The TSL2562 and TSL2563 Light-to-Digital Converters from TAOS combines a broadband photodiode (350 nm to 1100 nm) with a visible light blocking photodiode in a single CMOS integrated circuit. With integrated analog-to-digital conversion circuitry, data is output via a serial interface using I2C standard protocol.

For more information please use the links to the right

Features

• Low 2.5-V Input Voltage and 1.8-V Digital Output
• Approximates Human eye Response
• Precisely Measures Illuminance in Diverse Lighting Conditions
• Programmable Interrupt Function with User Defined Upper and Lower Threshold Settings
• 16-Bit Digital Output with SMSBus
• Programmable Analog Gain and Integration Time
• Supporting 1,000,000-to-1 Dynamic Range
• Available in Ultra-Small 1.25mm x 1.75mm Chipscale Package

Description

The TSL2562 and TSL2563 are low-voltage light-to-digital converters that transform light intensity to a digital signal output. Each device combines one broadband photodiode (visible plus infrared) and one infrared-responding photodiode operating from a single 2.5V supply and is capable of providing a near-photopic response over an effective 20-bit dynamic range (16-bit resolution).

Two integrating ADCs convert the photodiode currents to a digital output that represents the irradiance measured on each channel. This digital output can be input to a microprocessor where illuminance (ambient light level) in lux is derived using an empirical formula to approximate the human eye response.

While useful for general purpose light sensing applications, the TSL2562/63 devices are designed particularly for display panels (LCD, OLED, etc.) with the purpose of extending battery life and providing optimum viewing in diverse lighting conditions. Display panel backlighting, which can account for up to 30 to 40 percent of total platform power, can be automatically managed.

Use the links below to view all of the TAOS light-sensing products as well as their data sheets:

· The TAOS family of intelligent opto sensors includes:

o Light-to-Voltage Sensors
Low-cost, photodiode with integrated transimpedance amplifier delivering linear analog voltage output

o Light-to-Frequency Sensors
Large input dynamic range measuring light intensity with pulse train or square wave digital output

o Linear Sensor Arrays
Spatial relationship optical sensor for imaging, encoding or edge detection with high linearity and uniformity

o Light to Digital Sensors
Digital light level measurement in units of lux approximating the human eye response

o Color Sensors
RGB filtered sensors for color discrimination, determination, and measurement.

About Texas Advanced Optoelectronic Solutions (TAOS), Inc. : Shaping the Future of Light Sensing Solutions

Texas Advanced Optoelectronic Solutions, Incorporated (TAOS) is based in Plano, Texas (a suburb of Dallas). Established in 1998, the company mission is "To Redefine Optoelectronic Solutions to Provide Cost and Performance Advantages by Creating and Managing Technology."

Historically, applications that require the sensing of light stimulus to execute a function have been implemented by either a photodiode or phototransistor – neither of which support the emerging needs for higher performance optical sensor-based applications.

Utilizing state-of-the-art technology, our semiconductor devices combine precision mixed-signal functionality with photo-detectors on the same integrated circuit to produce products with performance and cost advantages over conventional solutions. TAOS's intelligent opto sensors simplify the measurement and analog-to-digital conversion of light, and are designed to reduce the need for signal conditioning or pre-processing circuitry in light-centric systems. Our light sensing solutions improve system performance and reduce design-cycle time giving designers the flexibility and performance they require at an attractive system cost.