TEF6730_1| Datasheet

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TEF6730
Front-end for digital-IF car radio
Rev. 01 -- 10 July 2006 Product data sheet

1. General description
The TEF6730 is a car radio tuner front-end for digital-IF reception, especially designed for co-operation with digital-IF DSP back-ends of the SAF773x and SAF778x families. The FM tuner features single conversion to IF = 10.7 MHz and integrated image rejection; capable for FM 65 MHz to 108 MHz and weather band reception. The AM tuner features single conversion to IF = 10.7 MHz with an integrated AM front-end, capable for LW, MW and full SW reception. A combined AM/FM IF AGC amplifier provides a suitable IF signal to the ADC in IF DSP. The device can be controlled via the fast-mode I2C-bus (400 kHz) and includes autonomous tuning functions for easy control. No manual alignments are required.

2. Features
I FM mixer for conversion of FM RF to IF 10.7 MHz with large dynamic range, high image rejection and selectable mixer gain I Selectable high or low injection of LO I AGC PIN diode drive circuit for FM RF AGC with detection at RF and IF, including keyed AGC function I RF input for weather band applications I Integrated AM front-end LNA I Integrated AM RF AGC for low desensitization and AGC PIN diode drive circuit with detection at RF and IF I AM mixer for conversion of AM RF to IF 10.7 MHz I AM/FM IF AGC amplifier with large dynamic range, gain controlled from IF DSP I AM and FM front-end AGC information is available via the I2C-bus I Low phase noise local oscillator with reliable start-up behavior I In-lock detection for optimized adaptive PLL tuning speed I Programmable divider and mixer dividers for reception of FM (65 MHz to 108 MHz), weather band, AM LW, MW and full SW I Two antenna DAAs I Sequential state machine supporting all tuning actions including AFU for RDS I Interfacing signals for IF AGC, FM ke
yed AGC, AFU and reference frequency to IF DSP for optimum system performance I Software controlled flag outputs I Selection of four I2C-bus addresses