TCS3472_17 Datasheet, PDF (4/40 Pages) ams AG – Red, Green, Blue (RGB), and Clear Light

Detailed Description
TCS3472 − Detailed Description
The TCS3472 light-to-digital converter contains a 3 × 4
photodiode array, four analog-to-digital converters (ADC) that
integrate the photodiode current, data registers, a state
machine, and an I²C interface. The 3 × 4 photodiode array is
composed of red-filtered, green-filtered, blue-filtered, and
clear (unfiltered) photodiodes. In addition, the photodiodes are
coated with an IR-blocking filter. The four integrating ADCs
simultaneously convert the amplified photodiode currents to a
16-bit digital value. Upon completion of a conversion cycle, the
results are transferred to the data registers, which are
double-buffered to ensure the integrity of the data. All of the
internal timing, as well as the low-power wait state, is controlled
by the state machine.
Communication of the TCS3472 data is accomplished over a
fast, up to 400 kHz, two-wire I²C serial bus. The industry
standard I²C bus facilitates easy, direct connection to
microcontrollers and embedded processors.
In addition to the I²C bus, the TCS3472 provides a separate
interrupt signal output. When interrupts are enabled, and
user-defined thresholds are exceeded, the active-low interrupt
is asserted and remains asserted until it is cleared by the
controller. This interrupt feature simplifies and improves the
efficiency of the system software by eliminating the need to
poll the TCS3472. The user can define the upper and lower
interrupt thresholds and apply an interrupt persistence filter.
The interrupt persistence filter allows the user to define the
number of consecutive out-of-threshold events necessary
before generating an interrupt. The interrupt output is
open-drain, so it can be wire-ORed with other devices.
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ams Datasheet
[v1-02] 2016-Feb-08