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MAX2754EUA Datasheet(PDF) 1 Page - Maxim Integrated Products

Part # MAX2754EUA
Description  1.2GHz VCO with Linear Modulation Input
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX2754EUA Datasheet(HTML) 1 Page - Maxim Integrated Products

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General Description
The MAX2754 self-contained, linear modulation, volt-
age-controlled oscillator (VCO) is intended for use in
the 2.4GHz to 2.5GHz ISM band, particularly for FSK
modulation systems that utilize a direct frequency-mod-
ulation transmit architecture. This device features a lin-
ear modulation input in addition to the standard
frequency tuning input. The frequency tuning range of
1145MHz to 1250MHz (1/2 LO) also supports an IF up
to 110MHz with low side LO. The VCO is based on
Maxim’s proprietary monolithic VCO technology, where
all VCO components are integrated on-chip, including
the varactor and inductor.
The MAX2754 linear modulation input offers a means to
directly FM modulate the VCO with a constant modula-
tion sensitivity over the tuning voltage input range.
Typical frequency deviation is -500kHz/V which is linear
to ±4% over the guaranteed frequency limits. The tun-
ing input voltage range is +0.4V to +2.4V and the oscil-
lator frequency is factory adjusted to provide
guaranteed limits. The oscillator signal is buffered by
an output amplifier stage (internally matched to 50
Ω) to
provide higher output power and isolate the oscillator
from load impedance variations.
The MAX2754 operates over a +2.7V to +5.5V supply
range. This device also provides a digitally controlled
shutdown mode to permit implementation of sophisti-
cated power-supply management. In shutdown, the
supply current is reduced to 0.2µA. Even when active,
power consumption is a modest 41mW.
The MAX2754 is packaged in the miniature 8-pin µMAX
to offer the world’s smallest, complete 2.4GHz direct-
modulation VCO solution.
Applications
HomeRF WLAN
Bluetooth
2.4GHz Cordless Phones
2.4GHz Wireless Data Radios
Features
♦ Fully Monolithic VCO Construction with On-Chip
Inductor and Varactor Tuning Elements
♦ Guaranteed 1145MHz to 1250MHz Tuning Range
to Support 1/2 LO Applications
♦ Modulation Linearity Within ±4%
♦ Precise Modulation Gain (-500kHz/V)
♦ Low Phase Noise (-137dBc/Hz at 4MHz offset)
♦ +2.7V to +5.5V Single-Supply Operation
♦ Low-Current Shutdown Mode
♦ Miniature 8-Pin µMAX® Package
1.2GHz VCO with Linear
Modulation Input
________________________________________________________________ Maxim Integrated Products
1
1
2
3
4
8
7
6
5
VCC
OUT
GND2
SHDN
MOD
GND1
TUNE
VREG
MAX2754
µMAX
TOP VIEW
Pin Configuration
Ordering Information
SHDN
GND2
OUT
VCC
VCC
MOD
GND1
TUNE
TUNE
VREG
330nF
OUT TO
MIXER/
SYNTHESIZER
330nF
MODULATION
VOLTAGE
SIGNAL
MAX2754
REG AND BIAS
OSCILLATOR
CORE
LINEAR
MODULATION
INTERFACE
SHDN
Typical Operating Circuit
19-2102; Rev 2; 5/06
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
PART
TEMP RANGE
PIN-PACKAGE
MAX2754EUA
-40°C to +85°C
8 µMAX
(3mm 5mm)
8-pin µMAX
EVALUATION
KIT
AVAILABLE
µMAX is a registered trademark of Maxim Integrated Circuits, Inc.


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