ADJD-J823

ADJD-J823 Datasheet

Agilent ADJD-J823 Color Management Controller with Integrated RGB Photosensor

Part	Datasheet
ADJD-J823	ADJD-J823 (pdf)

PDF Datasheet Preview
Agilent ADJD-J823 Color Management Controller with Integrated RGB Photosensor Data Sheet The ADJD-J823 is a CMOS mixed-signal IC with integrated RGB photosensors designed to be the optical feedback device of an RGB LED-based backlighting system. A typical system consists of an array of red, green and blue RGB LEDs, LED drivers and the ADJD-J823. The device samples the light output from the RGB LED array, processes the color information and adjusts the light output from the RGB LEDs until the target color is achieved. To achieve this, the device integrates an RGB photosensor array, an analog-to-digital converter front-end, a color data processing logic core and a high-resolution 12-bit PWM output generator. By employing a feedback system and the ADJD-J823, the light output produced by the LED array maintains its color over time and temperature. In addition, using a serial interface, specifying the color of the LED array’s light output is as simple as picking the target color coordinates from the CIE color space and writing several bytes of data to the device. The sensitivity of the device to light can be adjusted through an automated process. The PWM output signals control the on-time duration of the red, green and blue LEDs. That duration is continually adjusted in real-time to match the light output from the RGB LED array to the target color. • Integrated RGB photosensor • Integrated color management feedback controller • Serial Interface • Direct interface to standard I2C EEPROM • 3-channel 12-bit PWM output Red, Green and Blue LED channels • Built-in oscillator • LCD Backlighting Package Dimensions Seating Plane ± ref ± Note Dimensions are in millimeter mm Bottom View Pin 15 Pin 1 Pin 14 Pin 13 Pin 12 Pin 1 marker notch Pin 11 Pin Information PIN NAME 1 NC 2 PWMB 3 PWMG 4 PWMR 5 DGND 6 DGND 7 DVDD 8 AGND 9 CLKIO 10 XRST TYPE No connect Output Output Output Ground Power Ground Output Input 11 SCLSLV Input 12 SDASLV Input/Output tri-state high 13 SCLPROM Output 14 SDAPROM Input/Output tri-state high 15 SLEEP Input 16 AGND 17 AGND 18 AGND 19 AVDD 20 NC Ground Power No connect No connect. Leave floating. PWMB is the active-high blue pulse width modulation output pin. Tie it to the blue LED driver channel.

PDF Datasheet Preview

Agilent ADJD-J823 Color Management Controller with Integrated RGB Photosensor

Data Sheet

The ADJD-J823 is a CMOS mixed-signal IC with integrated RGB photosensors designed to be the optical feedback device of an RGB LED-based backlighting system. A typical system consists of an array of red, green and blue RGB LEDs, LED drivers and the ADJD-J823. The device samples the light output from the RGB LED array, processes the color information and adjusts the light output from the RGB LEDs until the target color is achieved. To achieve this, the device integrates an RGB photosensor array, an analog-to-digital converter front-end, a color data processing logic core and a high-resolution 12-bit PWM output generator.

By employing a feedback system and the ADJD-J823, the light output produced by the LED array maintains its color over time and temperature. In addition, using a serial interface, specifying the color of the LED array’s light output is as simple as picking the target color coordinates from the CIE color space and writing several bytes of data to the device.

The sensitivity of the device to light can be adjusted through an automated process. The PWM output signals control the on-time duration of the red, green and blue LEDs. That duration is continually adjusted in real-time to match the light output from the RGB LED array to the target color.
• Integrated RGB photosensor
• Integrated color management
feedback controller
• Serial Interface
• Direct interface to standard I2C

EEPROM
• 3-channel 12-bit PWM output Red, Green and Blue LED channels
• Built-in oscillator
• LCD Backlighting

Package Dimensions

Seating Plane
± ref
± Note Dimensions are in millimeter mm

Bottom View

Pin 15

Pin 1

Pin 14 Pin 13 Pin 12

Pin 1 marker notch

Pin 11

Pin Information PIN NAME 1 NC 2 PWMB
3 PWMG
4 PWMR
5 DGND 6 DGND 7 DVDD 8 AGND 9 CLKIO 10 XRST

TYPE No connect Output

Output

Output

Ground Power Ground Output Input
11 SCLSLV Input
12 SDASLV

Input/Output tri-state high
13 SCLPROM Output
14 SDAPROM Input/Output tri-state high
15 SLEEP

Input
16 AGND 17 AGND 18 AGND 19 AVDD 20 NC

Ground Power No connect

No connect. Leave floating.

PWMB is the active-high blue pulse width modulation output pin. Tie it to the blue LED driver channel.

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Datasheet ID: ADJD-J823 519925