TCS34727FN datasheet(5/41 Pages) OSRAM

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[v1-04] 2020-Apr-10

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.

Detailed Description

TCS34727FN Datasheet(PDF) 5 Page - OSRAM GmbH