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Product details

Parameters

Resolution (Bits) 16 Number of input channels 12 Sample rate (Max) (kSPS) 4 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) 2.625, 5.25 Input range (Min) (V) -2.625, 0 Features 50/60 Hz Rejection, Excitation Current Sources (iDACs), GPIO, Oscillator, PGA, Temp Sensor Operating temperature range (C) -50 to 125 Power consumption (Typ) (mW) 1.75 Analog voltage AVDD (Min) (V) 2.7 Analog voltage AVDD (Max) (V) 5.25 INL (Max) (+/-LSB) 1 Digital supply (Min) (V) 2.7 Digital supply (Max) (V) 3.6 open-in-new Find other Precision ADCs (<=10MSPS)

Package | Pins | Size

TQFP (PBS) 32 49 mm² 7 x 7 VQFN (RHB) 32 25 mm² 5 x 5 open-in-new Find other Precision ADCs (<=10MSPS)

Features

  • Low Power Consumption: As Low as 280 µA
  • Programmable Gain: 1 to 128
  • Programmable Data Rates: 2.5 SPS to 4 kSPS
  • Simultaneous 50-Hz and 60-Hz Rejection at
    ≤ 20 SPS with Low-Latency Digital Filter
  • Analog Multiplexer with 12 (ADS114S08) or 6 (ADS114S06) Independently Selectable Inputs
  • Dual-Matched Programmable Current Sources for Sensor Excitation: 10 µA to 2000 µA
  • Internal Reference: 2.5 V, 10 ppm/°C (max) Drift
  • Internal Oscillator: 4.096 MHz, 1.5% Accuracy
  • Internal Temperature Sensor
  • Extended Fault Detection Circuits
  • Self Offset and System Calibration
  • Four General-Purpose I/Os
  • SPI-Compatible Interface with Optional CRC
  • Analog Supply: Unipolar (2.7 V to 5.25 V) or Bipolar (±2.5 V)
  • Digital Supply: 2.7 V to 3.6 V
  • Operating Temperature: –50°C to +125°C
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Description

The ADS114S06 and ADS114S08 are precision, 16-bit, delta-sigma (ΔΣ), analog-to-digital converters (ADCs) that offer low power consumption and many integrated features to reduce system cost and component count in applications measuring small-signal sensors.

These ADCs feature configurable digital filters that offer low-latency conversion results and 50-Hz or
60-Hz rejection for noisy industrial environments. A low-noise, programmable gain amplifier (PGA) provides gains ranging from 1 to 128 to amplify low-level signals for resistive bridge or thermocouple applications. Additionally, these devices integrate a low-drift, 2.5-V reference that reduces printed circuit board (PCB) area. Finally, two programmable excitation current sources (IDACs) allow for easy and accurate RTD biasing.

An input multiplexer supports 12 inputs for the ADS114S08 and six inputs for the ADS114S06 that can be connected to the ADC in any combination for design flexibility. In addition, these devices include features such as sensor burn-out detection, voltage bias for thermocouples, system monitoring, and four general-purpose I/Os.

The devices are offered in a leadless VQFN-32 or a TQFP-32 package.

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Technical documentation

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Type Title Date
* Data sheet ADS114S0x Low-Power, Low-Noise, Highly Integrated, 6- and 12-Channel, 4-kSPS, 16-Bit, Delta-Sigma ADC with PGA and Voltage Reference datasheet (Rev. A) Jun. 13, 2017
Application note ADS124S08 3-Wire PT100 RTD Measurement Circuit w/ Low-Side Reference and 1 IDAC (Rev. B) Sep. 09, 2021
Application note Communication Methods for Data Integrity Using Delta-Sigma Data Converters (Rev. A) Aug. 23, 2021
Application note RTD Wire-Break Detection Using Precision Delta-Sigma ADCs Feb. 18, 2021
E-book Fundamentals of Precision ADC Noise Analysis Jun. 19, 2020
Application note K-type thermocouple measurement circuit with precision ADC Mar. 19, 2019
Application note A Basic Guide to Thermocouple Measurements Sep. 28, 2018
Application note QFN and SON PCB Attachment (Rev. B) Aug. 24, 2018
Application note A Basic Guide to RTD Measurements Jun. 19, 2018
Application note Comparing the ADS114S06 and ADS114S08 Standard and Cost-Optimized (B-Grade) ADCs May 07, 2018
Application note Digital Filter Types in Delta-Sigma ADCs Jun. 27, 2017
User guide ADS1x4S08 Evaluation Module User's Guide (Rev. A) May 31, 2017
Application note How delta-sigma ADCs work, Part 1 (Rev. A) Sep. 19, 2016
Application note RTD Ratiometric Measurements and Filtering Using the ADS1148 and ADS1248 Mar. 13, 2013
Application note How delta-sigma ADCs work, Part 2 Nov. 09, 2011

Design & development

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

Hardware development

EVALUATION BOARD Download
document-generic User guide
Description

The ADS114S08 evaluation module (EVM) is a platform for evaluation of the ADS114S08 analog-to-digital converter (ADC). The ADS114S08 is a 16-bit, 4-kSPS, 12-channel, low-power delta-sigma ADC for sensor measurement and process control applications. The ADS114S08 also includes a highly-accurate (...)

Features
  • Includes all required support circuitry for ADS114S08
  • Delta-Sigma ADC EvaluaTIon Software (DELTASIGMAEVAL-GUI) enables quick configuration and analysis
  • Configurable inputs, references, and supplies
  • Easily accessible signals via test points and headers

Software development

APPLICATION SOFTWARE & FRAMEWORK Download
Temperature-sensor (RTD, thermocouple, thermistor) firmware for precision ADCs
ADC-TEMP-SENSOR-FW This temperature-sensor linearization firmware provides a software routine for measuring and linearizing most common temperature sensors, including resistance temperature detectors (RTDs), thermocouples, thermistors (NTC, PTC, etc.), and analog temperature sensors.

This software includes an (...)

Features
  • Complete firmware for temperature-to-digital conversion
  • Supports common temperature-sensor types:
    • RTDs (PT100, PT1000, Ni120, etc.)
    • Thermocouples (type K, J, B, T, etc.)
    • Thermistors (PTC, NTC)
    • Analog temperature sensors
  • Easy to modify for multiple sensors
  • Use with other precision ADCs with minimal design (...)
SUPPORT SOFTWARE Download
SBAC159.ZIP (4877 KB)

Design tools & simulation

SIMULATION MODEL Download
SBAM319.ZIP (57 KB) - IBIS Model
SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SIMULATION TOOL 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 TOOL Download
Analog-to-digital converter (ADC) input driver design tool supporting multiple input types
ADC-INPUT-CALC 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 (...)
CALCULATION TOOL Download
ADS124S08 design calculator
ADS124S08-EXCEL-CALC-TOOL The ADS124S08 Excel™ calculator tool provides the user with several easy-to-use tools to simplify the configuration of the ADS114S06, ADS114S08, ADS124S06, and ADS124S08. To ensure proper device functionality, the tool includes a common-mode-range calculator to easily determine if the (...)
Features
  • PGA common-mode-range calculator
  • Complete register map
  • Analog-to-digital converter (ADC) code-conversion calculator
  • Digital filter plot + settling time + normal-mode rejection
  • CRC calculator
  • Calibration calculations
CALCULATION TOOL 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
  • (...)

CAD/CAE symbols

Package Pins Download
TQFP (PBS) 32 View options
VQFN (RHB) 32 View options

Ordering & quality

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

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Support & training

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