EVALUATION KIT AVAILABLE
MAX2605–MAX2609
45MHz to 650MHz, Integrated IF
VCOs with Differential Output
General Description
Features
The MAX2605–MAX2609 are compact, high-performance
intermediate-frequency (IF) voltage-controlled oscillators
(VCOs) designed specifically for demanding portable
wireless communication systems. They combine monolith-
ic construction with low-noise, low-power operation in a
tiny 6-pin SOT23 package.
ꢀ Small Size
ꢀ Integrated Varactor for Tuning
ꢀ Low Phase Noise
ꢀ Wide Application Frequency Range
ꢀ Differential or Single-Ended Outputs
ꢀ Single +2.7V to +5.5V Supply
ꢀ Ultra-Small SOT23-6 Package
ꢀ On-Chip Temperature-Stable Bias
ꢀ Low-Current Operation
These low-noise VCOs feature an on-chip varactor and
feedback capacitors that eliminate the need for external
tuning elements, making the MAX2605–MAX2609 ideal
for portable systems. Only an external inductor is
required to set the oscillation frequency. In addition, an
integrated differential output buffer is provided for dri-
ving a mixer or prescaler. The buffer output is capable
of supplying up to -8dBm (differential) with a simple
power match. It also provides isolation from load
impedance variations.
The MAX2605–MAX2609 operate from a single +2.7V to
+5.5V supply and offer low current consumption. These IF
oscillators can cover the 45MHz to 650MHz frequency
range.
Ordering Information
PIN-
TOP
PART
TEMP. RANGE
PACKAGE MARK
MAX2605EUT-T
MAX2606EUT-T
MAX2607EUT-T
MAX2608EUT-T
MAX2609EUT-T
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
6 SOT23-6
6 SOT23-6
6 SOT23-6
6 SOT23-6
6 SOT23-6
AABB
AABC
AABD
AABE
AABF
Applications
Cellular and PCS Mobile Phones
2.4GHz ISM Band
902MHz to 928MHz ISM Band
Land Mobile Radio
GPS Receivers
General-Purpose IF Oscillators
Pin Configuration/
Functional Diagram
Selector Guide
FREQUENCY
RANGE
SUPPLY
CURRENT
(mA)
PHASE
NOISE
(dBc/Hz)
TOP VIEW
PART
(MHz)
MAX2605
MAX2606
MAX2607
MAX2608
MAX2609
45 to 70
70 to 150
150 to 300
300 to 500
500 to 650
1.9
2.1
2.1
2.7
3.6
-117
-112
-107
-100
-93
MAX2605
MAX2606
MAX2607
MAX2608
MAX2609
IND
GND
1
2
3
6
5
4
OUT+
V
CC
TUNE
OUT-
SOT23-6
For pricing, delivery, and ordering information, please contact Maxim Direct
19-1673; Rev 0a; 4/02
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.