MAX2120 datasheet(7/21 Pages) MAXIM

7 / 21 page

Complete, Direct-Conversion Tuner for DVB-S

and Free-to-Air Applications

_______________________________________________________________________________________

Typical Operating Characteristics (continued)

(MAX2120 Evaluation Kit: VCC = +3.3V, baseband output frequency = 5MHz; VGC1 = 1.2V; TA = +25°C. Default register settings

except ICP = 1 and BBG[3:0] = 1011.)

NOISE FIGURE vs. INPUT POWER

INPUT POWER (dBm)

-20

-30

-40

-50

-60

-70

-80

-10

ADJUST BBG[3:0] FOR 1VP-P

BASEBAND OUTPUT WITH

PIN = -75dBm AND VGC1 = 0.5V

fLO = 1500MHz

OUT-OF-BAND IIP3 vs. INPUT POWER

INPUT POWER (dBm)

-20

-30

-40

-50

-60

-70

-10

-20

-30

-80

-10

SEE NOTE 4 ON PAGE 4 FOR CONDITIONS

IN-BAND IIP3 vs. INPUT POWER

INPUT POWER (dBm)

-20

-30

-40

-50

-60

-70

-30

-50

-40

-10

-20

-60

-80

-10

SEE NOTE 3 ON PAGE 4 FOR CONDITIONS

IIP2 vs. INPUT POWER

INPUT POWER (dBm)

-20

-30

-40

-50

-60

-70

-10

-80

-10

SEE NOTE 5 ON PAGE 4 FOR CONDITIONS

INPUT RETURN LOSS vs. FREQUENCY

FREQUENCY (MHz)

2025

1800

1350

1575

1125

-20

-15

-10

-5

-25

900

2250

VGC1 = 2.7V

VGC1 = 0.5V

PHASE NOISE AT 10kHz OFFSET

vs. CHANNEL FREQUENCY

CHANNEL FREQUENCY (MHz)

2065

1875

1305 1495 1685

1115

-86

-82

-78

-74

-70

-90

-84

-80

-76

-72

-88

925

2255

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