Datasheet

45MHz to 650MHz, Integrated IF
VCOs with Differential Output
90
100
110
120
130
0 1.00.5 1.5 2.0 2.5 3.0
MAX2606
VCO TUNING CURVE
MAX2605/9-04
V
TUNE
(V)
FREQUENCY (MHz)
160
180
200
220
240
260
0 1.00.5 1.5 2.0 2.5 3.0
MAX2607
VCO TUNING CURVE
MAX2605/9-05
V
TUNE
(V)
FREQUENCY (MHz)
310
340
370
400
430
0 1.00.5 1.5 2.0 2.5 3.0
MAX2608
VCO TUNING CURVE
MAX2605/9-06
V
TUNE
(V)
FREQUENCY (MHz)
480
520
560
600
640
680
0 1.00.5 1.5 2.0 2.5 3.0
MAX2609
VCO TUNING CURVE
MAX2605/9-07
V
TUNE
(V)
FREQUENCY (MHz)
-50
-40
-30
-20
-10
0
4f
o
5f
o
2f
o
3f
o
f
o
6f
o
7f
o
MAX2605/9-08
FREQUENCY
(dB)
OUTPUT SPECTRUM
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.
PIN
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 V
CC
is required. Output
power is dependent on external load impedance. OUT- is complementary to OUT+.
6 OUT+
High-Impedance Open-Collector Output. An external pull-up resistor or inductor to V
CC
is required. Output
power is dependent on external load impedance. OUT+ is complementary to OUT-.
5 V
CC
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.
Pin Description
Typical Operating Characteristics (continued)
(MAX260_ EV kit, V
CC
= +2.75V, V
TUNE
= 1.4V, T
A
= +25°C, unless otherwise noted.)
MAX2605–MAX2609
Maxim Integrated
5