MAX2308EGI(2001) Ver la hoja de datos (PDF) - Maxim Integrated

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MAX2308EGI
(Rev.:2001)

CDMA IF VGAs and I/Q Demodulators with VCO and Synthesizer

Maxim Integrated 

CDMA IF VGAs and I/Q Demodulators

with VCO and Synthesizer

Typical Operating Characteristics (continued)

(MAX2306/MAX2308/MAX2309 EV kits, VCC = +2.75V, registers set to default power-up states, fIN = 183.7MHz, fREF = 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, TA = +25°C, unless otherwise noted.)

2500

2300

2100

1900

1700

1500

1300

1100

900

700

500

0

IF PORT PARALLEL RESISTANCE

vs. FREQUENCY

CDMA PORT

MEASURED DIFFERENTIALLY

FM PORT

100 200 300 400 500 600

FREQUENCY (MHz)

IF PORT PARALLEL CAPACITANCE

vs. FREQUENCY

1.2

MEASURED DIFFERENTIALLY

1.1

1.0

0.9

FM PORT

0.8

0.7

0.6

CDMA PORT

0.5

0

100 200 300 400 500 600

FREQUENCY (MHz)

TANK PORT PARALLEL RESISTANCE

vs. FREQUENCY

-240

MEASURED DIFFERENTIALLY

-260

-280

TANKH

-300

-320

-340

TANKL

-360

-380

-400

80

160 240 320 400 480 560

FREQUENCY (MHz)

TANK PORT PARALLEL CAPACITANCE

vs. FREQUENCY

1.2

1.1

TANK

1.0

0.9

0.8

0.7

TANKL

0.6

0.5

0.4

0.3

0.2

0.1 MEASURED DIFFERENTIALLY

0

80 160 240 320 400

400 560

FREQUENCY (MHz)

LOOUT PORT

S11 vs. FREQUENCY

START: 10MHz

STOP: 600MHz

6 _______________________________________________________________________________________

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