TEF6862

www.DataSheet4U.com TEF6862 Car Radio Enhanced Selectivity Tuner (CREST) Rev. 01 — 14 September 2006 Product data sheet 1. General description The TEF6862 is a single-chip car radio tuner for AM, FM and weather band reception providing AM double conversion for LW, MW and full range SW (11 m to 120 m bands) with IF1 = 10.7 MHz and IF2 = 450 kHz. FM double conversion to IF1 = 10.7 MHz and IF2 = 450 kHz with integrated image rejection for both IF1 and IF2; integrated IF filter with variable bandwidth and automatic bandwidth control algorithm with flexibility via the I2C-bus; capable of US FM, Europe FM, Japan FM, East Europe FM and weather band reception; all FM bands can be selected using high injection LO or low injection LO in the FM mixer 1. Tuning system including crystal oscillator, VCO, PLL synthesizer and state machine for timing uncritical control of search, preset change and AF check via microcontroller. 2. Features I High dynamic range FM front-end mixer for conversion of FM RF (65 MHz to 108 MHz and USA weather band) to an IF frequency of 10.7 MHz; mixer provides inherent image rejection which can be switched from low injection LO to high injection LO via the I2C-bus I FM front-end AGC PIN diode drive circuit; AGC detection at the FM font-end mixer input and the IF filter input; AGC threshold for detection at the mixer input is programmable and keyed AGC function can be selected via the I2C-bus; the AGC PIN diode drive can be activated by the I2C-bus for a search tun...