MAX2105CWI datasheet(7/16 Pages) MAXIM

7 / 16 page

Direct-Conversion Tuner ICs for

Digital DBS Applications

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-200

-150

-100

-50

100

0.8

1.1

1.4

1.7

2.0

2.3

LO PORT IMPEDANCE vs. FREQUENCY

(UNMATCHED)

FREQUENCY (GHz)

REAL

IMAGINARY

-10

-20

-25

-15

-30

-35

-40

IM3 LEVELS vs. INPUT CARRIER

POWER LEVEL

SINGLE INPUT CARRIER LEVEL (dBm)

TA = +70°C

TA = +25°C

TA = 0°C

f1 = 2148.1MHz

f2 = 2149MHz

fLO = 2151MHz

AGC SET VIA SERVO LOOP

FOR 0.5V PER TONE

-10

-20

-25

-15

-30

-35

-40

IM3 LEVELS vs. INPUT CARRIERS

POWER LEVEL

SINGLE INPUT CARRIER LEVEL (dBm)

TA = +70°C

TA = +25°C

TA = 0°C

f1 = 1448.1MHz

f2 = 1449MHz

fLO = 1451MHz

AGC SET VIA SERVO LOOP

FOR 0.5Vp-p PER TONE

Typical Operating Characteristics (continued)

(MAX2102 EV kit circuit (Figure 1), VCC = 5V, PSGND = open, MOD = GND, fRFIN = 2150MHz, PRFIN = -19dBm, fLO = 2150.125MHz,

PLO = -15dBm driven single-ended into LO, AGC set via servo loop for VIOUT = VQOUT = 0.5Vp-p, IOUT, QOUT drive AC-coupled

100

Ω loads, 2kΩ from PSOUT to GND, TA = +25°C, unless otherwise noted.)

-40

-20

REAL

100

0.8

1.1

1.4

1.7

2.0

2.3

LO PORT IMPEDANCE vs. FREQUENCY

FREQUENCY (GHz)

MATCHED: MAX2102 TYPICAL

OPERATING CIRCUIT

IMAGINARY

-100

-60

-80

-20

-40

100

0.8

1.1

1.4

1.7

2.0

2.3

RFIN PORT IMPEDANCE

vs. FREQUENCY

FREQUENCY (GHz)

REAL

IMAGINARY

MATCHED PER

EV KIT CIRCUIT

-100

-80

-90

-60

-70

-40

-50

-30

0.8

1.4

1.1

1.7

2.0

2.3

LO LEAKAGE AT RFIN vs. FREQUENCY

(SINGLE-ENDED LO DRIVE)

FREQUENCY (GHz)

PLO = -15dBm

PLO = -5dBm

PLO = -10dBm

-100

-80

-90

-60

-70

-40

-50

-30

0.8

1.4

1.1

1.7

2.0

2.3

LO LEAKAGE AT RFIN vs. FREQUENCY

(DIFFERENTIAL LO DRIVE)

FREQUENCY (GHz)

AGC SET FOR PRFIN = -69dBm

PLO REFERS TO POWER INTO

LO AND LO

PLO = -15dBm

PLO = -5dBm

PLO = -10dBm

-36

-34

-35

-32

-33

-31

-30

-20

-15

-10

-5

SPURIOUS DOWNCONVERSION DUE TO

INTERNALLY GENERATED LO 2ND HARMONIC

LO POWER (dBm)

fLO = 1075.5MHz

fRFIN = 2150MHz

PRFIN = -69dBm

LO DRIVEN

SINGLE ENDED

LO, LO DRIVEN DIFFERENTIAL

(PLO = -15dBm, PLO = -15dBm)

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