RF SILICON AND SUBSYSTEMS SOLUTIONS
FOR BROADBAND COMMUNICATIONS AND AUTOMOTIVE ELECTRONICS
APPLICATIONS
The MT1468 AM/FM Double Tuner
Module is specifically designed to
meet the performance, quality and
pricing demands of automotive
customers.
MT1468 AM/FM DOUBLE
TUNER MODULE
•
High-end automotive
entertainment system
requiring digital IF
HD radio
PRODUCT BRIEF
•
To maximize sensitivity and
The MT1468 tuner module is designed for
high-end automobile radios and
entertainment system.
minimize dropouts due to multipath
interference, the MT1468 module
incorporates one AM tuner and two
independent FM tuner sections to
support a high-performance phase
diversity function. The 10.7 MHz IF
output can interface readily with a
dedicated DSP (e.g. Philips SAF
7730) to form a DSP-based digital
AM/FM radio system.
FEATURES
FM
•
•
•
High and low side injection to
avoid VCO interference
Passive FM pre-stage with
auto aligned tracking filter
Radio tuning state engine to
support inaudible RDS
updating
•
•
Image reject mixers
Keyed AGC selectable
While both FM tuners receive the
same frequency in “phase diversity”
mode, the FM tuners can also be
set to different frequencies to
receive a RDS channel in the
background while listening to
another station. An AF sample-and-
hold interface for the external DSP
enables inaudible checking of
alternative frequencies within the
RDS network.
AM
MT1468 Tuner Module
•
•
10.7 MHz Up-conversion
AM Dual AGC (Cascode and
PIN)
•
1st stage ceramic filtering
GENERAL
•
All functions controlled by
serial bus
The MT1468 module provides an
RF AGC with a closed loop control
and adjustable thresholds while the IF
AGC is controlled by the external
DSP. A keyed AGC function is
implemented to prevent receiver
desensitization due to erroneous AGC
response. Furthermore the module
features automatic alignment for the
tracking filters and the image rejection
filters. All tuner functions and
parameters can be controlled via a
serial bus interface.
•
•
Balanced IF outputs
High integration and fully
shielded housing
On-board EEPROM
Variable IF output gain
Lead-free and RoHS compliant
•
•
•
HD-Radio™ (IBOC) and DRM
capability with a reception of up to
26 MHz is optional. Versions for
special AM (LW/MW/SW) and FM
bands (Europe, USA, Japan) are
also available. The MT1468 module
was designed to withstand typical
automotive operating conditions and
fully complies with RoHS
requirements.
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