Home Data converters Analog-to-digital converters (ADCs) Precision ADCs
Home
Data converters
Analog-to-digital converters (ADCs)
Precision ADCs

ADS1247

ACTIVE

24-Bit, 2kSPS, 4-Ch Delta-Sigma ADC With PGA, Vref and 2x IDACs for Precision Sensor Measurement

Order now
Data sheet

A newer version of this product is available

open-in-new Compare alternates
Similar functionality to the compared device
ADS124S06 ACTIVE 24-bit, 4-kSPS, 6-ch delta-sigma ADC with PGA and voltage reference for precision sensor measurement More analog inputs (6), faster sample rate (4 kSPS)

ADS1247

ACTIVE
Data sheet Order now

Product details

Resolution (Bits) 24 Sample rate (max) (ksps) 2 Number of input channels 4 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode External, Internal Input voltage range (max) (V) 2.125, 4.25 Input voltage 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 105 Power consumption (typ) (mW) 2.3 Analog supply (min) (V) 2.7 Analog supply voltage (max) (V) 5.25 Digital supply (min) (V) 2.7 Digital supply (max) (V) 5.25
Resolution (Bits) 24 Sample rate (max) (ksps) 2 Number of input channels 4 Interface type SPI Architecture Delta-Sigma Input type Differential, Single-ended Multichannel configuration Multiplexed Rating Catalog Reference mode External, Internal Input voltage range (max) (V) 2.125, 4.25 Input voltage 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 105 Power consumption (typ) (mW) 2.3 Analog supply (min) (V) 2.7 Analog supply voltage (max) (V) 5.25 Digital supply (min) (V) 2.7 Digital supply (max) (V) 5.25
TSSOP (PW) 20 41.6 mm² 6.5 x 6.4
  • 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

All other trademarks are the property of their respective owners
  • 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

All other trademarks are the property of their respective owners

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.

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.
open-in-new Find other Precision ADCs
Download View video with transcript Video

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 13
Type Title Date
* Data sheet ADS124x 24-Bit, 2-kSPS, Analog-To-Digital Converters With Programmable Gain Amplifier (PGA) For Sensor Measurement datasheet (Rev. H) PDF | HTML 31 Mar 2016
Application note A Basic Guide to RTD Measurements (Rev. A) PDF | HTML 29 Mar 2023
Application note A Basic Guide to Thermocouple Measurements (Rev. A) PDF | HTML 29 Mar 2023
Application note Digital Filter Types in Delta-Sigma ADCs (Rev. A) PDF | HTML 29 Mar 2023
Application note RTD Ratiometric Measurements and Filtering Using the ADS1148 and ADS1248 (Rev. A) PDF | HTML 27 Mar 2023
Application note Calculating Conversion Latency and System Cycle Time for Delta-Sigma ADCs PDF | HTML 23 Mar 2022
Application note ADS124S08 3-Wire PT100 RTD Measurement Circuit w/ Low-Side Reference and 1 IDAC (Rev. B) 09 Sep 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
Technical article Four ways to improve your ADC system power supply rejection 25 Jun 2015
E-book Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs 19 Mar 2015
Technical article Leverage coherent sampling and FFT windows when evaluating SAR ADCs (Part 1) 13 Mar 2015
Application note Inputs Currents for High-Resolution ADCs 06 Mar 2003

Design & development

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

Evaluation board

ADS1248EVM-PDK — ADS1248 performance demonstration kit for 24-bit, 2-kSPS, eight-channel delta-sigma ADC

The ADS1248 evaluation module (EVM) performance demonstration kit (PDK) is an platform for evaluating the ADS1248 eight-channel, 24-bit, high-precision delta-sigma (ΔΣ) analog-to-digital converter (ADC). The EVM is designed to easily accept many types of analog temperature sensors, (...)

User guide: PDF | HTML
View options
Support software

ADS1x4x Firmware Example Code

SBAC144.ZIP (572 KB)
Download
Simulation model

ADS1x4x IBIS Model

SBAM010.ZIP (120 KB) - IBIS Model
Download
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 (...)
Design now
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 (...)
Download
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 (...)
Request
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
View options
Reference designs

TIPD120 — 3-wire RTD Acquisition System Accurately Measures Temperature From -200°C - 850°C

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.  (...)
User guide: PDF
Schematic: PDF
Reference designs

TIPD152 — 0°C – 100°C, Hardware-Compensated Ratiometric 3-Wire RTD System Reference Design

This TI Precision Verified Design implements a hardware compensated 3-wire RTD acquisition system that accurately measures temperature from  0°C - 100°C.  The voltage input and reference voltage are placed in a ratiometric configuration in order to reduce the errors from noise and (...)
User guide: PDF
Schematic: PDF
Package Pins Download
TSSOP (PW) 20 View options
TI's Standard Terms and Conditions for Evaluation Items apply.

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos