TIDA-060025

Reference design maximizing transimpedance bandwidth for LIDAR and time-of-flight (ToF) applications

TIDA-060025

Design files

Overview

This design demonstrates a high-speed optical front-end with a Time of Flight (ToF) distance measurement circuit using a fiber-optic transmission medium, which can be adapted to any type of ToF measurement such as through free space. This design features an industry-leading 2.5-V output linear transimpedance front-end with 10 kΩ of gain and over 200-MHz bandwidth for high-accuracy measurements. The received signal is digitized using the TDC7201 converter operating in short time mode, which improves the measurement accuracy of the device from 12 ns to 250 ps, further reinforcing the high accuracy nature of the design. The measurement is controlled using the MSP430 microcontroller on a LaunchPad™ development kit for easy plug and play compatibility. Overall, the design achieves higher speed and accuracy, reduces complexity and lowers power compared to fully digitized designs that require high-speed ADCs and FPGAs.

Features
  • Optical front-end design with demonstrated time-of-flight measurement
  • High-Speed amplifier signal path with bandwidth greater than 200 MHz at Gain = 10 kΩ
  • Centimeter level measurement accuracy
  • High-speed transimpedance amplifier (TIA) for I-to-V conversion
  • Low computational cost and power requirements

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.

TIDUEL3.PDF (873 K)

Reference design overview and verified performance test data

TIDRXT3.PDF (258 K)

Detailed schematic diagram for design layout and components

TIDRXT2.PDF (54 K)

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

TIDRXT4.PDF (256 K)

Detailed overview of design layout for component placement

TIDRXT5.ZIP (2602 K)

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

TIDCF17.ZIP (3501 K)

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

TIDRXT6.PDF (1164 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

High-speed op amps (GBW>=50MHz)

OPA8585.5 GHz Gain Bandwidth Product, Decompensated Transimpedance Amplifier with FET Input

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Comparators

TLV35014.5ns, Rail-to-Rail, High Speed Comparator with Shutdown

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Direction-controlled voltage translators

SN74LVC1T45Single-Bit Dual-Supply Bus Transceiver with Configurable Voltage-Level Shifting and 3-State Outputs

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ESD & surge protection ICs

TVS140014V flat-clamp surge protection device

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Linear & low-dropout (LDO) regulators

TPS799200-mA, low-IQ, low-dropout voltage regulator with low-noise & enable

Data sheet document-pdfAcrobat PDF open-in-new HTML
Ultrasonic sensor AFEs

TDC7201TDC7201 Time-to-Digital Converter for Time-of-Flight Applications

Data sheet document-pdfAcrobat PDF open-in-new HTML
eFuses & hot swap controllers

TPS24005.5-V over voltage protection controller with 100-V input transient protection

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

Technical documentation

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* Design guide Reference Design Maximizing Transimpedance Bandwidth for LIDAR and ToF Nov. 28, 2018

Related design resources

Hardware development

EVALUATION BOARD
TDC7201-ZAX-EVM TDC7201 Ultra Measurement Range Time-to-Digital Converter Evaluation Module
DEVELOPMENT KIT
MSP-EXP430F5529LP MSP430F5529 USB LaunchPad development kit

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