Automotive Auto-Dimming Mirror Reference Design for Electrochromic Mirrors


Design files


Modern vehicles utilize auto-dimming mirrors to prevent glare and visibility loss for the driver. This reference design utilizes modern human-eye-response ambient light sensors and a high-current amplifier stage to drive a capacitive electrochromic mirror load.

  • Human-eye-response light sensors
  • 10-bit output
  • 3.3V, 400mA capacitive load driver
  • Fast discharge of electrochromic load
  • Wide VBAT operation (up to 40V)

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.

TIDUDR8.PDF (1459 K)

Reference design overview and verified performance test data

TIDRW89.PDF (146 K)

Detailed schematic diagram for design layout and components

TIDRW90.PDF (55 K)

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

TIDRW91.PDF (92 K)

Detailed overview of design layout for component placement

TIDRW93.ZIP (654 K)

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


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

TIDRW92.PDF (463 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Ambient light sensors

OPT3001-Q1Automotive digital ambient light sensor (ALS) with high-precision human-eye response

Data sheet document-pdfAcrobat PDF open-in-new HTML
General-purpose op amps

TLV316-Q1Automotive-grade, single, 5.5-V, 10-MHz, RRIO operational amplifier

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

TPS7B69-Q1Automotive 150-mA, off-battery (40-V), high-PSRR, low-IQ, low-dropout voltage regulator

Data sheet document-pdfAcrobat PDF open-in-new HTML
Precision DACs (<=10MSPS)

DAC101C081Q10-Bit Micro Power Dig-to-Analog Converter

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

Technical documentation

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Type Title Date
* Design guide Automotive Auto-dimming Mirror Driver Reference Design for Electrochromic Mirror May 09, 2018

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