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TEA6848HPHILPSN/a52avaiNew In Car Entertainment car radio tuner IC with Precision Adjacent Channel Suppression


TEA6848H ,New In Car Entertainment car radio tuner IC with Precision Adjacent Channel SuppressionTHERMAL CHARACTERISTICS10 DC CHARACTERISTICS11 AC CHARACTERISTICS2004 Nov 12 2Philips Semiconductor ..
TEA6848H/V1/S1 ,TEA6848H; New In Car Entertainment car radio tuner IC with Precision Adjacent Channel Suppression (NICE-PACS)
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TL3474CDR ,Quad, High Slew Rate, Single-Supply, Op Ampmaximum ratings over operating free-air temperature range (unless otherwise noted)Supply voltage: V ..
TL3474CN ,Quad, High Slew Rate, Single-Supply, Op Ampmaximum ratings” may cause permanent damage to the device. These are stress ratings only, andfuncti ..
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TL3474IDG4 , HIGH-SLEW-RATE,SINGLE-SUPPLY OPERATIONAL AMPLIFIERS
TL3474IDR ,Quad, High Slew Rate, Single-Supply, Op Ampmaximum ratings over operating free-air temperature range (unless otherwise noted)Supply voltage: V ..


TEA6848H
New In Car Entertainment car radio tuner IC with Precision Adjacent Channel Suppression

Philips Semiconductors Product specification
New In Car Entertainment car radio tuner IC with
Precision Adjacent Channel Suppression (NICE-P ACS) TEA6848H
CONTENTS
FEATURES GENERAL DESCRIPTION ORDERING INFORMATION QUICK REFERENCE DATA BLOCK DIAGRAM PINNING FUNCTIONAL DESCRIPTION
7.1 Oscillators
7.1.1 VCO
7.1.2 PLL
7.1.3 Crystal oscillator
7.2 DAA
7.3 FM signal channel
7.3.1 FM mixer1
7.3.2 Buffer output for weather band flag
(pin WBFLAG)
7.3.3 FM keyed AGC
7.3.4 FM IF amplifier
7.3.5 FM mixer2
7.3.6 FM IF2 dynamic selectivity
7.3.7 FM quadrature demodulator
7.3.8 Adjacent channel detector and threshold
extension
7.3.9 Bandwidth control ‘active’ flag (pin IFBWFLAG)
7.3.10 Bandwidth control monitor voltage (pin VIFBW)
7.4 AM signal channel
7.4.1 AM tuner including mixer 1 and mixer2
7.4.2 AM RF AGC
7.4.3 AM detector
7.4.4 AM noise blanker
7.5 FM and AM level detector
7.6 IF2 filter gain alignment
7.7 Frequency offset detector/alignment LIMITING VALUES THERMAL CHARACTERISTICS DC CHARACTERISTICS AC CHARACTERISTICS I2 C-BUS PROTOCOL
12.1 I2 C-bus specification
12.1.1 Data transfer
12.1.2 I2 C-bus pull-up resistors
12.1.3 Frequency setting
12.1.4 Default settings
12.1.5 Timing requirements
12.2 I2 C-bus protocol
12.2.1 Data transfer mode and IC address
12.2.2 Write mode: data byte0
12.2.3 Write mode: data byte1
12.2.4 Write mode: data byte2
12.2.5 Write mode: data byte3
12.2.6 Write mode: data byte4
12.2.7 Write mode: data byte5
12.2.8 Write mode: data byte6
12.2.9 Write mode: data byte7
12.2.10 Read mode: data byte0 TEST AND APPLICATION INFORMATION INTERNAL CIRCUITRY PACKAGE OUTLINE SOLDERING
16.1 Introduction to soldering surface mount
packages
16.2 Reflow soldering
16.3 Wave soldering
16.4 Manual soldering
16.5 Suitability of surface mount IC packages for
wave and reflow soldering methods DATA SHEET STATUS DEFINITIONS DISCLAIMERS PURCHASE OF PHILIPS I2 C COMPONENTS
Philips Semiconductors Product specification
New In Car Entertainment car radio tuner IC with
Precision Adjacent Channel Suppression (NICE-P ACS) TEA6848H FEATURES FM mixer 1 for conversion of FM RF (65to 108 MHz
and US weather band) to IF of 10.7 MHz; the mixer
provides inherent image rejection; for European and FM band/WB (weather band) the mixeris drivenwith
