TSOP5700 datasheet(5/19 Pages) VISHAY

Il numero della parte	TSOP5700

Spiegazioni elettronici	IR Receiver for High Data Rate PCM at 455 kHz

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Produttore elettronici	VISHAY [Vishay Siliconix]

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VISHAY

TSOP5700

Document Number 82166

Rev. 5, 14-Aug-03

Vishay Semiconductors

www.vishay.com

Recommendation for Suitable Data

Formats

The circuit of the TSOP5700 is designed in that way

that disturbance signals are identified and unwated

output pulses due to noise or disturbances are

avoided. A bandpass filter, an automatic gain control

and an integrator stage is used to suppress such dis-

turbances. The distinguishing marks between data

signal and disturbance are carrier frequency, burst

length and the envelope duty cycle.

The data signal should fulfill the following conditions:

• The carrier frequency should be close to 455 kHz.

• The burstlength should be at least 22

µs (10 cycles

of the carrier signal) and shorter than 500

µs.

• The separation time between two consecutive

bursts should be at least 26

µs.

• If the data bursts are longer than 500

µs then the

envelope duty cycle is limited to 25 %

• The duty cycle of the carrier signal (455 kHz) may be

between 50 % (1.1

µs pulses) and 10 % (0.2 µs

pulses). The lower duty cycle may help to save bat-

tery power.

TSOP5700 Scheda tecnica(PDF) 5 Page - Vishay Siliconix