19-1528; Rev 1; 5/00
Monolithic Voltage-Controlled Oscillators
General Description
Features
The MAX2622/MAX2623/MAX2624 self-contained volt-
age-controlled oscillators (VCOs) combine an integrat-
ed oscillator and output buffer in a miniature 8-pin
µMAX package.
ꢀ Fully Monolithic
ꢀ Guaranteed Performance
ꢀ On-Chip 50Ω Output Match
The inductor and varactor elements of the tank circuits
are integrated on-chip, greatly simplifying application of
the part. In addition, the center frequency of oscillation
and frequency span are factory preset to provide a
guaranteed frequency range versus control voltage. An
external tuning voltage controls the oscillation frequency.
The output signals are buffered by an amplifier stage
matched on-chip to 50Ω.
ꢀ Wide Choice of Frequencies
855MHz to 881MHz (MAX2622)
885MHz to 950MHz (MAX2623)
947MHz to 998MHz (MAX2624)
ꢀ +2.7V to +5.5V Single-Supply Operation
ꢀ Low-Current Shutdown Mode
ꢀ Smaller than Modules (8-Pin µMAX Package)
The MAX2622/MAX2623/MAX2624 operate from a
+2.7V to +5.5V supply voltage and require only 8mA of
supply current. In shutdown mode, the supply current is
reduced to 0.1µA.
Ordering Information
Applications
866MHz to 868MHz European ISM Band
(MAX2622)
PART
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
8 µMAX
MAX2622EUA
MAX2623EUA
MAX2624EUA
8 µMAX
DECT 1/2 Frequency LO (MAX2623)
8 µMAX
902MHz to 928MHz ISM Band, 10.7MHz IF
(MAX2623)
902MHz to 928MHz ISM Band, 45MHz to
70MHz IF (MAX2624)
Pin Configuration appears at end of data sheet.
Typical Operating Circuit
N.C.
GND
OUT
TUNE
TUNE
OSCILLATOR
CORE
OUT TO MIXER/
SYNTHESIZER
GND
220pF
V
V
CC
MAX2622
MAX2623
MAX2624
V
CC
CC
SHDN
SHDN
BIAS
220pF
________________________________________________________________ Maxim Integrated Products
1
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