a ‘high’ injection Local Oscillator (LO); in Japan band and East Europe FM band the mixeris 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 mixer and AM mixer1 AM mixer 2 for conversion of AM IF1 to AM IF2 of
450 kHz Crystal oscillator providing mixer frequencies for mixer 2 and FM mixer 2 and reference for
synthesizerPLL,IF count, timingfor Radio Data System
(RDS) update and reference frequency for car audio
signal processor ICs Fast synthesizer PLLtuning system with local controlfor
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 I2 C-bus as a local function for
search tuning; AGC threshold is a programmable and
keyed function switchable via the I2 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 demodulator at IF2; improved sensitivity with
dynamic threshold extension; centre frequency of IF2
selectivity alignment via the I2 C-bus Level detector for AM and FM with temperature
compensated output voltage; starting point and slopeof
level output is programmable via the I2 C-bus 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 I2 C-bus AM IF2 AGC and demodulator AM AF output switchable to provide AM IF2 for stereo decoder AM noise blanker with detection at IF1 and blanking at IF2 Software controlled flag output Buffer output for weather band flag Adjacent channel detector, modulation detector and
frequency offsetfor instantaneous bandwidth controlof
the integrated filter Flag and voltage output indicating the actual bandwidthI2 C-bus alignment ofcentrefrequency and gain variation
as functions of bandwidth of the IF2 filter and centre
frequency of the offset detector. GENERAL DESCRIPTION
The TEA6848H is a single IC with car radio tuner for AM,
FM and Weather Band (WB) intended for microcontroller
tuning with theI2 C-bus.It provides the following functions: AM double conversion receiver for LW, MW and SW
(31m,41m and49m bands) with IF1= 10.7 MHz and
IF2= 450 kHz FM double conversion receiver with integrated image
rejectionfor IF1 andfor IF2 capableof selecting US FM, weather, Europe FM, East Europe FM and
Japan FM bands; fully integrated dynamic selectivityat
450 kHz FM IF2; FM demodulator with dynamic
threshold extension; centre frequency alignment of IF2
selectivity via the I2 C-bus The tuning system includes VCO, crystal oscillator and
PLL synthesizer on one chip. ORDERING INFORMATION
Philips Semiconductors Product specification
New In Car Entertainment car radio tuner IC with
Precision Adjacent Channel Suppression (NICE-P ACS) TEA6848H QUICK REFERENCE DATA
Philips Semiconductors Product specification
New In Car Entertainment car radio tuner IC with
Precision Adjacent Channel Suppression (NICE-P ACS) TEA6848H
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... BLOCK DIAGRAM
Philips Semiconductors Product specification
New In Car Entertainment car radio tuner IC with
Precision Adjacent Channel Suppression (NICE-P ACS) TEA6848H PINNING
Philips Semiconductors Product specification
New In Car Entertainment car radio tuner IC with
Precision Adjacent Channel Suppression (NICE-P ACS) TEA6848H
Philips Semiconductors Product specification
New In Car Entertainment car radio tuner IC with
Precision Adjacent Channel Suppression (NICE-P ACS) TEA6848H
Philips Semiconductors Product specification
New In Car Entertainment car radio tuner IC with
Precision Adjacent Channel Suppression (NICE-P ACS) TEA6848H FUNCTIONAL DESCRIPTION
7.1 Oscillators

7.1.1 VCO
Thevaractor tuned VCO providesthelocal oscillator signal
for both FM and AM mixer 1. It has a frequency range of
162.9to 248.2 MHz.
