M
I
C
R
O
T
U
N E
RF SILICON AND SYSTEMS SOLUTIONS
FOR BROADBAND COMMUNICATIONS, AND AUTOMOTIVE ELECTRONICS
MT141X AM/FM ANTENNA
AMPLIFIER SERIES
PRODUCT BRIEF
The MT141X modules are optimized to
work with in-glass antennas. The
amplifiers are customized to meet the
specific housing, connector and
electrical matching requirements of
varied car platforms that deploy
different antennas, radios, and
mechanics.
MT141X AM/FM Antenna Amplifier Module
The Microtune MT141X AM/FM
antenna amplifiers are designed for
use in automobiles with state-of-the-
art in-glass antenna systems.
Since in-glass antennas need high
performance amplifiers to supply a
clean signal to the radio, the MT141X
modules are ideal for this demanding
environment. As most in-glass
antennas employ multiple FM
antennas, but use only one AM
antenna to add a diversity function for
FM, the MT141X amplifiers are
available in an AM/FM version and an
FM-only version.
They are engineered to deliver high
linearity and low noise, critical
features of an automotive AM/FM
receiving system. A low noise figure
enables high system sensitivity to
receive clear sound in rural areas,
while high linearity permits robust
performance in dense, urban signal
environments. The implemented AGC
circuit for FM provides additional
improvement of signal handling
capability.
The MT141X amplifiers also permit
designers to adjust key parameters,
including gain, AGC threshold, or
input/output impedance, providing the
flexibility to optimize performance and
integration of entire AM/FM receiver
system. Features such as phantom
power supply (power is supplied from
the car radio via the antenna cable)
are additionally offered as an option.
The power supply circuit includes
reverse voltage protection and the
antenna input provides ESD
protection. The amplifiers support the
frequency ranges of Japan, Europe
and the United States.
APPLICATIONS
•
Car radio applications
•
Automotive in-glass-antenna
systems with or without
diversity
AM FEATURES
•
World standard frequency
range: 150 kHz to 6290 kHz
•
Very high input impedance
•
Very low input capacitance
•
Low output impedance
•
Low IM2 distortion
•
Input protection
M I C R O T U N E
FM FEATURES
•
World standard frequency
range: 76 MHz to 108 MHz
•
Integrated AGC circuit
•
Low IM3 distortion
•
Low noise figure
•
Input protection
•
Suitable for antenna diversity
applications
GENERAL FEATURES
•
High performance voltage
stabilizer on board
•
Reverse voltage protection
•
Low power consumption
•
High stability over temperature
•
Optional phantom power
supply
•
Customizable key parameters,
frequency range, housing, and
connectors
•
Compact customized size of
around 13 cm
2
•
Meets automotive quality
standards
M T 1 4 1 X A NT E N NA A M P L I FI E R S E R I E S
PRODUCT BRIEF
OPERATING CHARACTERISTICS
P
ARAMETER
M
IN
T
YP
12
27
50
Antenna
Amplifier
Protection Circuit and
Voltage Stabilizer
+12V
M
AX
U
NIT
VCC
P
OWER
S
UPPLY
V
OLTAGE
Power supply voltage
Current consumption FM version
Current consumption AM/FM
version
V
mA
mA
FM
Input
AGC
Circuitry
Protection
Circuit
Matching
and BPF
FM
Amplifier
Matching
and BPF
T
EMPERATURE
Operating temperature
Parametric temperature range
Storage temperature
-40
-30
-40
+85
+75
+85
°C
°C
°C
VCC
Radio or
Diversity Unit
Output
12V
INPUT AND OUTPUT CHARACTERISTICS
P
ARAMETER
M
IN
T
YP
>10
75
100
75
customized
customized
LW/AM
Input
Protection
Circuit
LPF
AM
Amplifier
LPF
M
AX
U
NIT
VCC
A
MPLIFIER
I
NPUT
I
MPEDANCE
AM section
FM section
kΩ
Ω
Ω
Ω
A
MPLIFIER
O
UTPUT
AM impedance
FM impedance
MT141X Block Diagram (AM/FM version)
C
ONNECTORS
Output connector type
Input connector type
Antenna
Amplifier
FM ELECTRICAL CHARACTERISTICS
P
ARAMETER
FM bandwidth
Gain (adjustable)
Second order distortion
(Input: 2x100dBµV at f
1
= 98MHz
and f
2
= 98.8MHz,
Output: measured frequency =
f
2
-f
1
= 800 kHz)
Third order distortion
(Input: 2x100dBµV at f
1
= 98 MHz
and f
2
= 99 MHz,
Output: measured frequency =
2xf
1
-f
2
= 97 MHz)
AGC attack point (adjustable)
AGC dynamic range
Noise figure
VCC
Protection Circuit and
Voltage Stabilizer
+12V
M
IN
76
T
YP
8
M
AX
108
U
NIT
MHz
dB
FM
Input
Protection
Circuit
Matching
and BPF
AGC
Circuitry
10
dBµV
FM
Amplifier
Matching
and BPF
VCC
35
dBµV
Radio or
Diversity Unit
Output
12V
95
35
5
dBµV
dB
dB
MT141X Block Diagram (FM-only version)
AM ELECTRICAL CHARACTERISTICS
P
ARAMETER
Long wave (LW) band (optional)
Mid wave (MW) band
Short wave (SW) band (optional)
Gain (adjustable)
M
IN
150
522
5735
T
YP
M
AX
280
1629
6290
U
NIT
kHz
kHz
kHz
dB
5
Microtune, Inc., 2201 Tenth Street, Plano, TX 75074, USA
Tel: +1-972-673-1600, Fax: +1-972-673-1602, E-mail: sales@microtune.com, Web site:
www.microtune.com
For a detailed list of design centers, sales offices, and sales representatives, visit our Web site at
www.microtune.com.
The information in this document is believed to be accurate and reliable. Microtune assumes no responsibility for any consequences arising from the use of this information, nor from any infringement of patents or
the rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or other rights of Microtune. The information in this publication replaces and supersedes
all information previously supplied, and is subject to change without notice. The customer is responsible for assuring that proper design and operating safeguards are observed to minimize inherent and procedural
hazards. Microtune assumes no responsibility for applications assistance or customer product design.
The devices described in this document are not authorized for use in medical, life-support equipment, or any other application involving a potential risk of severe property or environmental damage, personal
injury, or death without prior express written approval of Microtune. Any such use is understood to be entirely at the user’s risk.
Microtune is a registered trademark of Microtune, Inc. MicroTuner, MicroStreamer, VideoCaster, DataCaster, and the Microtune logo are trademarks of Microtune, Inc. All other trademarks belong to their respective
companies.
Microtune’s products are protected by one or more of the following U.S. patents: DE10011662; GB1026825; ES1026825; DE19628727; DE19904588.7; DE348698; FR348698; GB348698; IT348698; DE3821716;
US5,933,946; DE50000802.7; DE552624 and additional patents pending or filed.
Entire contents Copyright © 1996 - 2005 Microtune, Inc.
041105
PB-00057—Rev 1.1
MAY 2005
Microcontroller MCU
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