EVAL-ADF4158EB1Z Просмотр технического описания (PDF) - Analog Devices

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Компоненты Описание

производитель

EVAL-ADF4158EB1Z

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

Analog Devices 

ADF4158

TYPICAL PERFORMANCE CHARACTERISTICS

–40

–60

–80

–100

–120

–140

–160

1k

10k

100k

1M

10M

FREQUENCY OFFSET (Hz)

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

5.86

5.85

5.84

5.83

5.82

5.81

5.80

5.79

5.78

–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

5.87

5.85

5.83

5.81

5.79

5.77

5.75

–0.010

–0.005

0

TIME (s)

0.005

0.010

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

5.87

5.86

5.85

5.84

5.83

5.82

5.81

5.80

5.79

5.78

5.77

5.76

–0.010

–0.005

0

TIME (s)

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

5.86

NO DELAY

5.85

DELAY

5.84

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5.82

5.81

5.80

5.79

5.78

5.77

5.76

0

0.005

0.010

TIME (s)

0.015

0.020

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

5.810

5.808

5.806

5.804

5.802

5.800

5.798

5.796

5.794

5.792

5.790

–0.010

–0.005

0

TIME (s)

0.005

0.010

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

Rev. 0 | Page 8 of 36

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