Wideband I/Q Modulator with Sigma-Delta

Fractional-N Synthesizer

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3

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

MODULATION INPUT

BW (-1dB)

26

I/Q Input Bandwidth

BW (-3dB)

75

MHz

I/Q Differential Input Level

Assumes a sine-wave input to achieve the RFOUT output

power specified below

I/Q DC Input Resistance

200

k

Ω

I/Q Common-Mode Input Range

(Note 2)

1.5

1.6

1.7

V

RF OUTPUT

Frequency Range

700

2300

MHz

-7

-1

Output Power

-60

dBm

Output 1dB Compression Point

1

dBm

Output IP3

14

dBm

Carrier Suppression

34

dBc

Sideband Suppression

25

34

dBc

RF Output Noise Floor

-148

-143

dBm/Hz

Output Return Loss

(Note 3)

-9

dB

LO INPUT/OUTPUT

Frequency Range

700

2300

MHz

LO Input Power

(Note 2)

-12

-10

-7

dBm

LO Input Return Loss

-15

dB

LO Buffer Output Level

BUFEN = high (Note 2)

-14

-9.5

dBm

SIGMA-DELTA FRACTIONAL-N SYNTHESIZER

SYSTEM REQUIREMENTS

Frequency Range

(Note 2)

700

2300

MHz

Phase-Detector Input-Referred

Phase Noise Floor

-138

dBc/Hz

In-Loop Spurious Emissions

= CPX = 1 (Note 5)

-40

dBc

MAIN DIVIDER AND PHASE DETECTOR

Minimum Fractional-N Step Size

Phase-Detector Comparison

Frequency

20

30

MHz

Maximum N Division

251

Minimum N Division

35

AC ELECTRICAL CHARACTERISTICS

I+, Q+ single-ended input, driven from AC-coupled source. I-, Q- single-ended inputs are AC-coupled to GND. RFOUT and BUFOUT

output ports are terminated in 50

wise noted.) (Note 1)