Datasheet > T2525_09

T2525_09

更新时间： 2024-09-25 07:04:07

品牌	Logo	应用领域
爱特美尔 - ATMEL		/
页数	文件大小	规格书
12页	216K
描述
IR Receiver ASSP

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中文翻译

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数据手册

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T2525_09 数据手册

Features

• No External Components Except PIN Diode

• Supply-voltage Range: 4.5V to 5.5V

• Highest Sensitivity Due to Automatic Sensitivity Adaption (AGC) and Automatic Strong

Signal Adaption (ATC)

• Highest Immunity Against Disturbances from Daylight and Lamps

• Available for Carrier Frequencies between 30 kHz to 76 kHz; Adjusted

by Zener Diode Fusing

• TTL and CMOS Compatible

IR Receiver

ASSP

• Suitable Minimum Burst Length ≥ 10 Pulses/Burst

Applications

• Home Entertainment Applications (Audio/Video)

• Home Appliances

T2525

• Remote Control Equipment

1. Description

The IC T2525 is a complete IR receiver for data communication that was developed

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

IC offers highest sensitivity as well as highest suppression of noise from daylight and

lamps. The T2525 is available with broadest range of carrier frequencies (30, 33, 36,

37, 38, 40, 44, 56, 76 kHz) and 5 different noise suppression regulation types (stan-

dard, lamp, noise, short burst, data rate) covering requirements of high-end remote

control solutions (please refer to selection guide available for T2525/ATA2526). The

T2525 operates in a supply voltage range of 4.5V to 5.5V.

The function of T2525 can be described using the block diagram (see Figure 1-1 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 applications. After

amplification by a Controlled Gain Amplifier (CGA), the signals have to pass a tuned

integrated narrow bandpass filter with a center frequency f₀which 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 infor-

mation 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 condition (ambient light, modulated lamps etc.).

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

transmission quality.

4657G–AUTO–09/09

12 3 4 5 6 7...12

中文翻译

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