ATA2526 ATMEL Corporation, ATA2526 Datasheet

ATA2526

Manufacturer Part Number

ATA2526

Description

Low-voltage IR Receiver ASSP

Manufacturer

ATMEL Corporation

Datasheet

1.ATA2526.pdf (14 pages)

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Features

•

Applications

•

1. Description

The IC ATA2526 is a complete IR receiver for data communication developed and

optimized for use in carrier-frequency-modulated transmission applications. The IC

combines small size with high sensitivity as well as high suppression of noise from

daylight and lamps. An innovative and patented pad layout offers unique flexibility for

assembly of IR receiver modules. The ATA2526 is available with standard frequencies

(33, 36, 37, 38, 40, 56 kHz) and 3 different noise suppression regulation types (stan-

dard, lamp, short burst) covering requirements of different high-volume remote control

solutions (please refer to selection guide available for ATA2525/ATA2526). The

ATA2526 operates in a supply voltage range of 2.7V to 5.5V.

The function of the ATA2526 can be described using the block diagram of

on page

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

chosen carrier frequency of the input signal The demodulator is used first 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 the present environmental conditions (ambient light, modulated lamps

etc.). Other special features are used to adapt to the current application to secure best

transmission quality.

No External Components Except PIN Diode

Supply-voltage Range: 2.7V to 5.5V

High Sensitivity Due to Automatic Sensitivity Adaption (AGC) and Automatic Strong

Signal Adaption (ATC)

Automatic Supply Voltage Adaptation

High Immunity against Disturbances from Daylight and Lamps

Small Size and Innovative Pad Layout

Available for Carrier Frequencies between 33 kHz to 40 kHz and 56 kHz; adjusted by

Zener-Diode Fusing ±2.5%

TTL and CMOS Compatible

Home Entertainment Applications

Home Appliances

Remote Control Equipment

2. The input stage meets two main functions. First it provides a suitable bias

which is equivalent to the

Figure 1-1

Low-voltage

IR Receiver

ASSP

ATA2526

4905D–AUTO–10/06

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