U2538B-MFPG3Y
U2538B-MFPG3Y Datasheet
The IC U2538B is a complete IR receiver for data communication. The useful input signals are separated by a special input circuit and amplified by a gain-controlled amplifier. The bandpass filter suppresses the off-band signals. The signal detector, consisting of a demodulator, an integrator and a Schmitt trigger, forms the input signal to an output pulse that can be interfaced to a microcomputer. The AGC and the ATC circuit control the receiver's sensitivity, making it insensitive to ambient light sources.
| Part | Datasheet |
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U2538B-MFPG3Y |
U2538B-MFPG3Y (pdf) |
| Related Parts | Information |
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U2538B-MFPY |
U2538B-MFPY |
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| • Few External Components • Low Power Consumption • Microcomputer Compatible • Insensitive to Ambient Light and Other Continuous Interferences • Keyless Entry Systems • Remote Control • Wireless Data Transfer up to 4 kbit/s IR Receiver for Data Communication The IC U2538B is a complete IR receiver for data communication. The useful input signals are separated by a special input circuit and amplified by a gain-controlled amplifier. The bandpass filter suppresses the off-band signals. The signal detector, consisting of a demodulator, an integrator and a Schmitt trigger, forms the input signal to an output pulse that can be interfaced to a microcomputer. The AGC and the ATC circuit control the receiver's sensitivity, making it insensitive to ambient light sources. Figure Block Diagram with Typical Circuit U2538B U2538B Input Amplifier and filter Detector Modulated IR signal carrier frequency 20 to 60 kHz minimum 6 pulses/burst AGC/ATC Figure Block Diagram RF0 RF BIAS AGND CAGC CAGC + Comp 1 - + - Comp 2 DGND TIA CGA BPF AGC Transimpedance amplifier Controlled gain amplifier Bandpass filter Automatic gain control ATC DEM INT ST Automatic threshold control Demodulator Integrator Schmitt trigger 2 U2538B Pin Configuration Figure Pinning SO8 RF AGND U2538B CAGC OUT DGND Table Pin 1 2 3 4 5 6 7 8 Pin Description Symbol Function Supply voltage CAGC AGC capacitor Data output DGND GND - DEM/INT/ST Input pin diode AGND GND amplifier Frequency determination Ordering Information Extended Type Number U2538B-MFPY U2538B-MFPG3Y Package Information Package SO8 Remarks Tube, Pb-free Taped and reeled, Pb-free Package SO8 Dimensions in mm technical drawings according to DIN specifications History 4717B-IRRC-09/05 • Put datasheet in a new template • Pb-free Logo on page 1 added • Heading Rows on Table “Absolute Maximum Ratings” on page 6 added • Ordering Information on page 8 changed 8 U2538B Atmel Corporation 2325 Orchard Parkway San Jose, CA 95131, USA Tel 1 408 441-0311 Fax 1 408 487-2600 Regional Headquarters Europe Atmel Sarl Route des Arsenaux 41 Case Postale 80 CH-1705 Fribourg Switzerland Tel 41 26-426-5555 Fax 41 26-426-5500 Asia Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimshatsui East Kowloon Hong Kong Tel 852 2721-9778 Fax 852 2722-1369 Japan 9F, Tonetsu Shinkawa Bldg. 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan Tel 81 3-3523-3551 Fax 81 3-3523-7581 Atmel Operations Memory 2325 Orchard Parkway San Jose, CA 95131, USA Tel 1 408 441-0311 Fax 1 408 436-4314 Microcontrollers 2325 Orchard Parkway San Jose, CA 95131, USA Tel 1 408 441-0311 Fax 1 408 436-4314 La Chantrerie BP 70602 44306 Nantes Cedex 3, France Tel 33 2-40-18-18-18 Fax 33 2-40-18-19-60 ASIC/ASSP/Smart Cards Zone Industrielle 13106 Rousset Cedex, France Tel 33 4-42-53-60-00 Fax 33 4-42-53-60-01 1150 East Cheyenne Mtn. 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