ADC-RTD-CONFIG-CALC

Resistance temperature detector (RTD) configuration calculator for precision ADCs

ADC-RTD-CONFIG-CALC

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Overview

This resistance temperature detector (RTD) configuration calculator is a Microsoft® Excel-based tool that helps the user identify a system solution for an RTD application. Two-, three- and four-wire RTD configurations are shown by default, with options for a high-side or low-side reference resistor and one or two integrated digital-to-analog converter (IDAC) current sources for the three-wire RTD.

Additionally, the calculator supports a wide variety of RTD types and precision analog-to-digital converters (ADCs). Use this calculator to select the reference and bias resistor values, IDAC current and gain setting for each configuration. Moreover, the calculator provides a first-order approximation of the total error to the help the user identify the largest error sources in the system.

Features

Determine system parameters for up to five different RTD configurations
Integrated algorithm optimizes reference and bias resistor values (macros must be enabled)
Configure the system with any of the precision ADCs commonly used in RTD measurements
Supports two-, three- and four-wire RTDs, as well as high-side and low-side reference resistors
Choose from a wide variety of different RTD types, including Pt, Ni, Cu, and NiFe
First-order error approximations before and after calibration

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Calculation tool

ADC-RTD-CONFIG-CALC — RTD Configuration Calculator for Precision ADCs

Supported products & hardware

Products

Precision ADCs

ADS1120 — 16-bit, 2-kSPS, 4-ch, low-power, small-size delta-sigma ADC with PGA, VREF, 2x IDACs & SPI interface

ADS112C04 — 16-bit, 2-kSPS, 4-ch, low-power, small-size delta-sigma ADC with PGA, VREF, 2x IDACs & I2C interface

ADS112U04 — 16-bit, 2-kSPS, 4-ch, low-power, small-size delta-sigma ADC w/ PGA, VREF, 2x IDACs & UART interface

ADS114S06 — 16-bit, 4-kSPS, 6-ch delta-sigma ADC with PGA and voltage reference for sensor measurement

ADS114S06B — 16-bit, 4-kSPS, 6-ch delta-sigma ADC With PGA and voltage reference for low-cost applications

ADS114S08 — 16-bit, 4-kSPS, 12-ch delta-sigma ADC with PGA and voltage reference for sensor measurement

ADS114S08B — 16-bit, 4-kSPS, 12-ch delta-sigma ADC with PGA and voltage reference for low-cost applications

ADS1220 — 24-bit, 2-kSPS, four-channel, low-power, delta-sigma ADC with PGA, VREF, SPI and two IDACs

ADS122C04 — 24-bit, 2-kSPS, 4-ch, low-power, small-size delta-sigma ADC with PGA, VREF, 2x IDACs & I2C interface

ADS122U04 — 24-bit, 2-kSPS, 4-ch, low-power, small-size delta-sigma ADC w/ PGA, VREF, 2x IDACs & UART interface

ADS124S06 — 24-bit, 4-kSPS, 6-ch delta-sigma ADC with PGA and voltage reference for precision sensor measurement

ADS124S08 — 24-bit, 4-kSPS, 12-ch delta-sigma ADC with PGA and voltage reference for sensor measurement

ADS125H01 — 24-bit, 40-kSPS, 1-ch delta-sigma ADC with low-noise PGA and ±20-V input

ADS125H02 — 24-bit, 40-kSPS, 2-ch delta-sigma ADC with ±20-V input, PGA, IDACs, GPIOs and VREF

ADS1260 — 24-bit, 40-kSPS, 5-ch delta-sigma ADC with PGA, VREF and IDACs for factory automation

ADS1261 — 24-bit, 40-kSPS, 10-ch delta-sigma ADC with PGA, VREF, IDACs & AC excitation for factory automation

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ADC-RTD-CONFIG-CALC — RTD Configuration Calculator for Precision ADCs

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Latest version

Version: 01.00.00.0B

Release date: 12 Mar 2023

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RTD Configuration Calculator for Precision ADCs (zip) — 1549 K

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