TDA7540N datasheet(1/76 Pages) STMICROELECTRONICS

部件名	TDA7540N

功能描述	AM/FM car radio tuner IC with stereo decoder and intelligent selectivity system (ISS)

PDF	76 Pages

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制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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1 / 76 page

November 2007

Rev 1

1/76

1

TDA7540N

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 I2C-Bus controlled

Description

The TDA7540N 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.

LQFP80

Table 1.

Device summary

Order code

Temp range,

°CPackage

Packing

TDA7540N

-40 to 85°C

LQFP80 (14x14x1.4mm)

Tube

TDA7540NTR

-40 to 85°C

LQFP80 (14x14x1.4mm)

Tape and reel

www.st.com

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