VD6283TX datasheet(3/59 Pages) STMICROELECTRONICS

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Table 2. VD6283TX45/1 channel affectation

Channel number

Filter color

Channel 1

Red

Channel 2

Visible

Channel 3

Blue

Channel 4

Green

Channel 5

Channel 6

Clear

Table 3. Key functional parameters

Parameter

Value

I2C

Fast mode (400 kHz) and Fast mode plus (1 MHz)

Programmable I2C address (see Section 3.4.2 I2C new

device address)

Channels

6 color channels with independent, parallel reading for ALS or

flicker operations: red, visible, blue, green, IR, and clear.

1 dedicated fast channel for light flicker measurement

1 internal dark channel

ADC type

24 bit (16 bit + 8 bit, for high accuracy under low light)

Exposure time (EXTIME)

Integration time step size: 1.6 ms typical

Number of integration steps: 1 to 1024 (1.6 ms to 1.6 s)

Readout time

ALS readout: 6 ms typical (fixed) for all channels together.

This must be added to EXTIME for overall sensing operations.

For example, EXTIME 24 ms and readout 6 ms -> 30 ms

overall operation (33 Hz).

AC flicker frequency: raw signal (PDM) is output continuously

through GPIO2.

Analog gain

15 programmable gains for high-dynamic range: 66x, 50x,

33x, 25x, 16x, 10x, 7.1x, 5x, 3.33x, 2.5x, 1.67x, 1.25x, 1x,

0.83x, 0.71x.

Independent and selectable per channel

Inter measurement period

256 steps of 20 ms (from 0 ms to 5.12 s)

Light analog flicker detection

Minimum frequency detection: 100 Hz

Maximum frequency detection: 2 kHz

The PDM signal is routed out of GPIO2 and filtered by

an external RC filter to get a continuous analog signal

(Figure 4. Application schematic, ALS and flicker in analog

format)

FFT (Fast Fourier Transform) computation required at host

level for highest frequency detection accuracy. This is

recommended for better screening of the light fundamental

and harmonic extraction, especially with respect to multi tone

frequencies (combined light sources).

VD6283TX

Product overview

DS13735 - Rev 1

page 3/59

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