Datasheet > VSOP98260

VSOP98260

更新时间： 2024-02-27 07:24:46

品牌	Logo	应用领域
威世 - VISHAY		/
页数	文件大小	规格书
3页	84K
描述
VSOP98260 for IR Code Learning Applications

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中文翻译

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数据手册

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VSOP98260 数据手册

VISHAY SEMICONDUCTORS

www.vishay.com

Infrared Remote Control Receivers

Application Note

VSOP98260 for IR Code Learning Applications

FEATURES

• Supply voltage: 2.0 V to 3.6 V

• Supply current: 0.6 mA to 0.9 mA

• Carrier-out-function: carrier frequency from 20 kHz to

60 kHz and burst length accurately correspond to the

input signal

• Small outline package 2 mm x 2 mm DFN-8 package

• Can be used with either a pvhotodiode or an IR emitter

used as a detector

ESD

• AC coupled input is insensitive to DC photocurrents

• To maximize the sensitivity, the TIA input pin has only

HBM class 1B ESD protection! Care should be taken

never to touch or otherwise expose this pin to an adverse

ESD source.

There is a wide interest in universal remote controls, which can be used to diminish the “clutter” of remote controls typically

present in a modern living room setting. Training the universal remote to send the correct code to each of possibly many

appliances in any media setting is not a simple task. Usually, the manufacturer of the universal remote control owns a database

of literally thousands of brand-model combinations, and the corresponding remote control code base for each model. The

universal remote must know the modulation frequency and pulse patterns represented in the code base in order to correctly

transmit a valid command to the appliance via a key press. Training the universal remote requires the user to identify his

appliances in the data base, and then by some means load the universal remote with the correct code base for each appliance.

While some users may have little difficulty with this set-up routine, others may be challenged. Also, even the largest data bases

inevitably lack some models present in the field, the number of which is mind boggling. There exists therefore a need for

universal remotes to learn their codes directly from the user. Assuming the precondition that the user still possesses the original

remote controls for his appliances, these remotes can be used as a “teacher” for a code learning circuit on the universal remote.

The process is simple. An application program guides the user to position his appliance remote near an infrared sensitive

component on the universal remote, and then asks the user to press a specific key. This causes the appliance remote to transmit

an infrared code, which is received in the universal remote and stored in memory. The universal remote now knows it must also

transmit this exact same code when the corresponding command is requested (e.g. “1”, “2”, … “channel up”, “volume up” etc.).

This process is repeated for each key which must be learned.

Infrared remote controls transmit their signals via an infrared LED. The simplest and least expensive code learning technique

devised to date uses this same infrared LED as both the code transmitter and the code detector for receiving signals from the

appliance remote. IR LEDs are not very efficient detectors. Fortunately, for code learning we want to use an inefficient detector

to eliminate any spurious signals present in the room. The much stronger signal from the appliance remote, which is held close

to the detector, will be enough to capture a clean signal.

Revision: 19-Jul-12

Document Number: 82588

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000

12 3

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VSOR1601103FT1	VISHAY	获取价格	Molded, 25 or 50 Mil Pitch, Dual-In-Line Resistor Networks
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