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AVAILABLE
EVALUATION KIT AVAILABLE
MAX2605–MAX2609 45MHz to 650MHz, Integrated IF
VCOs with Differential Output
General Description
The MAX2605–MAX2609 are compact, high-performance intermediate-frequency (IF) voltage-controlled oscillators (VCOs) designed specifically for demanding portable wireless communication systems. They combine monolithic 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–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 driving 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.
Applications
Cellular and PCS Mobile Phones
2.4GHz ISM Band
902MHz to 928MHz ISM Band
Land Mobile Radio
GPS Receivers Functional Diagrams
General-Purpose IF Oscillators
PART
MAX2605 MAX2606 MAX2607 MAX2608 MAX2609
Selector Guide
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
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
Ordering Information
PART
MAX2605EUT-T MAX2606EUT-T MAX2607EUT-T MAX2608EUT-T MAX2609EUT-T
TEMP. RANGE
-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
PINPACKAGE
6 SOT23-6 6 SOT23-6 6 SOT23-6 6 SOT23-6 6 SOT23-6
TOP MARK
AABB AABC AABD AABE AABF
TOP VIEW
IND 1 GND 2 TUNE 3
Pin Configuration/ Functional Diagram
MAX2605 MAX2606 MAX2607 MAX2608 MAX2609
6 OUT+ 5 VCC 4 OUT-
Pin Configurations appear at end of data sheet. Functional Diagrams continued at end of data sheet. UCSP is a trademark of Maxim Integrated Products, Inc.
SOT23-6
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-1673; Rev 0a; 4/02
MAX2605–MAX2609
45MHz to 650MHz, Integrated IF VCOs with Differential Output
ABSOLUTE MAXIMUM RATINGS
VCC to GND ..............................................................-0.3V to +6V IND to GND ................................................-0.6V to (VCC + 0.3V) TUNE to GND .............................................-0.3V to (VCC + 0.3V) OUT+, OUT- to GND ..................................-0.3V to (VCC + 0.6V) Continuous Power Dissipation (TA = +85°C)
6-Pin SOT23 (derate 8.7mW/°C above +70°C) ...........696mW
Operating Temperature Range ...........................-40°C to +85°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
(VCC = +2.7V to +5.5V, VTUNE = 0.4V to 2.4V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = +2.75V, VTUNE = 1.5V, and TA = +25°C.) (Note1)
PARAMETER Supply Voltage
Supply Current (Note 2)
DC Output Current (Note 3) TUNE Input Current
CONDITIONS
MAX2605 MAX2606 MAX2607 MAX2608 MAX2609 OUT+ plus OUT-
TA = +25°C TA = -40°C to +85°C TA = +25°C TA = -40°C to +85°C TA = +25°C TA = -40°C to +85°C TA = +25°C TA = -40°C to +85°C TA = +25°C TA = -40°C to +85°C
MIN TYP MAX UNITS
2.7 5.5 1.9 2.6
V
2.8
2.1 2.7
3.0
2.1 3.2
3.5 mA
2.7 4.4
5.5
3.6 6.8
7.5
0.5 1.0 1.5
mA
0.03 nA
2 Maxim Integrated
MAX2605–MAX2609
45MHz to 650MHz, Integrated IF VCOs with Differential Output
AC ELECTRICAL CHARACTERISTICS
(MAX2605–MAX2609 EV kits, VCC = +2.7V to +5.5V, VTUNE = 0.4V to 2.4V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = +2.75V, VTUNE = 1.5V, and TA = +25°C.) (Note 1)
PARAMETER Oscillator Nominal Frequency Range (Note 4)
Guaranteed Frequency Limits (relative to nominal) (Note 5)
Peak Tuning Gain Single-Ended Output Power (Note 7)
Phase Noise (Note 8)
CONDITIONS
MAX2605
MAX2606
MAX2607
MAX2608
MAX2609
MAX2605
TA = +25°C TA = -40°C to +85°C
MAX2606
TA = +25.