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