Philips Semiconductors
Product specification
Car radio tuner front-end for digital IF
1
FEATURES
TEF6700HL
•
FM mixer for conversion of FM RF (64 to 108 MHz and
US weather band) to IF of 10.7 MHz; the mixer provides
inherent image rejection and can be switched from ‘low’
injection to ‘high’ injection Local Oscillator (LO) via the
I
2
C-bus; two different mixer conversion gains can be
selected via the I
2
C-bus
•
AGC PIN diode drive circuit for FM RF AGC; AGC
detection at FM mixer input; the AGC PIN diode drive
can be activated via 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
•
Digital alignment circuit for bus controlled matching of
oscillator tuning voltage to FM antenna tank circuit
tuning voltage
•
Buffer output for weather band flag
•
FM IF linear amplifier with high dynamic input range;
amplifier gain can be switched to two different positions
via the I
2
C-bus
•
FM IF AGC with multiplexed inputs for FM and In-Band
On-Channel Digital Audio Broadcast (IBOC DAB)
•
Buffer amplifier for FM IBOC DAB IF bypassing second
IF filter can be activated via I
2
C-bus
•
AM mixer 1 for conversion of AM RF to AM IF1
10.7 MHz
•
AM RF PIN diode drive circuit and RF JFET
conductance control by AGC cascode drive circuit; AGC
threshold detection at AM mixer 1 and IF2 AGC input;
threshold is programmable via the I
2
C-bus
•
AM noise blanker with blanking at AM IF2; AM noise
blanker can be deactivated via the I
2
C-bus
•
AM mixer 2 for conversion of AM IF1 to AM IF2 450 kHz
•
AM IF2 AGC
•
Multiplexer to output AM IF2 AGC and FM IF AGC to a
car IF DSP IC (e.g. SAA7724H)
•
AM/FM RF AGC monitor output
•
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
•
IF counter for AM IF2 and FM IF
•
LC tuner oscillator providing mixer frequencies for FM
mixer and AM mixer 1
•
Crystal oscillator providing mixer frequencies for AM
mixer 2 and reference for synthesizer PLL, IF count and
timing for Radio Data System (RDS) update
•
Fast synthesizer PLL tuning system with local control for
inaudible RDS updating
•
Timing function for RDS update algorithm and control
signal output for a car IF DSP IC (e.g. SAA7724H)
•
Three hardware programmable I
2
C-bus addresses; pin
BUSENABLE; two software controlled flag outputs
•
Several test modes for fast IC and system tests.
2
GENERAL DESCRIPTION
The TEF6700HL is a single chip car radio tuner for AM,
FM standard, FM IBOC DAB and weather band providing
gain controlled output of FM IF and AM IF2 for a car
IF DSP IC (e.g. SAA7724H) including the following
functions:
•
AM double conversion tuner for LW/MW/SW (31 m,
41 m and 49 m bands) with IF1 = 10.7 MHz and
IF2 = 450 kHz
•
FM single conversion tuner to an IF frequency of
10.7 MHz with integrated image rejection for US FM,
Europe FM, Japan FM, East Europe FM and weather
band reception; all bands can be selected using high
side or low side Local Oscillator (LO) injection
•
Tuning system includes VCO, crystal oscillator and
PLL synthesizer on one chip.
PACKAGE
TYPE NUMBER
NAME
TEF6700HL
LQFP64
DESCRIPTION
plastic low profile quad flat package; 64 leads; body 10
×
10
×
1.4 mm
VERSION
SOT314-2
2003 Oct 21
3
Analog electronics
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