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TCS37717FN Datasheet, PDF (4/48 Pages) List of Unclassifed Manufacturers – The benefits and features of the TCS3771 are listed below
Detailed Description
TCS3771 − Detailed Description
The TCS3771 light-to-digital device contains a 4 × 4 photodiode
array, integrating amplifiers, ADCs, accumulators, clocks,
buffers, comparators, a state machine, and an I2C interface. The
4 × 4 photodiode array is composed of red-filtered,
green-filtered, blue-filtered, and clear photodiodes - four of
each type. Four integrating ADCs simultaneously convert the
amplified photodiode currents to a digital value providing up
to 16 bits of resolution. Upon completion of the conversion
cycle, the conversion result is transferred to the data registers.
The transfers are double-buffered to ensure that the integrity
of the data is maintained. Communication to the device is
accomplished through a fast (up to 400kHz), two-wire I2C serial
bus for easy connection to a microcontroller or embedded
controller.
The TCS3771 provides a separate pin for level-style interrupts.
When interrupts are enabled and a preset value is exceeded,
the interrupt pin is asserted and remains asserted until cleared
by the controlling firmware. The interrupt feature simplifies and
improves system efficiency by eliminating the need to poll a
sensor for a light intensity or proximity value. An interrupt is
generated when the value of an RGBC or proximity conversion
exceeds either an upper or lower threshold. In addition, a
programmable interrupt persistence feature allows the user to
determine how many consecutive exceeded thresholds are
necessary to trigger an interrupt. Interrupt thresholds and
persistence settings are configured independently for both
RGBC and proximity.
Proximity detection requires only a single external IR LED. An
internal LED driver can be configured to provide a constant
current sink of 12.5mA, 25mA, 50mA or 100mA of current. No
external current limiting resistor is required. The number of
proximity LED pulses can be programmed from 1 to 255 pulses.
Each pulse has a 14μs period. This LED current coupled with the
programmable number of pulses provides a 2000:1 contiguous
dynamic range.
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ams Datasheet, Confidential
[v1-20] 2014-Aug-06