1 Features

• AEC-Q100 qualified for automotive applications:

– Temperature grade 2: –40°C to +105°C, TA

• High-precision, high-speed light-to-digital

conversion over high-speed I2C interface

• Visible channel:

– Precision optical filtering closely matches

human eye with excellent near infrared (NIR)

rejection

– 28 bits of effective dynamic range:

535 μlux to 143 klux

• Near IR channel:

– Precision optical filtering provides high NIR

sensitivity with excellent visible rejection

– 26-bits of effective dynamic range: 409 pW/cm2

to 27 mW/cm2

• Semi-logarithmic output:

– 9 (visible channel) and 7 (NIR channel) binary

logarithmic full-scale light ranges

– Highly linear response within each range

• Built-in automatic full-scale light range selection

logic that switches measurement range based on

input light condition for best possible resolution at

all times

• 12 configurable conversion times:

– 600 μs to 800 ms per channel for high-speed

and high-precision applications

• External pin interrupt for hardware-synchronized

trigger and interrupts

• Error correction code features for improved

reliability in automotive use cases

• Internal FIFO for output registers with I2C burst

readout

• Low operating current: 30 μA

• Ultra-low power standby: 2 μA

• Operating temperature range: –40°C to +105°C

• Wide power-supply range: 1.6 V to 3.6 V

• 5.5-V tolerant I/O pins

• Selectable I2C address

• Small-form factor: 2 mm × 2 mm × 0.65 mm

2 Applications

• Automotive interior and exterior lighting

• Infotainment and clusters

• Electrochromatic and smart mirrors

• Wiper modules

• Head-up display systems

• Automotive camera systems

3 Description

The OPT4003-Q1 is a dual-channel, light-to-digital sensor (single-chip lux meter and NIR power meter) that

independently measures the intensity of visible and near infrared (NIR) light. To measure accurate visible light

intensity, a specially engineered filter on the device tightly matches the photopic response of the human eye and

rejects the near-infrared component from common light sources. The NIR channel filter is specially engineered

to provide high sensitivity to wavelengths in the near infrared region while achieving high rejection of visible

wavelengths with a sharp cutoff at 800 nm. The output of the OPT4003-Q1 is semi-logarithmic with binary

logarithmic full-scale light ranges along with a highly linear response within each range. The visible channel

provides nine binary light ranges, providing measurement capability from 535 μlux to 143 klux and 28 bits of

effective dynamic range. The NIR channel provides seven light ranges, providing measurement capability from

409 pW/cm2 to 27 mW/cm2 and 26 bits of effective dynamic range. The built-in automatic range selection logic

dynamically adjusts the device gain settings based on the light level, providing the best possible resolution in all

conditions without user input.

The OPT4003-Q1 is equipped with engineered optical filters on both channels, providing strong out-of-band

rejection. Strong infrared rejection on the visible channel aids in maintaining high lux accuracy across all light

sources, especially when the sensor is placed under dark glass for aesthetic reasons. The NIR channel robust

rejection of visible wavelengths and sharp cutoff at 800 nm enables precise near-infrared measurements under

mixed lighting conditions, including high levels of visible light.

The OPT4003-Q1 is designed for systems that require light level detection to enhance user experience

and typically replaces low-accuracy photodiodes, photoresistors, and other ambient light sensors with

underwhelming human eye matching and near-infrared rejection.

The OPT4003-Q1 can be configured to operate with light conversion times from 600 μs to 800 ms per channel

in 12 steps, providing system flexibility based on application need. Conversion time includes the light integration

time and analog-to-digital (ADC) conversion time. Measurement resolution is determined by a combination of

light intensity and integration time, effectively providing the capability to measure down to 535 μlux of light

intensity changes.

Digital operation is flexible for system integration. Measurements can be either continuous or triggered in one

shot with register writes or a hardware pin. The device features a threshold detection logic, which allows the

processor to sleep while the sensor waits for an appropriate wake-up event to report through the interrupt pin.

The sensor reports a digital output representing the light level over an I2C- and SMBus-compatible, two-wire

serial interface. An internal first-in-first-out (FIFO) on the output registers is available to read out measurements

from the sensor at a slower pace while still preserving all data captured by the device. The OPT4003-Q1 also

supports I2C burst mode, thus helping the host read data from the FIFO with minimal I2C overhead.

The low power consumption and low power-supply voltage capability of the OPT4003-Q1 helps enhance the

battery life of battery-powered systems.