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PDF MAX2606 Data sheet ( Hoja de datos )
| Número de pieza | MAX2606 | |
| Descripción | Integrated IF VCOs | |
| Fabricantes | Maxim Integrated | |
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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 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–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.
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
PIN-
PACKAGE
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
1 page  
MAX2605–MAX2609
45MHz to 650MHz, Integrated IF
VCOs with Differential Output
Typical Operating Characteristics (continued)
(MAX260_ EV kit, VCC = +2.75V, VTUNE = 1.4V, TA = +25°C, unless otherwise noted.)
MAX2606
VCO TUNING CURVE
130
MAX2607
VCO TUNING CURVE
260
MAX2608
VCO TUNING CURVE
430
240
120 400
220
110 370
200
100 340
180
90
0
0.5 1.0 1.5 2.0 2.5 3.0
160
0
0.5 1.0 1.5 2.0 2.5 3.0
310
0
0.5 1.0 1.5 2.0 2.5 3.0
VTUNE (V)
VTUNE (V)
VTUNE (V)
MAX2609
VCO TUNING CURVE
680
OUTPUT SPECTRUM
0
640 -10
600 -20
560 -30
520 -40
480
0
0.5 1.0 1.5 2.0 2.5 3.0
VTUNE (V)
-50
fo 2fo 3fo 4fo 5fo 6fo 7fo
FREQUENCY
Pin Description
PIN NAME
FUNCTION
1
IND
Tuning Inductor Port. Connect an inductor from IND to GND to set VCO center frequency (see Oscillation
Frequency).
2 GND Ground. Connect to the ground plane with a low-inductance path.
3 TUNE Voltage-Control Input for Frequency Tuning. Input voltage range from +0.4V to +2.4V.
4
OUT-
High-Impedance Open-Collector Output. An external pull-up resistor or inductor to VCC is required. Output
power is dependent on external load impedance. OUT- is complementary to OUT+.
5
VCC
Supply Voltage Connection. Connect an external bypass capacitor to ground for low noise and low spuri-
ous-output content. See Layout Issues for more details.
6
OUT+
High-Impedance Open-Collector Output. An external pull-up resistor or inductor to VCC is required. Output
power is dependent on external load impedance. OUT+ is complementary to OUT-.
Maxim Integrated
5
5 Page 
MAX2605–MAX2609
45MHz to 650MHz, Integrated IF
VCOs with Differential Output
14.0
13.5
13.0
12.5
12.0
11.5
11.0
10.5
10.0
9.5
9.0
8.5
MAX2609
REQUIRED INDUCTANCE vs. DESIRED VCO FIXED FREQUENCY
MEASUREMENT CONDITIONS
VCC = 2.75V, TA = 25°C,
RLOAD = 100Ω||50Ω (100Ω RESISTIVE PULL-UP PARALLELED WITH 50Ω
VNA IMPEDANCE), UNUSED OUTPUT TERMINATED IN 50Ω,
PCB PARASITIC SHUNT CAPACITANCE (IND TO GND) = 0.45pF
THE INDUCTANCE LISTED IS THE PRECISE NOMINAL INDUCTANCE VALUE
REQUIRED FROM IND TO GND IN ORDER TO GUARANTEE THE VCO
CAN TUNE TO THE DESIRED FIXED FREQUENCY, OVER ALL OPERATING
CONDITIONS AND WORST-CASE COMPONENT
VALUES (±2% INDUCTOR AND IC PROCESS VARIATION).
EFFECTIVE INDUCTANCE
FROM IND TO GND
8.0
7.5
7.0
6.5
6.0
INDUCTOR VALUE
MOUNTED ON EV KIT
5.5
5.0
4.5
4.0
3.5
500 510 520 530 540 550 560 570 580 590 600 610 620 630 640 650
DESIRED VCO FIXED FREQUENCY (MHz)
Figure 5. MAX2609 Required Inductance vs. Desired VCO Fixed Frequency
Maxim Integrated
11
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet MAX2606.PDF ] | |
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