DESCRIPTION

The TDA 7511 is a high performance tuner circuit for AM/FM car radio. It contains mixers, IF amplifiers, demodulators for AM and FM, quality detection, ISS filter and PLL synthesizer with IF counter on a singlechip.

Use of BICMOS technology allows the implementation of several tuning functions and a minimum of external components.

FM-PART

■ RF AGC GENERATION BY RF AND IF DETECTION FOR PIN DIODES AND MOSFET(PRESTAGE)

■ 1ST MIXER FOR 1ST FM IF 10.7MHz WITH PROGRAMMABLE IF TANK ADJUST FOR FM AND AM UPCONVERSION

■ 2 PROGRAMMABLE IF-GAIN STAGES

■ 2ND MIXER FOR 2ND IF 450KHz

■ INTERNAL IF BANDPASS FILTER WITH THREE BANDWIDTHS CONTROLLED BY ISS (INCLUDING WEATHER BAND)

■ FULLY INTEGRATED FM-DEMODULATOR

AM-PART

■ WIDE AND NARROW AGC GENERATION

■ PREAMPLIFIER AND MIXER FOR 1ST IF 10.7MHZ, AM UPCONVERSION

■ 2ND MIXER FOR 2ND IF 450KHZ

■ INTEGRATED AM-DEMODULATOR

■ OUTPUT FOR AM-STEREO-DECODER

ADDITIONAL FEATURES

■ HIGH PERFORMANCE FAST PLL FOR RDS SYSTEM

■ IF COUNTER FOR FM AND AM UPCONVERSION WITH SEARCH STOP SIGNAL

■ QUALITY DETECTOR FOR LEVEL, DEVIATION, ADJACENT CHANNEL AND MULTIPATH

■ QUALITY DETECTION INFORMATIONS AS ANALOG SIGNALS EXTERNAL AVAILABLE

■ ISS (INTELLIGENT SELECTIVITY SYSTEM) FOR CANCELLATION OF ADJACENT CHANNEL AND NOISE INFLUENCES

■ ADJACENT CHANNEL MUTE

■ FULLY ELECTRONIC ALIGNMENT

■ ALL FUNCTIONS I2C-BUS CONTROLLED

■ ISS FILTER STATUS INFORMATION I2C-BUS READABLE