to 128. The ΔΣ modulator and adjustable digital filter settle in only one cycle, for fast channel cycling when using the input multiplexer, and support data rates up to 2 kSPS. For data rates of 20 SPS or less, both 50-Hz and 60-Hz interference are rejected by the filter.

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ADS124S08 ACTIVE 24-bit, 4-kSPS, 12-ch delta-sigma ADC with PGA and voltage reference for sensor measurement This device has more analog inputs (12), faster sample rate (4kSPS), lower noise & power, smaller package, and better VREF drift, OSC accuracy & IDAC matching

Technical documentation

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Type Title Date
* Datasheet ADS124x 24-Bit, 2-kSPS, Analog-To-Digital Converters With Programmable Gain Amplifier (PGA) For Sensor Measurement datasheet (Rev. H) Mar. 31, 2016
Application notes ADS124S08 3-Wire PT100 RTD Measurement Circuit w/ Low-Side Reference and 1 IDAC (Rev. A) Mar. 09, 2020
Application notes Three-wire PT100 RTD measurement circuit with low-side reference (Rev. B) 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
Technical articles Delta-sigma ADC digital filter types: sinc filters Jun. 10, 2016
Technical articles The impact of voltage reference noise on delta-sigma ADC resolution Dec. 11, 2015
Technical articles Help! My data converter’s giving bad data! What’s wrong? Aug. 07, 2015
Technical articles Understanding input range requirements for Precision ADCs with integrated PGAs Jul. 21, 2015
More literature Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs Mar. 19, 2015
More literature Temperature Sensing Apr. 22, 2013
Application notes RTD Ratiometric Measurements and Filtering Using the ADS1148 and ADS1248 Mar. 13, 2013
User guides ADS1148/ADS1248EVM and ADS1148/ADS1248EVM-PDK User's Guide (Rev. B) May 11, 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 (...)

EVALUATION BOARDS Download
document-generic User guide
Description

ADCPro™ is a modular software system for evaluating analog-to-digital converters (ADCs) without the need for expensive logic analyzers and complex analysis routines. Used alone it is suitable for performing analysis on data sets captured from ADC testing; when paired with a Texas Instruments (...)

Features

ADCPro software from Texas Instruments will simplify the tasks of collecting and analyzing ADC data, and ease evaluation. With it, you can easily set up an evaluation system that may not exactly replicate the manufacturer's system, but still arrive at meaningful results that can be compared to (...)

EVALUATION BOARDS Download
document-generic User guide
Description

The ADS1248EVM-PDK is a complete evaluation/demonstration kit, which combines the ADS1248EVM with the MSP430-based MMB3 motherboard for use with a personal computer. The MMB3 motherboard allows the ADS1248EVM to connect to a computer via a USB port. The ADS1248EVM-PDK is controlled by the (...)

Features
  • Easy-to-use evaluation software for Microsoft™ Windows XP and Windows 7
  • Built-in analysis tools including scope, FFT, and histogram displays
  • Data collection to text files
  • Complete control of board settings
  • Easily expandable with new analysis plug in tools from Texas Instruments

Software development

SUPPORT SOFTWARE Download
SBAC144.ZIP (572 KB)
SUPPORT SOFTWARE Download
SBAC239.ZIP (15577 KB)

Design tools & simulation

SIMULATION MODELS Download
SBAM010.ZIP (120 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
  • (...)

Reference designs

REFERENCE DESIGNS Download
3-wire RTD Acquisition System Accurately Measures Temperature From -200°C - 850°C
TIPD120 This TI Precision Verified Design provides the theory, component selection, simulation, complete PCB schematic & layout, bill of materials, and measured performance of a single-supply, 3-wire RTD acquisition system that accurately measures temperature from  -200°C - 850°C.  The (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Bi-Directional Battery Initialization System Control Board Reference Design
PMP40280 — The PMP40280 is a battery initialization reference design solution for automotive and battery applications. The MCU TM4C123GH6PZ sets charging/discharging current and real time monitors battery voltage and charging/discharging current. It will calibrate system gain error to meet (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Fluxgate Based Displacement Sensor Reference Design
TIDA-00463 The TIDA-00463 showcases a displacement sensor for linear distance measurements in a BoosterPack form factor for TI LaunchPad.  The design is suitable for any application where a distance measurement, even through non-magnetic materials, is needed and non-contact, wear-free measurements are (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Analog Front End (AFE) for Sensing Temperature in Smart Grid Applications Using RTD Reference Design
TIDA-00110 This reference design enables up to 4 Resistor Temperature Detectors (RTD) to be connected through one ADC in manner such that the solution is both compact and modular. Communication from the ADC to the processor is though an SPI interface. If 8 RTDs are required for an application, simply connect (...)
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

CAD/CAE symbols

Package Pins Download
TSSOP (PW) 28 View options

Ordering & quality

Support & training

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