7.1.2 PLL
Fast synthesizer PLL tuning system with local control for
inaudible RDS updating.
7.1.3 CRYSTAL OSCILLATOR
The crystal oscillator provides a 20.5 MHz signal that is
used for: Reference frequency for frequency synthesizer PLL Local oscillator for AM mixer 2 and FM mixer2 Reference frequency for the IF counter Timing signal for the RDS update algorithm Reference frequency (75.368 kHz)for the TEA688x (car
audio signal processor - CASP) or TEF689x (car radio
integrated signal processor - CRISP).
7.2 DAA
reduce the numberof manual alignmentsin production
the following I2 C-bus controlled Digital Auto Alignment
(DAA) functions are included: FM RF DAA 7-bit DAA circuitry for the conversion of the VCO
tuning voltage to a controlled alignment voltage for
the FM antenna tank circuit FM and AM level DAA Level DAA circuitryfor alignmentof slope (3-bit) and
starting point (5-bit) of the level curve IF2 centre DAA Centre frequency alignment (7-bit) of integrated IF2 dynamic selectivity.
7.3 FM signal channel

7.3.1 FM MIXER1 quadrature mixer convertsFM RF (65to 108 MHzand
weather band) to IF of 10.7 MHz. The FM mixer provides
inherent image rejection and high RF sensitivity.
It is capable of tuning the US FM, US weather,
Europe FM, Japan FM and East Europe FM bands: US FM= 87.9to 107.9 MHz US weather FM= 162.4to 162.55 MHz Europe FM= 87.5to 108 MHz Japan FM=76to91 MHz East Europe FM=65to74 MHz.
7.3.2 BUFFER OUTPUT FOR WEATHER BAND FLAG
(PIN WBFLAG)
The buffer output on pin WBFLAG is HIGH for weather
band mode.
7.3.3 FM KEYED AGC
The AGC thresholdis programmable and the keyed AGC
function is switchable via the I2 C-bus. AGC detection
occursat the inputof the first FM mixer.If the keyed AGC
functionis activated, the AGCis keyed onlyby the narrow
band level. The AGC PIN diode drive canbe activated via
theI2 C-busasa local functionfor search tuning. The AGC
sourcesa constant10 mA current into the FM PIN diodein
AM mode.
7.3.4 FMIF AMPLIFIER
The FMIF amplifier provides18 dB amplification with high
linearity over a wide dynamic range.
7.3.5 FM MIXER2
The FM mixer 2 converts 10.7 MHz FM IF1 to 450 kHz IF2inI andQ phaseto achieve image rejectionin the
demodulator.
Philips Semiconductors Product specification
New In Car Entertainment car radio tuner IC with
Precision Adjacent Channel Suppression (NICE-P ACS) TEA6848H
7.3.6 FM IF2 DYNAMIC SELECTIVITY
The IF bandwidth of the FM IF2 is automatically adjusted
depending on modulation and reception conditions. The
centre frequency of the selectivity is adjusted by a 7-bit
instruction via the I2 C-bus. The dynamic selectivity mode
and three fixed bandwidths (60, 90 and 130 kHz) can be
selected via the I2C-bus. The IF2 bandwidth is set to kHz in weather band mode.
7.3.7 FM QUADRATURE DEMODULATOR
The FM quadrature demodulator is adjustment free.
7.3.8 ADJACENT CHANNEL DETECTOR AND THRESHOLD
EXTENSION
In the event of breakthrough of a strong neighbouring
transmitter, the IF2 bandwidth is reduced dynamically. low RF input voltages and low modulation levels the IF2
bandwidth is reduced to achieve improved sensitivity by
demodulator threshold extension.
7.3.9 BANDWIDTH CONTROL ‘ACTIVE’ FLAG
(PIN IFBWFLAG)
Flag output IBFW= 1 from pin IFBWFLAG indicates that
the IF2 bandwidth is reduced.
