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T2525N038-6AQ

Description
IC RECEIVER IR 5V 38KHZ 8-TSSOP
Categorysemiconductor    Analog mixed-signal IC   
File Size220KB,10 Pages
ManufacturerMicrochip
Websitehttps://www.microchip.com
Download Datasheet Parametric View All

T2525N038-6AQ Overview

IC RECEIVER IR 5V 38KHZ 8-TSSOP

T2525N038-6AQ Parametric

Parameter NameAttribute value
typereceiver
protocol-
Number of drivers/receivers0/1
duplex-
data rate-
Voltage - Power4.5 V ~ 5.5 V
Operating temperature-25°C ~ 85°C
Installation typesurface mount
Package/casing8-TSSOP, 8-MSOP (0.118", 3.00mm wide)
Supplier device packaging8-TSSOP
Features
No External Components Except PIN Diode
Supply-voltage Range: 4.5 V to 5.5 V
Automatic Sensitivity Adaptation (AGC)
Automatic Strong Signal Adaptation (ATC)
Enhanced Immunity Against Ambient Light Disturbances
Available for Carrier Frequencies between 30 kHz to 76 kHz; Adjusted by Zener Diode
Fusing
TTL and CMOS Compatible
Suitable Minimum Burst Length
³
6 or 10 Pulses/Burst
Applications
Audio Video Applications
Home Appliances
Remote Control Equipment
IR Receiver
ASSP
T2525
Description
The IC T2525 is a complete IR receiver for data communication developed and opti-
mized for use in carrier-frequency-modulated transmission applications. Its function
can be described using the block diagram (see Figure 1). The input stage meets two
main functions. First, it provides a suitable bias voltage for the PIN diode. Secondly,
the pulsed photo-current signals are transformed into a voltage by a special circuit
which is optimized for low-noise applications. After amplification by a
Controlled Gain
Amplifier
(CGA), the signals have to pass a tuned integrated narrow bandpass filter
with a center frequency f
0
which is equivalent to the chosen carrier frequency of the
input signal. The demodulator is used to convert the input burst signal into a digital
envelope output pulse and to evaluate the signal information quality, i.e., unwanted
pulses will be suppressed at the output pin. All this is done by means of an integrated
dynamic feedback circuit which varies the gain as a function of the present environ-
mental condition (ambient light, modulated lamps etc.). Other special features are
used to adapt to the current application to secure best transmission quality. The
T2525 operates in a supply-voltage range of 4.5 V to 5.5 V.
Figure 1.
Block Diagram
VS
IN
Input
CGA and
filter
Demodulator
OUT
Micro-
controller
Oscillator
Carrier frequency f
0
AGC/ATC and digital
control
Modulated IR signal
min 6/10 pulses
GND
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