Datasheet

MAX2306/MAX2308/MAX2309
CDMA IF VGAs and I/Q Demodulators
with VCO and Synthesizer
6 _______________________________________________________________________________________
500
1100
900
700
1300
1500
1700
1900
2100
2300
2500
0 200100 300 400 500 600
IF PORT PARALLEL RESISTANCE
vs. FREQUENCY
MAX2306/8/9 toc10
FREQUENCY (MHz)
EQUIVALENT PARELLEL RESISTANCE (Ω)
MEASURED DIFFERENTIALLY
CDMA PORT
FM PORT
MAX2306/8/9 toc12
-400
-380
-340
-360
-280
-260
-300
-320
-240
EQUIVALENT PARELLEL RESISTANCE (Ω)
80 240 320160 400 480 560
FREQUENCY (MHz)
TANK PORT PARALLEL RESISTANCE
vs. FREQUENCY
TANKH
TANKL
MEASURED DIFFERENTIALLY
0
0.2
0.1
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
MAX2306/8/9 toc13
FREQUENCY (MHz)
EQUIVALENT PARELLEL CAPACITANCE (pF)
80 160 240 320 400 400 560
TANK PORT PARALLEL CAPACITANCE
vs. FREQUENCY
TANK
TANKL
MEASURED DIFFERENTIALLY
Typical Operating Characteristics (continued)
(MAX2306/MAX2308/MAX2309 EV kits, V
CC
= +2.75V, registers set to default power-up states, f
IN
= 183.7MHz, f
REF
= 19.2MHz,
synthesizer locked with passive 3rd-order lead-lag loop filter, SHDN = high, VGC set for +35dB voltage gain, differential output load
= 10kΩ, all power levels referred to 50Ω, T
A
= +25°C, unless otherwise noted.)
LOOUT PORT
S11 vs. FREQUENCY
MAX2310 toc14
START: 10MHz
STOP: 600MHz
0.5
0.7
0.6
0.9
0.8
1.1
1.0
1.2
0 200 300100 400 500 600
MAX2306/8/9 toc11
FREQUENCY (MHz)
EQUIVALENT PARELLEL CAPACITANCE (pF)
IF PORT PARALLEL CAPACITANCE
vs. FREQUENCY
CDMA PORT
FM PORT
MEASURED DIFFERENTIALLY