7.3.10 BANDWIDTH CONTROL MONITOR VOLTAGE
(PIN VIFBW)
Theactual bandwidthis indicatedbya voltageat pin VIFBW
that is proportional, not linear, to the IF bandwidth.
7.4 AM signal channel

7.4.1 AM TUNER INCLUDING MIXER1 AND MIXER2
The AM tuneris realizedina double conversion technique
and is capable of selecting LW, MW and SW bands. mixer 1 converts AM RF to IF1 of 10.7 MHz, while mixer 2 converts IF1 of 10.7 MHz to IF2 of 450 kHz: LW= 144to 288 kHz MW= 530to 1710 kHz (US AM band) SW= 5.73to 9.99 MHz (including the 31 m, 41 m and m bands).
7.4.2 AM RF AGC
The AM wideband AGC in front of the first AM mixer is
realized firstbya cascaded NPN transistor, which controls
the transconductanceof the RF amplifier JFET with10dB
of AGC range. Second, an AM PIN diode stage with
antenna type and frequency dependent AGC range is
available. The minimum JFET drain source voltage is
controlled by a DC feedback loop (pin VAMCASFB) in
order to limit the cascode AGC range to 10 dB. If the
cascode AGC is not required, a simple RF AGC loop is
possible by using only a PIN diode. In this event
pins VAMCASFB and VAMCAS have to be open-circuit. FM mode, the cascade switches off the JFET bias
currentto reduce total power consumption. The PIN diode
is biased by 1 mA in FM mode.
The AGC detection pointsfor AM AGC areat the first AM
mixer input (threshold programmablevia theI2 C-bus) and
the IF2 AGC input (fixed threshold).
7.4.3 AM DETECTOR
The AM output provides either a detected AM AF or the
corresponding AM IF2 signal. The IF2 signal canbe used
for AM stereo decoder processing. Soft mute function is
controlled by the I2 C-bus in AM mono mode.
7.4.4 AM NOISE BLANKER
The detection pointfor the AM noise blankeris the output
stage of AM mixer 1, while blanking is realized at the
output of the mixer2.
Trigger sensitivity can be modified by adding an external
resistor at pin AMNBHOLD.
7.5 FM and AM level detector
and AM level detectors provide the temperature
compensated output voltage. The starting points and
slopesof the level detector outputs are programmable via
the I2 C-bus.
Philips Semiconductors Product specification
New In Car Entertainment car radio tuner IC with
Precision Adjacent Channel Suppression (NICE-P ACS) TEA6848H
7.6 IF2 filter gain alignment

The 4-bit filter gain alignment reduces the change in filter gain spread when the bandwidth is changed in
dynamic mode from 155 kHz (maximum) to 25 kHz
(minimum).
A frequency has to be chosen in the middle of
European/US FM band, Japan band or OIRT band (for
East Europe) and the IC has to be set into dynamic
bandwidth mode (IF2 bandwidth is 155 kHz).
Setting and clearing the FMBWbit continuously allows the
adjustment of the gain alignment to minimum change in
AM/FM DC level.
7.7 Frequency offset detector/alignment
very strong undesired neighbouring signal causes offset
in the demodulator in case of weak desired input signal.
The frequency offset detector reduces the bandwidth of
the IF2 filter when the detected offset in the demodulator
is too large.
There are four bits available for frequency offset detector
alignment. Every band has to be aligned separately.
Tuning has to be set to middle of the band, input signal
unmodulated, bit IFBW= 1 (alignment voltage will be
given to pin IFBWFLAG). The DC voltage at
pin IFBWFLAG has to be aligned to the minimum value. LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 60134).
Notes
To avoid damage and wrong operationitis necessaryto keepall 8.5V supply voltagesata higher level than any5V
supply voltage. This is also necessary during power-on and power-down sequences. Precautions have to be
provided in such a way that interference cannot pull down the 8.5 V supply below the 5 V supply. Machine model (R=0 Ω, C= 200 pF). Human body model (R= 1.5 kΩ, C= 100 pF). THERMAL CHARACTERISTICS
Philips Semiconductors Product specification
New In Car Entertainment car radio tuner IC with
Precision Adjacent Channel Suppression (NICE-P ACS) TEA6848H DC CHARACTERISTICS
VDDA(n)= 8.5 V; VDDA5 =5V; VDDD =5V; Tamb =25 °C; tested in the circuit of Figs10 and 11; unless otherwise
specified.
