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TSH512CFT Scheda tecnica(PDF) 1 Page - STMicroelectronics |
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1 / 19 page 1/19 TSH512 HiFi stereo/mono infrared transmitter Stereo sub-carrier generator s Supply voltage: 2.3V to 5.5V s Carriers frequency range: 0.4 to 11 MHz s High versatility: I/O pins for each section s Two FM transmitters for stereo s Sinusoidal carriers for high spectral purity s Micro or line level preamplifiers with ALC s VOX function to save on battery power s Transmitter 2 Standby for mono operation DESCRIPTION The TSH512 is a 0.4 to 11 MHz dual FM transmit- ter. Access pins to each section give a high versa- tility and allow several applications: stereo head- phone, multimedia headset, audio sub-carrier generator. The TSH512 integrates in one chip: Low-noise audio preamplifiers with ALC (Automat- ic Level Control), frequency modulated oscillators, and linear output buffers to drive external transis- tors. The sinusoidal carriers facilitates the filtering and allows high performance audio transmission. The VOX (Voice Operated Transmit) circuitry dis- ables the output buffer when there is no audio to save battery power. For MONO applications, the STAND-BY pin en- ables one transmitter only, reducing the supply current. The TSH512 forms a chipset with the dual receiv- er TSH511. APPLICATIONS s Infrared HiFi stereo transmitter s Infrared Headsets s Stereo sub-carrier for video transmitters s Voice operated wireless webcams s FM IF transmit systems ORDER CODE PACKAGE PIN CONNECTION (top view) Part Number Temperature Range Package Conditionning Marking TSH512CF -40°C to +85°C TQFP44 Tray TSH512C TSH512CFT -40°C to +85°C TQFP44 Tape & reel TSH512C F TQFP44 10 x 10 mm 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 1 + - + - TSH512 Monostable ALC ALC VCO VCO Output buffer Output buffer TX1 TX2 LNA LNA VOX + - PEA PEA 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 1 + - + - + - + - TSH512 Monostable ALC ALC VCO VCO Output buffer Output buffer TX1 TX2 LNA LNA VOX + - + - PEA PEA TSH512 HiFi stereo/mono infrared transmitter Stereo sub-carrier generator December 2002 |
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