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TEA6843 Datenblatt(PDF) 3 Page - NXP Semiconductors |
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TEA6843 Datenblatt(HTML) 3 Page - NXP Semiconductors |
3 / 62 page 2003 Dec 19 3 Philips Semiconductors Product specification New In Car Entertainment (NICE) extended car radio TEA6843HL 1 FEATURES • FM mixer for conversion of FM RF from 65 to 108 MHz to IF of 10.7 MHz; the mixer provides inherent image rejection • FM RF mixer can be set to receive weather band radio up to 162.55 MHz • Buffer output for weather band flag • AM mixer 1 for conversion of AM RF to AM IF1 of 10.7 MHz • LC tuner oscillator providing mixer frequencies for FM mixer and AM mixer 1 • AM mixer 2 for conversion of AM IF1 to AM IF2 of 450 kHz • Crystal oscillator providing mixer frequencies for AM mixer 2 and reference for synthesizer PLL, IF count, timing for inaudible Radio Data System (RDS) update and reference frequency for car audio signal processor ICs • Fast synthesizer PLL tuning system with local control for inaudible RDS updating • Timing function for RDS update algorithm and control signal output for car audio signal processor ICs (TEA688x, SAA77xx) or car radio integrated signal processor IC (TEF689x) • Digital auto alignment circuit for conversion of LC oscillator tuning voltage to controlled alignment voltage of FM antenna tank circuit • AGC PIN diode drive circuit for FM RF AGC; AGC detection at FM mixer input; the AGC PIN diode current can be set to a fixed value to allow local function for search tuning; AGC threshold is a programmable and keyed function switchable via the I2C-bus • FM IF linear amplifiers with high dynamic input range • FM quadrature demodulator with automatic centre frequency adjustment and Total Harmonic Distortion (THD) compensation and level driven soft mute; soft mute characteristic is adjustable via the I2C-bus • Level detector for AM and FM with temperature compensated output voltage; starting point and slope of level output is programmable via the I2C-bus • AM RF PIN diode drive circuit; AGC threshold detection at AM mixer 1 and IF2 AGC input; threshold is programmable via the I2C-bus; AM IF2 AGC and demodulator • AM AF output switchable to provide AM IF2 for AM stereo decoder • AM noise blanker with blanking at AM IF2 • Several test modes available for fast IC and system tests. 2 GENERAL DESCRIPTION The TEA6843HL is a single IC with car radio tuner for AM, FM and Weather Band (WB) intended for microcontroller tuning with the I2C-bus. It provides the following functions: • AM double conversion receiver for LW, MW and SW (31 m, 41 m and 49 m bands) with IF1 = 10.7 MHz and IF2 = 450 kHz • FM single conversion receiver with integrated image rejection for IF = 10.7 MHz capable of selecting US FM, US weather, Europe FM, East Europe FM and Japan FM bands • The tuning system includes FM mixer, AM mixer 1, AM mixer 2, crystal oscillator, VCO and PLL synthesizer on one chip. 3 ORDERING INFORMATION TYPE NUMBER PACKAGE NAME DESCRIPTION VERSION TEA6843HL LQFP80 plastic low profile quad flat package; 80 leads; body 12 × 12 × 1.4 mm SOT315-1 |
Ähnliche Teilenummer - TEA6843 |
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Ähnliche Beschreibung - TEA6843 |
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