TEF6721HL

TEF6721HL Car radio tuner front-end for digital IF Rev. 04 — 20 December 2005 Product data sheet 1. General description The TEF6721HL is a single chip car radio tuner for AM, FM standard, FM In-Band On-Channel Digital Audio Broadcast (IBOC DAB) and weather band providing combined AM and FM gain controlled differential Intermediate Frequency (IF) output for the SAF7730H including the following functions: AM up-conversion tuner to an IF frequency of 10.7 MHz for Long Wave (LW)/Medium Wave (MW)/Short Wave (SW) (31 m, 41 m and 49 m bands) FM single conversion tuner to an IF frequency of 10.7 MHz with integrated image rejection for US FM, Europe FM, Japan FM, East Europe FM and weather band reception; all bands can be selected using high side or low side Local Oscillator (LO) injection Tuning system includes Voltage-Controlled Oscillator (VCO), crystal oscillator and Phase-Locked Loop (PLL) synthesizer on one chip. 2. Features s FM mixer for conversion of FM Radio Frequency (RF) (64 MHz to 108 MHz and US weather band) to an IF of 10.7 MHz; the mixer provides inherent image rejection and can be switched from low injection to high injection Local Oscillator (LO) via the I2C-bus; two different mixer conversion gains can be selected via the I2C-bus s Automatic Gain Control (AGC) PIN diode drive circuit for FM RF AGC; AGC detection at FM mixer input and IF AGC amplifier input; AGC threshold for detection at FM mixer input is a programmable and keyed function switchable via the I...