TIDA-00662

High Performance Capacitive Sensor Front-End Reference Design

TIDA-00662

Design files

Overview

The TIDA-00662 is a high performance capacitive sensor front-end reference design. With the usage of an audio codec including a programmable miniDSP functionality impedance measurement and change in phase detection is realized. The frequency-domain sensing front-end is for pressure and flow transmitters applications, as well as any other application with capacitive sensor elements.

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Features
  • Frequency-domain sensing extracts exact phase differences to measure impedance- and phase-changes
  • Suitable for pressure & flow transmitters where capacitive sensors are used
  • Use of audio codec miniDSP functions measure impedance/phase change
  • Physical form factor in BoosterPack for compatibility with all TI LaunchPads

A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUBV9B.PDF (4709 K)

Reference design overview and verified performance test data

TIDRMC7.PDF (1780 K)

Detailed schematic diagram for design layout and components

TIDRMC8.PDF (75 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDRMC9.PDF (454 K)

Detailed overview of design layout for component placement

TIDRMD1.PDF (658 K)

Detailed overview of design layout for component placement

TIDRMD3.ZIP (3785 K)

Files used for 3D models or 2D drawings of IC components

TIDCCB4.ZIP (343 K)

Design file that contains information on physical board layer of design PCB

TIDRMD0.PDF (2176 K)

PCB layer plot file used for generating PCB design layout

TIDRMD2.PDF (3951 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Audio CODECs

TLV320AIC3254Very Low-Power Stereo Audio CODEC with programmable miniDSP

Data sheet document-pdfAcrobat PDF open-in-new HTML
Linear & low-dropout (LDO) regulators

TPS736400-mA, high-accuracy, ultra-low-dropout voltage regulator with reverse current protection & enable

Data sheet document-pdfAcrobat PDF open-in-new HTML
MSP430 microcontrollers

MSP430F552925 MHz MCU with 128KB Flash, 8KB SRAM, 12-bit ADC, comparator, DMA, UART/SPI/I2C, USB, HW multiplier

Data sheet document-pdfAcrobat PDF open-in-new HTML
Precision op amps (Vos<1mV)

OPA2376Dual, precision, low-noise, low quiescent current operational amplifier

Data sheet document-pdfAcrobat PDF open-in-new HTML
Precision op amps (Vos<1mV)

OPA317Low Offset, Rail-to-Rail I/O Operational Amplifier

Data sheet document-pdfAcrobat PDF open-in-new HTML
Precision op amps (Vos<1mV)

OPA376Precision (0.025mV), low noise (7.5nV/rtHz), low quiescent current (760uA) op amp

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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* Design guide High-Performance Capacitive Sensor Front-End Reference Design (Rev. B) Aug. 01, 2017

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