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September 2013 Rev 2 1/75
75
TDA7540B
AM/FM Car Radio Tuner IC with Stereo Decoder and
Intelligent Selectivity System (ISS)
Features
FM-Part
■ RF AGC generation by RF and IF detection
■ I/Q mixer for 1st FM IF 10.7MHz with image
rejection
■ Mixer for 2nd IF 450kHz
■ Internal 450KHz bandpass filter with bandwidth
control by ISS
■ Fully integrated FM-demodulator with spike
cancellation
AM-Part
■ Wide and narrow AGC generation
■ Mixer for 1st IF 10.7MHz, AM upconversion
■ Mixer for 2nd IF 450kHz, AM downconversion
■ Integrated AM-demodulator
■ AM IF- and audio noise blanking
Stereodecoder
■ PLL with adjustment free, fully integrated VCO
■ Automatic pilot dependent MONO/STEREO
switching
■ Programmable ROLL-OFF compensation
■ High cut and stereo blend-characteristics
programmable
■ Dedicated RDS-mute
■ Internal noise blanker with several threshold
controls
Additional Features
■ VCO for world tuning range
■ High performance fast PLL for RDS-System
■ IF counter for FM and AM with search stop
signal
■ Quality detector for level, deviation, adjacent
channel and multipath
■ ISS (Intelligent Selectivity System) for
cancellation of adjacent channel and noise
influences
■ Adjacent channel mute
■ Fully electronic alignment
■ All functions I
2
C-Bus controlled
Description
The TDA7540B is a high performance tuner
circuit for AM/FM car radio. It contains mixer, IF
amplifier, demodulator for AM and FM,
stereodecoder, quality detection, ISS filter and
PLL synthesizer with IF counter on a single chip.
Use of BICMOS technology allows the
implementation of several tuning functions and a
minimum of external components.
Order codes
TQFP80
Part number Temp range, CPackage Packing
TDA7540B -40 to 85 TQFP80 Tray
TDA7540BTR -40 to 85 TQFP80 Tape & reel
www.st.com
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