LCR meter analog front end reference design


Design files


This reference design, TIDA-060029 demonstrates an analog signal chain solution for LCR Meter applications using an auto balancing impedance measurement method.

  • Measures wide range of components (L, C, R) with impedance values ranging from 1 Ω to 10 MΩ
  • Frequency of operation up to 100 kHz
  • Tested at 100 Hz, 1 kHz, 10 kHz, 100 kHz
  • Impedance accuracy of 0.1 %
  • Inherently stable operation of the signal chain
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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.


Reference design overview and verified performance test data

TIDM635.PDF (264 K)

Detailed schematic diagram for design layout and components

TIDM636.PDF (92 K)

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

TIDM637.PDF (411 K)

Detailed overview of design layout for component placement

TIDM639.ZIP (887 K)

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


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

TIDM638.PDF (733 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

High-speed op amps (GBW ≥ 50 MHz)

BUF634A210-MHz, 250-mA high-speed buffer

Data sheet: PDF | HTML
High-speed op amps (GBW ≥ 50 MHz)

OPA2810Dual channel, high performance, 27 V, 105 MHz, RRIO FET input op amp

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Design guide LCR Meter Analog Front-End Reference Design (Rev. B) PDF | HTML Dec. 21, 2021

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