TDA7541B Datasheet, PDF (1/77 Pages) STMicroelectronics – AM/FM car radio tuner IC with stereo decoder and intelligent selectivity system

TDA7541B
AM/FM car radio tuner IC with stereo decoder
and intelligent selectivity system
Features
■ FM part
– AGC generation by RF and IF detection
– I/Q mixer for 1^st IF 10.7 MHz with image
rejection
– Mixer for 2^nd IF 450 kHz
– Internal 450 kHz band pass filter with
bandwidth control by ISS
– Fully integrated FM demodulator with noise
cancellation
■ AM part
– Wide and narrow AGC generation
– Mixer for 1^st IF 10.7 MHz, AM up
conversion
– Mixer for 2^nd IF 450 kHz
– Integrated AM-demodulator
– AM IF noise blanking
■ Stereo decoder
– 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
– Audio noise blanker
■ Additional features
– VCO for world tuning range
LQFP64
– 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
– Independent weather band input
– All functions I²C bus controlled
Description
The TDA7541B is a high performance tuner
circuit with stereo decoder for AM/FM car radio. It
contains a mixer, IF amplifier, demodulator for AM
and FM, stereo decoder, 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.
Table 1. Device summary
Order code
TDA7541B
TDA7541BTR
TDA7541BW
TDA7541BWTR
Package
LQFP64 (10 x 10 x 1.4 mm)
LQFP64 (10 x 10 x 1.4 mm)
LQFP64 (14 x 14 x 1.4 mm)
LQFP64 (14 x 14 x 1.4 mm)
Packing
Tray
Tape and reel
Tray
Tape and reel
July 2009
Doc ID 16048 Rev 1
1/77
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