ATA2516 Ver la hoja de datos (PDF) - Atmel Corporation

Número de pieza

componentes Descripción

Fabricante

ATA2516

IR Receiver ASIC

Atmel Corporation 

Features

• Supply Voltage: 4.5 V to 5.5 V

• Automatic Sensitivity Adaptation (AGC)

• Automatic Strong Signal Adaptation (ATC)

• Carrier Frequency is 56 kHz; Adjusted by Zener Diode Fusing ±4%

• TTL and CMOS Compatible

Applications

• All Kinds of IR Remote Control Systems

• Carrier Frequency Modulated Transmission Systems

IR Receiver

ASIC

Benefits

• No External Components Needed

• Enhanced Immunity Against Ambient Light Disturbances

ATA2516

Description

The IC ATA2516 is a complete IR receiver for data communication systems. The

device is developed and optimized for use in carrier frequency modulated transmis-

sion applications. Its function can be described using the block diagram in Figure 1 on

page 2. 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 application. After

amplification by a Controlled Gain Amplifier (CGA), the signals pass a tuned inte-

grated narrow bandpass filter with a center frequency f0 equivalent to the chosen

carrier frequency of the input signal. The demodulator is used to convert the input

burst signal to 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

changing environmental conditions (ambient light, modulated lamps etc.). A 7-bit digi-

tal-to-analog converter is used to adjust the gain of the controlled gain amplifier. Other

special features serve to adapt to the current application to secure best transmission

quality. The ATA2516 operates in a voltage supply range of 4.5 V - 5.5 V.

Rev. 4801B–AUTO–10/04

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