Philips Semiconductors
Product specification
New In Car Entertainment car radio tuner IC with
Precision Adjacent Channel Suppression (NICE-PACS)
CONTENTS
1
2
3
4
5
6
7
7.1
7.1.1
7.1.2
7.1.3
7.2
7.3
7.3.1
7.3.2
7.3.3
7.3.4
7.3.5
7.3.6
7.3.7
7.3.8
7.3.9
7.3.10
7.4
7.4.1
7.4.2
7.4.3
7.4.4
7.5
7.6
7.7
8
9
10
11
FEATURES
GENERAL DESCRIPTION
ORDERING INFORMATION
QUICK REFERENCE DATA
BLOCK DIAGRAM
PINNING
FUNCTIONAL DESCRIPTION
Oscillators
VCO
PLL
Crystal oscillator
DAA
FM signal channel
FM mixer 1
Buffer output for weather band flag
(pin WBFLAG)
FM keyed AGC
FM IF amplifier
FM mixer 2
FM IF2 dynamic selectivity
FM quadrature demodulator
Adjacent channel detector and threshold
extension
Bandwidth control ‘active’ flag (pin IFBWFLAG)
Bandwidth control monitor voltage (pin V
IFBW
)
AM signal channel
AM tuner including mixer 1 and mixer 2
AM RF AGC
AM detector
AM noise blanker
FM and AM level detector
IF2 filter gain alignment
Frequency offset detector/alignment
LIMITING VALUES
THERMAL CHARACTERISTICS
DC CHARACTERISTICS
AC CHARACTERISTICS
12
12.1
12.1.1
12.1.2
12.1.3
12.1.4
12.1.5
12.2
12.2.1
12.2.2
12.2.3
12.2.4
12.2.5
12.2.6
12.2.7
12.2.8
12.2.9
12.2.10
13
14
15
16
16.1
16.2
16.3
16.4
16.5
17
18
19
20
I
2
C-BUS PROTOCOL
TEA6848H
I
2
C-bus specification
Data transfer
I
2
C-bus pull-up resistors
Frequency setting
Default settings
Timing requirements
I
2
C-bus protocol
Data transfer mode and IC address
Write mode: data byte 0
Write mode: data byte 1
Write mode: data byte 2
Write mode: data byte 3
Write mode: data byte 4
Write mode: data byte 5
Write mode: data byte 6
Write mode: data byte 7
Read mode: data byte 0
TEST AND APPLICATION INFORMATION
INTERNAL CIRCUITRY
PACKAGE OUTLINE
SOLDERING
Introduction to soldering surface mount
packages
Reflow soldering
Wave soldering
Manual soldering
Suitability of surface mount IC packages for
wave and reflow soldering methods
DATA SHEET STATUS
DEFINITIONS
DISCLAIMERS
PURCHASE OF PHILIPS I
2
C COMPONENTS
2004 Nov 12
2
Philips Semiconductors
Product specification
New In Car Entertainment car radio tuner IC with
Precision Adjacent Channel Suppression (NICE-PACS)
1
FEATURES
TEA6848H
•
FM mixer 1 for conversion of FM RF (65 to 108 MHz
and US weather band) to IF of 10.7 MHz; the mixer
provides inherent image rejection; for European and
US FM band/WB (weather band) the mixer is driven with
a ‘high’ injection Local Oscillator (LO); in Japan
FM band and East Europe FM band the mixer is driven
with a ‘low’ injection LO
•
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 FM mixer 2 and reference for
synthesizer PLL, IF count, timing for 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, TEF689x)
•
Digital alignment circuit for bus controlled matching of
oscillator tuning voltage to FM antenna tank circuit
tuning voltage
•
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 I
2
C-bus as a local function for
search tuning; AGC threshold is a programmable and
keyed function switchable via the I
2
C-bus
•
FM IF linear amplifier with high dynamic input range
•
FM mixer 2 for conversion of FM IF1 to FM IF2 of
450 kHz with inherent image rejection
•
Fully integrated dynamic selectivity and
FM demodulator at IF2; improved sensitivity with
dynamic threshold extension; centre frequency of IF2
selectivity alignment via the I
2
C-bus
•
Level detector for AM and FM with temperature
compensated output voltage; starting point and slope of
level output is programmable via the I
2
C-bus
3
ORDERING INFORMATION
TYPE NUMBER
TEA6848H
2004 Nov 12
•
AM cascode AGC stage and RF PIN diode drive circuit;
AGC threshold detection at AM mixer 1 and IF2 AGC
input; threshold for detection at mixer 1 input is
programmable via the I
2
C-bus
•
AM IF2 AGC and demodulator
•
AM AF output switchable to provide AM IF2 for
AM stereo decoder
•
AM noise blanker with detection at IF1 and blanking at
AM IF2
•
Software controlled flag output
•
Buffer output for weather band flag
•
Adjacent channel detector, modulation detector and
frequency offset for instantaneous bandwidth control of
the integrated filter
•
Flag and voltage output indicating the actual bandwidth
•
I
2
C-bus alignment of centre frequency and gain variation
as functions of bandwidth of the IF2 filter and centre
frequency of the offset detector.
2
GENERAL DESCRIPTION
The TEA6848H is a single IC with car radio tuner for AM,
FM and Weather Band (WB) intended for microcontroller
tuning with the I
2
C-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 double conversion receiver with integrated image
rejection for IF1 and for IF2 capable of selecting US FM,
US weather, Europe FM, East Europe FM and
Japan FM bands; fully integrated dynamic selectivity at
450 kHz FM IF2; FM demodulator with dynamic
threshold extension; centre frequency alignment of IF2
selectivity via the I
2
C-bus
•
The tuning system includes VCO, crystal oscillator and
PLL synthesizer on one chip.
PACKAGE
NAME
LQFP80
DESCRIPTION
plastic low profile quad flat package; 80 leads; body 12
×
12
×
1.4 mm
3
VERSION
SOT315-1
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