Philips Semiconductors Product specification
New In Car Entertainment car radio tuner IC with
Precision Adjacent Channel Suppression (NICE-P ACS) TEA6848H AC CHARACTERISTICS
VDDA(n) =VMIX1OUT1 =VMIX1OUT2 =VAMMIX2OUT1 =VAMMIX2OUT2= 8.5V; VDDD =VDDA5 =5V; Tamb =25 °C; testedin the
circuit of Figs10 and 11; all AC values are given in RMS; unless otherwise specified.
Philips Semiconductors Product specification
New In Car Entertainment car radio tuner IC with
Precision Adjacent Channel Suppression (NICE-P ACS) TEA6848H
Philips Semiconductors Product specification
New In Car Entertainment car radio tuner IC with
Precision Adjacent Channel Suppression (NICE-P ACS) TEA6848H
Philips Semiconductors Product specification
New In Car Entertainment car radio tuner IC with
Precision Adjacent Channel Suppression (NICE-P ACS) TEA6848H
Philips Semiconductors Product specification
New In Car Entertainment car radio tuner IC with
Precision Adjacent Channel Suppression (NICE-P ACS) TEA6848H
Philips Semiconductors Product specification
New In Car Entertainment car radio tuner IC with
Precision Adjacent Channel Suppression (NICE-P ACS) TEA6848H
Philips Semiconductors Product specification
New In Car Entertainment car radio tuner IC with
Precision Adjacent Channel Suppression (NICE-P ACS) TEA6848H
Philips Semiconductors Product specification
New In Car Entertainment car radio tuner IC with
Precision Adjacent Channel Suppression (NICE-P ACS) TEA6848H
Philips Semiconductors Product specification
New In Car Entertainment car radio tuner IC with
Precision Adjacent Channel Suppression (NICE-P ACS) TEA6848H
Philips Semiconductors Product specification
New In Car Entertainment car radio tuner IC with
Precision Adjacent Channel Suppression (NICE-P ACS) TEA6848H
Philips Semiconductors Product specification
New In Car Entertainment car radio tuner IC with
Precision Adjacent Channel Suppression (NICE-P ACS) TEA6848H
Philips Semiconductors Product specification
New In Car Entertainment car radio tuner IC with
Precision Adjacent Channel Suppression (NICE-P ACS) TEA6848H
Philips Semiconductors Product specification
New In Car Entertainment car radio tuner IC with
Precision Adjacent Channel Suppression (NICE-P ACS) TEA6848H
Philips Semiconductors Product specification
New In Car Entertainment car radio tuner IC with
Precision Adjacent Channel Suppression (NICE-P ACS) TEA6848H
Notes
Measured between pins XTAL1 and XTAL2. DAA conversion gain formula: ; where
n=0to 127. Input parameters of FM mixer 2 measured between pins FMMIX2IN and FMMIX2DEC. Input parameters of AM IF2 measured between pins AMIF2IN and AMIF2DEC. Reference frequency pin FREF: Rext =68kΩ connected to ground activates the 2nd I2C-bus address. Input parameters of AM mixer 1 measured between pins AMMIX1DEC and AMMIX1IN. Output parameters of FM mixer and AM mixer 1 measured between pins MIX1OUT1 and MIX1OUT2. Input parameters of AM mixer 2 measured between pins IFAMPIN and IFAMPDEC. Output parameters of AM mixer 2 measured between pins AMMIX2OUT1 and AMMIX2OUT2.
