TCS37717FN Datasheet, PDF (19/48 Pages) List of Unclassifed Manufacturers – The benefits and features of the TCS3771 are listed below

TCS3771 − Principles of Operation
The LED drive current is controlled by a regulated current sink
on the LDR pin. This feature eliminates the need to use a current
limiting resistor to control LED current. The LED drive current
can be configured for 12.5mA, 25mA, 50mA, or 100mA. For
higher LED drive requirements, an external P-FET transistor can
be used to control the LED current.
The number of LED pulses can be programmed to any value
between 1 and 255 pulses as needed. Increasing the number of
LED pulses at a given current will increase the sensor sensitivity.
Sensitivity grows by the square root of the number of pulses.
Each pulse has a 14μs period.
Figure 23:
Proximity IR LED Waveform
The proximity integration time (PTIME) is the period of time that
the internal ADC converts the analog signal to a digital count.
It is recommend that this be set to a minimum of PTIME = 0xFF
or 2.4ms.
ams Datasheet, Confidential
[v1-20] 2014-Aug-06
Page 19
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