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AS73211

General Description

Datasheet

• PUBLIC

DS000556

• v3-01 • 2018-Feb-07

│ 4

1.1

Key Benefits & Features

The benefits and features of AS73211, XYZ True Color Sensor with I²C Interface, are listed below:

Figure 1:

Added Value of Using AS73211

Benefits

Features

Light control measurement based on CIE

1931/DIN 5033

JENCOLOR® interference filter technology

Brightness, color coordinate and/or color

temperature control

High dynamic range up to 3.43E+10

(16 …24 Bit

ADC)

Usable under poor lighting conditions

High sensitivity up to 2.1M counts/(µW/cm²)

Smallest LSB 0.5pW/cm²

Mobile applications

Low power operation, Power on Reset, Power

down and standby, small QFN package

Harsh environmental applications

-40°C up to 125°C operation temperature range

Temperature compensation

On-chip temperature sensor

1.2

Applications

●

LED lighting control management for solid-state lighting applications (SSL)

●

Cabin lighting, daylight management / Human and Color Centric Lighting (HCL and CCL)

●

Ambient light color detection / correction

●

(O)LED display aging compensation and dynamic display color balancing

●

Portable light color measurement

●

Digital light projection (DLP)

●

Printer, Smartphone, PDA, tablet PCs, LCD-TVs, digital picture, frames, digital cameras color

enhancement

●

Photometry (brightness, color coordinate and/or color temperature)

1.3

Block Diagram

Figure 2 shows the main components of the AS73211. The photodiodes convert the incoming light to

a photo current and with subsequent current-to-digital converter to digital data. An internal reference

generator provides all necessary references for the A/D conversion and the photodiodes by using an

external resistor REXT at pin REXT. The results of the A/D conversion are stored in three 16-bit

registers and can be accessed via I²C interface. For the externally triggered start or start and stop of

the measurement, the input pin SYN can be used. The output READY reflects the status of the

conversion. The internal temperature sensor delivers the on-chip temperature, stored as 12-bit value

in a 16-bit register, which can be accessed via I²C interface, too. The pins A0 and A1 set the I²C slave

address. Separated analog and digital power supply and ground pins reduces noise coupling.

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