10. Input parameters of FM mixer measured between pins FMMIXIN1 and FMMIXIN2. DAAOUT 2 0.75 n
128---------- 0.125+× × V DAAIN V DAATD+ ()× V DAATD–=
Philips Semiconductors Product specification
New In Car Entertainment car radio tuner IC with
Precision Adjacent Channel Suppression (NICE-P ACS) TEA6848H
Philips Semiconductors Product specification
New In Car Entertainment car radio tuner IC with
Precision Adjacent Channel Suppression (NICE-P ACS) TEA6848H
Philips Semiconductors Product specification
New In Car Entertainment car radio tuner IC with
Precision Adjacent Channel Suppression (NICE-P ACS) TEA6848H
Philips Semiconductors Product specification
New In Car Entertainment car radio tuner IC with
Precision Adjacent Channel Suppression (NICE-P ACS) TEA6848H
Philips Semiconductors Product specification
New In Car Entertainment car radio tuner IC with
Precision Adjacent Channel Suppression (NICE-P ACS) TEA6848HI2 C-BUS PROTOCOL
12.1I2 C-bus specification

Informationabout theI2 C-bus canbe foundin the brochure
“The I2C-bus and how to use it” (order number
9398 393 40011).
The standard I2 C-bus specification is expanded by the
following definitions. addresses: 1st IC address C2H: 1100001 R/W 2nd IC address C0H: 1100000 R/W.
Structure of the I2 C-bus logic: slave transceiver with auto
increment.
Subaddresses are not used. secondI2 C-bus address canbe selectedby connecting
pin FREF via a 68 kΩ resistor to GND.
12.1.1 DATA TRANSFER
Data sequence: address, byte 0, byte 1, byte 2, byte3,
byte4, byte5, byte6, and byte7. The data transfer hastoin this order. The LSB=0 indicatesa WRITE operation
to the TEA6848H.
Bit 7 of each byte is considered the MSB and has to be
transferred as the first bit of the byte.
The data becomes valid at the output of the internal
latches with the acknowledge of each byte. A STOP
condition after any byte can shorten transmission times.
When writing to the transceiver by using the STOP
condition before completion of the whole transfer: The remaining bytes will contain the old informationIf the transferofa byteis not completed, this byteis lost
and the previous information is available.
12.1.2 I2 C-BUS PULL-UP RESISTORS
When the IC is used together with the TEA688x or
TEF689x and both SCL and SDA lines are connectedvia
the I2 C-bus to the TEA688x or TEF689x, the pull-up
resistorsof the tunerIC shouldbe connectedto the digital
supply voltageof the TEA688xor TEF689x. Otherwisean2 C-bus pull-down can occur switching off the tunerIC
supply when the I2C-bus buffer interface of the TEA688x
or TEF689x is enabled for data transfer to the tuner IC.
12.1.3 FREQUENCY SETTING
For new frequency setting,in both AM and FM mode, the
programmable divideris enabledby settingbit MUTE=1. selectan FM frequency, twoI2 C-bus transmissions are
necessary: First: bit MUTE=1 Second: bit MUTE=0.
12.1.4 DEFAULT SETTINGS
No default settings at power-on reset. One I
2 C-bus
transmission is required to program the IC.
12.1.5 TIMING REQUIREMENTS
Table 1
Timing requirements of I2 C-bus software
Philips Semiconductors Product specification
New In Car Entertainment car radio tuner IC with
Precision Adjacent Channel Suppression (NICE-P ACS) TEA6848H
12.2I2 C-bus protocol

12.2.1 DATA TRANSFER MODE ANDIC ADDRESS
Table 2
Write mode
Notes
S= START condition. A= acknowledge. P= STOP condition.
Table 3
Read mode
Notes
S= START condition. A= acknowledge.
Table 4
IC address byte
Notes
Defined by address pin FREF:1= 1st IC address0= 2nd IC address. Read or write mode:0= write operation to TEA6848H1= read operation from TEA6848H.
12.2.2 WRITE MODE: DATA BYTE0
Table 5
Format of data byte0
Table 6
Description of data byte 0 bits
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