Details, datasheet, quote on part number: TDA7540B
PartTDA7540B
CategoryMultimedia => Audio => Receivers => AM/FM Receiver
DescriptionAM/FM Car Radio Tuner IC with Stereo Decoder and
Intelligent Selectivity System (ISS)
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 I2C-Bus controlled
Description
The TDA7540 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.
CompanyST Microelectronics, Inc.
DatasheetDownload TDA7540B datasheet
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Features, Applications
AM/FM Car Radio Tuner IC with Stereo Decoder and Intelligent Selectivity System (ISS)
Features

RF AGC generation by RF and IF detection I/Q mixer for IF 10.7MHz with image rejection Mixer for IF 450kHz Internal 450KHz bandpass filter with bandwidth control by ISS Fully integrated FM-demodulator with spike cancellation TQFP80

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 I2C-Bus controlled

Wide and narrow AGC generation Mixer for 10.7MHz, AM upconversion Mixer for 450kHz, AM downconversion Integrated AM-demodulator AM IF- and audio noise blanking

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

Description

The 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.

Part number TDA7540B Temp range, to 85 Package TQFP80 Packing Tube
1 2 Block diagram. 4 Pins description and connection diagrams. 5
2.3 TQFP80 pins connection diagram. 5 Pin description. 5 Thermal data. 7

Mixer1, AGC and 24 Mixer2, limiter and demodulator. 24 Quality detection and ISS. 24 Soft mute control. 25

Decoder. 26 Functional description of the noise blanker. 29 Functional description of the multipath-detector. 30 Quality detector. 31 AFS control and stereo decoder mute. 31

Contents Data transition. 34 Start condition. 34 Stop condition. 35 Acknowledge. 35 Data transfer. 35 Device addressing. 35 Write operation. 35 Read operation. 36

Appendix. 63 Part List (Application and measurment circuit). 70 Application circuit. 71 Application Notes. 72 Package Information. 73 Revision history. 74


 

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