19-1825; Rev 0; 10/00
UAL
IT MAN
TION K
A
SHEET
EVALU
S DATA
W
FOLLO
2.4GHz Monolithic
Voltage-Controlled Oscillators
Features
o
Guaranteed Frequency Tuning Range
MAX2750: 2400MHz to 2500MHz (Zero IF)
MAX2751: 2120MHz to 2260MHz
(240MHz to 280MHz IF)
MAX2752: 2025MHz to 2165MHz
(335MHz to 375MHz IF)
o
On-Chip Tank Circuit
o
Internally Matched Output Buffer Amplifier
o
Low-Current Shutdown Mode
o
+2.7V to +5.5V Supply Voltage Range
o
Miniature 8-Pin 碌MAX Package
General Description
The MAX2750/MAX2751/MAX2752 are self-contained volt-
age-controlled oscillators (VCOs) intended for use in the
2.4GHz to 2.5GHz ISM band. Each IC combines a fully
integrated 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 IC provides direct connec-
tion 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 adjust-
ed 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.
The MAX2750/MAX2751/MAX2752 operate over a +2.7V
to +5.5V supply voltage range. Internal regulation of the
oscillator supply voltage eliminates the need for an exter-
nal LDO regulator for the VCO. The IC also provides a dig-
itally controlled shutdown mode to permit implementation
of sophisticated power-supply management. In shutdown,
the supply current is reduced to less than 1碌A.
MAX2750/MAX2751/MAX2752
Ordering Information
PART
MAX2750EUA
MAX2751EUA
MAX2752EUA
TEMP. RANGE
-40擄C to +85擄C
-40擄C to +85擄C
-40擄C to +85擄C
PIN-PACKAGE
8 碌MAX
8 碌MAX
8 碌MAX
________________________Applications
802.11b DSSS WLAN
802.11 FHSS WLAN
Home RF
2.4GHz Bluetooth ISM Proprietary Radio
Pin Configuration appears at end of data sheet.
Typical Operating Circuit
BYP
GND
TUNE
TUNE
OSCILLATOR
CORE
OUT
OUT TO MIXER/
SYNTHESIZER
GND
V
CC1
SHDN
SHDN
MAX2750
MAX2751
MAX2752
BIAS
V
CC
V
CC2
________________________________________________________________
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.
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