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TEA6840

New In Car Entertainment (NICE) car radio

Philips Electronics 

Philips Semiconductors

New In Car Entertainment (NICE) car radio

Preliminary specification

TEA6840H

FEATURES

• FM mixer for conversion of FM RF from 65 to 108 MHz

to IF of 10.7 MHz; the mixer provides inherent image

rejection

• FM RF mixer can be set to receive weather band radio

up to 162.55 MHz; weather band radio flag output

• AM mixer 1 for conversion of AM RF to AM IF1

10.7 MHz

• LC tuner oscillator providing mixer frequencies for FM

mixer and AM mixer 1

• AM mixer 2 for conversion of AM IF1 to AM IF2 450 kHz

• Crystal oscillator providing mixer frequencies for AM

mixer 2 and reference for synthesizer PLL, IF count,

timing for Radio Data System (RDS) update and

reference frequency for car audio signal processor IC

• Fast synthesizer PLL tuning system with local control for

inaudible RDS updating

• Timing function for RDS update algorithm and control

signal output for car audio signal processor ICs

(TEA688x, SAA77xx)

• Digital alignment circuit for conversion of LC oscillator

tuning voltage to controlled alignment voltage of FM

antenna tank circuit

• AGC pin diode drive circuit for FM RF AGC; AGC

detection at FM mixer input; the AGC pin diode drive can

be activated by the I2C-bus as a local/distance function;

AGC threshold is a programmable and keyed function

switchable via the I2C-bus

• FM IF linear amplifiers with high dynamic input range

• FM quadrature demodulator with automatic centre

frequency adjustment and Total Harmonic Distortion

(THD) compensation

• Level detector for AM and FM with temperature

compensated output voltage; starting point and slope of

level output is programmable via the I2C-bus

• AM RF pin diode drive circuit; AGC threshold detection

at AM mixer 1 and IF2 AGC input; threshold is

programmable via the I2C-bus; AM IF2 AGC and

demodulator

• AM AF output switchable to provide AM IF2 for AM

stereo decoder

• AM noise blanker with blanking at AM IF2

• Several test modes available for fast IC and system

tests.

GENERAL DESCRIPTION

The TEA6840H is a single chip car radio tuner for AM and

FM intended for microcontroller tuning with the I2C-bus

providing the following functions:

• AM double conversion receiver for LW/MW/SW (31 m,

41 m and 49 m bands) with IF1 = 10.7 MHz and

IF2 = 450 kHz

• FM single conversion receiver with integrated image

rejection for IF = 10.7 MHz capable of selecting US FM,

US weather, Europe FM, East Europe FM and Japan

FM bands.

ORDERING INFORMATION

TYPE

NUMBER

TEA6840H

NAME

QFP64

PACKAGE

DESCRIPTION

plastic quad flat package; 64 leads (lead length 1.95 mm);

body 14 × 20 × 2.8 mm

VERSION

SOT319-2

1999 Jul 12

2

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