ADF4158 datasheet(8/36 Pages) AD

8 / 36 page

ADF4158

Rev. 0 | Page 8 of 36

TYPICAL PERFORMANCE CHARACTERISTICS

–160

–140

–120

–100

–80

–60

–40

10k

100k

10M

FREQUENCY OFFSET (Hz)

Figure 5. Phase Noise at 5805 MHz, PFD = 32 MHz, Loop Bandwidth = 100 kHz

5.78

5.79

5.80

5.81

5.82

5.83

5.84

5.85

5.86

–0.025

–0.015

–0.005

0.005

0.015

0.025

TIME (s)

Figure 6. Triangular Waveform, PFD = 32 MHz, INT = 181, FRAC = 0,

DEV Offset = 4, DEV Word = 20972, Step Word = 200, CLK DIV = 10,

MOD Divider = 125

5.75

5.77

5.79

5.81

5.83

5.85

5.87

–0.010

–0.005

0.005

0.010

TIME (s)

Figure 7. Sawtooth Waveform, PFD = 32 MHz, INT = 181, FRAC = 0,

DEV Offset = 4, DEV Word = 20972, Step Word = 200, CLK DIV = 10,

MOD Divider = 125

5.76

5.77

5.78

5.79

5.80

5.81

5.82

5.83

5.84

5.85

5.86

5.87

TIME (s)

–0.010

–0.005

0.005

0.010

Figure 8. Delay Between Ramps for Sawtooth Waveform, PFD = 32 MHz,

INT = 181, FRAC = 0, DEV Offset = 4, DEV Word = 20972, Step Word = 200,

CLK DIV = 10, MOD Divider = 125, DEL Start Word = 1025

5.76

5.77

5.78

5.79

5.80

5.81

5.82

5.83

5.84

5.85

5.86

0.005

0.010

TIME (s)

0.015

0.020

NO DELAY

DELAY

Figure 9. Delayed Start of Triangular Burst, PFD = 32 MHz, INT = 181,

FRAC = 0, DEV Offset = 4, DEV Word = 20972, Step Word = 200,

CLK DIV = 10, MOD Divider = 125, DEL Start Word = 1000

5.790

5.792

5.794

5.796

5.798

5.800

5.802

5.804

5.806

5.808

5.810

–0.010

0.010

–0.005

0.005

TIME (s)

Figure 10. Dual Ramp Rate Waveform, PFD = 32 MHz, INT = 181, FRAC = 0,

Ramp1: DEV Offset = 3, DEV Word = 16777, Step Word = 100,

Ramp2: DEV Offset = 3, DEV Word = 20792, Step Word = 80

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