19-1913; Rev 0; 1/01
ANUAL
N KIT M EET
ATIO
SH
EVALU
S DATA
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2.4GHz Monolithic Voltage-Controlled
Oscillator with Differential Outputs
Features
o
Guaranteed Frequency Tuning Range: 2400MHz
to 2500MHz
o
Compatible with Low-IF or Zero-IF Radio
Architectures
o
Differential Outputs
o
On-Chip Tank Circuit
o
Internally Matched Output Buffer Amplifier
o
1碌A(chǔ) Shutdown Mode
o
+2.7V to +5.5V Supply Voltage Range
o
Miniature 8-Pin 碌MAX Package
General Description
The MAX2753 is a self-contained voltage-controlled oscil-
lator (VCO) intended for use in 2.4GHz radios that utilize a
low-IF or zero-IF architecture. It combines a fully integrat-
ed oscillator and output buffer in a miniature 8-pin 碌MAX
package.
The inductor and varactor elements of the tank are inte-
grated on-chip, greatly simplifying application of the part.
The only required external components are a couple of
supply bypass capacitors. The MAX2753 provides direct
connection to the VCO tuning voltage input and the VCO
buffer output. The tuning voltage input range is +0.4V to
+2.4V, and the oscillator frequency tuning range is factory
adjusted to provide guaranteed limits. The output signal is
buffered by an amplifier stage (internally matched to 50鈩?
to provide higher output power and isolate the device from
load impedance variations. In addition, the MAX2753 pro-
vides differential outputs.
The MAX2753 operates over a +2.7V to +5.5V supply volt-
age range. Internal regulation of the oscillator supply volt-
age eliminates the need for an external LDO regulator for
the VCO. The MAX2753 also provides a digitally controlled
shutdown mode to permit implementation of sophisticated
power-supply management. In shutdown, the supply cur-
rent is reduced to less than 1碌A(chǔ).
MAX2753
Ordering Information
PART
MAX2753EUA
TEMP. RANGE
-40擄C to +85擄C
PIN-PACKAGE
8
碌MAX
Pin Configuration
TOP VIEW
BYP
1
8
7
GND
OUTN
V
CC
OUTP
TUNE
2
________________________Applications
802.11 FHSS WLAN
Home RF
2.4GHz Bluetooth ISM Proprietary Radio
MAX2753
GND
3
6
5
SHDN
4
碌MAX
Typical Operating Circuit
BYP
GND
TUNE
TUNE
OSCILLATOR
CORE
OUTN
OUT TO MIXER/
SYNTHESIZER
GND
V
CC
V
CC
MAX2753
SHDN
OUTP
BIAS
OUT TO MIXER/
SYNTHESIZER
SHDN
________________________________________________________________
Maxim Integrated Products
1
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim鈥檚 website at www.maxim-ic.com.
Maxim
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