19-1673; Rev 0a; 4/02
NUAL
KIT MA
ATION
EVALU
BLE
AVAILA
45MHz to 650MHz, Integrated IF
VCOs with Differential Output
Features
o
Small Size
o
Integrated Varactor for Tuning
o
Low Phase Noise
o
Wide Application Frequency Range
o
Differential or Single-Ended Outputs
o
Single +2.7V to +5.5V Supply
o
Ultra-Small SOT23-6 Package
o
On-Chip Temperature-Stable Bias
o
Low-Current Operation
General Description
The MAX2605鈥揗AX2609 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.
These low-noise VCOs feature an on-chip varactor and
feedback capacitors that eliminate the need for external
tuning elements, making the MAX2605鈥揗AX2609 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鈥揗AX2609 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.
MAX2605鈥揗AX2609
Ordering Information
PART
TEMP. RANGE
-40擄C to +85擄C
-40擄C to +85擄C
-40擄C to +85擄C
-40擄C to +85擄C
-40擄C to +85擄C
PIN-
PACKAGE
6 SOT23-6
6 SOT23-6
6 SOT23-6
6 SOT23-6
6 SOT23-6
TOP
MARK
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
MAX2605EUT-T
MAX2606EUT-T
MAX2607EUT-T
MAX2608EUT-T
MAX2609EUT-T
Selector Guide
PART
MAX2605
MAX2606
MAX2607
MAX2608
MAX2609
FREQUENCY
RANGE
(MHz)
45 to 70
70 to 150
150 to 300
300 to 500
500 to 650
SUPPLY
CURRENT
(mA)
1.9
2.1
2.1
2.7
3.6
PHASE
NOISE
(dBc/Hz)
-117
-112
-107
-100
-93
IND
1
Pin Configuration/
Functional Diagram
TOP VIEW
GND
2
MAX2605
MAX2606
MAX2607
MAX2608
MAX2609
6
OUT+
5
V
CC
TUNE
3
4
OUT-
SOT23-6
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim鈥檚 website at www.maxim-ic.com.