Optical Sensor Ambient I2C 6-UDFN Exposed Pad ## Engineering Specification ## General Description The **MAX44009EDT+T** is an Analog Devices / Maxim Integrated digital ambient light sensor designed for portable electronics, display brightness control, industrial sensors, embedded systems, and low-power optical sensing applications. It integrates an ambient light photodiode, signal conditioning, analog-to-digital conversion, and an I²C digital output interface in a compact surface-mount package. The device is suitable for systems requiring automatic brightness adjustment, low current consumption, and light measurement behavior that closely follows human-eye response. ## Device Identification Manufacturer Part Number: **MAX44009EDT+T** Manufacturer: **Analog Devices / Maxim Integrated** Product Series: **MAX44009** Device Category: **Sensor Integrated Circuit** Device Type: **Digital Ambient Light Sensor** Sensor Interface: **I²C Digital Output** Mounting Type: **Surface Mount** Package Type: **UTDFN-Opto / UDFN** ## Functional Description The device functions as a digital ambient light sensor that measures surrounding light intensity and reports the measurement through an I²C interface. It is designed to help electronic systems adjust display brightness, conserve power, improve user visibility, and respond to changes in lighting conditions. The integrated optical sensing and digital conversion circuitry reduce the need for external analog signal-conditioning components. ## Optical Sensing Description The sensor includes an on-chip photodiode with spectral response optimized to approximate human-eye sensitivity. It also incorporates infrared and ultraviolet blocking capability to improve ambient light measurement accuracy. The adaptive gain function automatically selects the appropriate measurement range, allowing the device to operate across very low-light and bright-light conditions. ## Electrical Description The **MAX44009EDT+T** operates from a low-voltage supply range and is optimized for ultra-low power consumption. It supports digital communication through an I²C interface and is suitable for battery-powered and energy-sensitive systems. Proper supply decoupling, pull-up resistor selection, and bus voltage compatibility should be considered during circuit design. ## Package and Mechanical Description The component is supplied in a compact surface-mount optical package suitable for space-constrained printed circuit board designs. The package is intended for placement where the optical sensing window has access to ambient light while maintaining proper mechanical protection from contamination, shadowing, and enclosure obstruction. ## Interface and Control Description The device communicates with a host microcontroller or processor through an I²C digital interface. The host can read ambient light data and configure device behavior through register-based communication. The selectable I²C addressing feature supports flexible integration in systems that may include multiple I²C peripherals. ## Mounting and Assembly Description The **MAX44009EDT+T** is intended for surface-mount PCB assembly using standard reflow soldering processes. PCB layout should follow the manufacturer’s recommended footprint and assembly guidance. The optical sensing area should remain unobstructed, clean, and aligned with the product enclosure opening or light pipe when used. ## Application Suitability The device is suitable for smartphones, tablets, notebooks, wearable electronics, handheld devices, display brightness control, industrial light sensing, smart home devices, battery-powered equipment, sensor modules, and embedded systems requiring digital ambient light detection. ## Design Considerations The design should account for sensor placement, optical window design, enclosure transparency, light pipe geometry, I²C bus pull-up values, supply voltage compatibility, ambient interference, temperature conditions, and contamination protection. The sensor should not be blocked by opaque materials or placed where shadows, reflections, or nearby LEDs may distort the measured ambient light level. ## Hashtags #commonpartslibrary #integratedcircuit #sensor #ambientlightsensor #digitalsensor #opticalsensor #analogdevices #maximintegrated #max44009 #max44009edt #i2csensor #lightmeasurement #brightnesscontrol #lowpowersensor #portableelectronics #displaycontrol #embeddedhardware #embeddeddesign #smdcomponent #surfacemount #utdfnpackage #uDFNpackage #pcbdesign #hardwaredesign #electronicscomponents #electronicparts #componentlibrary #engineeringparts #electronicsengineering

Magnetic Sensors LIS2MDLTR LGA-12_L2.0-W2.0-P0.50-BL LCSC Part Number: C919695 JLCPCB Part Class: Extended Part Manufactured by ST(意法半导体) STMicroelectronics LIS2MDL ultralow-power high-performance 3-axis digital magnetometer, ±50 gauss magnetic dynamic range, 16-bit data output, SPI and I2C serial interfaces, 1.71V to 3.6V analog supply voltage, selectable power modes and resolution, single measurement mode, programmable interrupt generator, embedded self-test and temperature sensor, -40°C to +85°C operating range, LGA-12 package 2.0 x 2.0 x 0.7mm. Search Keywords: LIS2MDL, LIS2MDLTR, ST LIS2MDL, STMicroelectronics LIS2MDL, LIS2MDL magnetometer, 3-axis magnetometer, digital magnetic sensor, 3-axis digital magnetic sensor, ±50 gauss magnetometer, I2C SPI magnetometer, 16-bit magnetometer, low power magnetometer, compass sensor, LGA-12 magnetometer, 2x2mm magnetometer Hashtags: #LIS2MDL #LIS2MDLTR #STMicroelectronics #Magnetometer #3AxisMagnetometer #DigitalMagneticSensor #CompassSensor #I2CSensor #SPISensor #16BitSensor #LowPowerSensor #50GaussSensor #LGA12

Sensor Modules BME280 Environmental Sensor LGA-8_BME280_BL LCSC Part Number: C431940 JLCPCB Part Class: Extended Part Manufactured by Waveshare(微雪电子) Bosch BME280 combined digital humidity, barometric pressure and temperature environmental sensor, compact metal-lid LGA package with 2.5 x 2.5mm footprint and 0.93mm height, low power consumption for battery-powered devices, high accuracy humidity and pressure measurement, integrated temperature sensor for compensation and ambient temperature estimation, SPI and I2C interfaces, 1.71V to 3.6V sensor supply range, 1.2V to 3.6V interface supply range, sleep/normal/forced operating modes, current consumption down to 0.1µA in disabled state, suitable for indoor navigation, home automation, health care, GPS refinement and weather monitoring applications. Search Keywords: BME280, Bosch BME280, Bosch Sensortec BME280, BME280 environmental sensor, BME280 humidity pressure temperature sensor, BME280 barometric pressure sensor, BME280 temperature humidity sensor, BME280 I2C SPI sensor, BME280 LGA, 2.5x2.5mm sensor, low power environmental sensor, digital humidity sensor, digital pressure sensor, BMP280 compatible sensor, BME280 datasheet Hashtags: #BME280 #BoschBME280 #BoschSensortec #EnvironmentalSensor #HumiditySensor #PressureSensor #TemperatureSensor #BarometricPressureSensor #DigitalSensor #I2CSensor #SPISensor #LowPowerSensor #LGA8 #25x25mmSensor #IndoorNavigationSensor #WeatherSensor