TEA6843 查看數據表（PDF） - Philips Electronics

零件编号

产品描述 (功能)

生产厂家

TEA6843

New In Car Entertainment (NICE) extended car radio

Philips Electronics 

Philips Semiconductors

New In Car Entertainment (NICE)

extended car radio

Product specification

TEA6843HL

1 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

• Buffer output for weather band flag

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

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 of

450 kHz

• Crystal oscillator providing mixer frequencies for

AM mixer 2 and reference for synthesizer PLL, IF count,

timing for inaudible Radio Data System (RDS) update

and reference frequency for car audio signal

processor ICs

• 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) or car radio integrated signal

processor IC (TEF689x)

• Digital auto 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 current

can be set to a fixed value to allow local function for

search tuning; 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 and level driven soft mute;

soft mute characteristic is adjustable via the I2C-bus

• 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.

2 GENERAL DESCRIPTION

The TEA6843HL is a single IC with car radio tuner for AM,

FM and Weather Band (WB) intended for microcontroller

tuning with the I2C-bus. It provides the following functions:

• AM double conversion receiver for LW, MW and 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

• The tuning system includes FM mixer, AM mixer 1,

AM mixer 2, crystal oscillator, VCO and PLL synthesizer

on one chip.

3 ORDERING INFORMATION

TYPE

NUMBER

TEA6843HL

NAME

LQFP80

PACKAGE

DESCRIPTION

plastic low profile quad flat package; 80 leads;

body 12 × 12 × 1.4 mm

VERSION

SOT315-1

2003 Dec 19

3

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