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TEA6843 Datenblatt(PDF) 3 Page - NXP Semiconductors

Teilenummer TEA6843
Bauteilbeschribung  New In Car Entertainment (NICE) extended car radio
Download  62 Pages
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Hersteller  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

TEA6843 Datenblatt(HTML) 3 Page - NXP Semiconductors

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2003 Dec 19
3
Philips Semiconductors
Product specification
New In Car Entertainment (NICE)
extended car radio
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
PACKAGE
NAME
DESCRIPTION
VERSION
TEA6843HL
LQFP80
plastic low profile quad flat package; 80 leads;
body 12
× 12 × 1.4 mm
SOT315-1


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