Wideband I/Q Modulator with Sigma-Delta

Fractional-N Synthesizer

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5

SUPPLY CURRENT

vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

3.3

3.0

20

40

60

80

+85

°C

+25

°C

-40

°C

TX MODE

100

0

2.7

3.6

MODULATION OUTPUT POWER

vs. FREQUENCY

FREQUENCY (MHz)

1900

1500

1100

-10

-8

-6

-4

-2

0

2

4

-12

700

2300

+85

°C

+25

°C

-40

°C

TXEN = HIGH

MODULATION OUTPUT POWER

vs. FREQUENCY

FREQUENCY (MHz)

1900

1500

1100

-67

-64

-61

-58

-55

-70

700

2300

+85

°C

+25

°C

-40

°C

TXEN = LOW

OUTPUT POWER vs. LO POWER

LO POWER (dBm)

11

10

8

9

-1.9

-1.8

-1.7

-1.6

-1.5

-1.4

-1.3

-1.2

-1.1

-1.0

-2.0

712

CARRIER AND SIDEBAND

SUPPRESSIONS vs. LO POWER

LO POWER (dBm)

11

10

9

8

33

34

35

36

37

38

32

712

SIDEBAND SUPPRESSION

CARRIER SUPPRESSION

MODULATOR OUTPUT POWER

vs. I/Q INPUT LEVEL

I/Q INPUT LEVEL (mV)

1400

1200

1000

800

600

400

200

-20

-16

-12

-8

-4

0

4

-24

0

-40

°C

+25

°C

+85

°C

Typical Operating Characteristics

gle-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