ADF4158 datasheet(9/36 Pages) AD

Part #	ADF4158

Description	Direct Modulation/Waveform Generating, 6.1 GHz Fractional-N Frequency Synthesizer

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Manufacturer	AD [Analog Devices]

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ADF4158

Rev. 0 | Page 9 of 36

5.7995

5.7996

5.7997

5.7998

5.7999

5.8000

5.8001

5.8002

5.8003

5.8004

–0.010

0.010

–0.005

0.005

0

TIME (s)

Figure 11. FSK Superimposed on Rising Edge of Triangular Waveform;

Ramp Settings: PFD = 32 MHz, INT = 181, FRAC = 0, DEV Offset = 4, DEV

Word = 20972, Step Word = 200, CLK DIV = 10, MOD Divider = 125;

FSK Settings: DEV Offset = 3, DEV Word = 4194

5.79975

5.79980

5.79985

5.79990

5.79995

5.80005

5.80000

5.80010

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

TIME (ms)

Figure 12. FSK; Settings: Frequency Deviation = 100 kHz, Data Rate = 3 kHz

–30

–25

–20

–15

–10

–5

0

0.185

1.185

2.185

3.185

4.185

5.185

6.185

7.185

FREQUENCY (GHz)

Figure 13. RFIN Sensitivity-Average Over Temperature and VDD

–8

–6

–4

–2

0

2

4

6

0123

vCP (V)

45

6

Figure 14. Charge Pump Output Characteristics

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ADF4158 Datasheet(PDF) 9 Page - Analog Devices

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