Analog Devices AD9912 specifications DDS Run at 200 Msps for 10 MHz Plot

AD9912

	–100
(dBc/Hz)NOISE	–110
	–120
PHASE	–130
	–140
	–150
	100

RMS JITTER (100Hz TO 100MHz): 600MHz: 585fs

800MHz: 406fs

800MHz

600MHz

1k 10k 100k 1M 10M 100M

FREQUENCY OFFSET (Hz)

06763-015

	800
		TOTAL
	700	3.3V
		1.8V
(mW)	600
DISSIPATION	500
	400
	300
POWER
	200
	100
	0							-018
	250	375	500	625	750	875	1000
								06763
			SYSTEM CLOCK FREQUENCY (MHz)

Figure 15. Absolute Phase Noise Using HSTL Driver,

SYSCLK = 1 GHz Wenzel Oscillator (SYSCLK PLL Bypassed),

HSTL Output Doubler Enabled

	–110			RMS JITTER (100Hz TO 20MHz):
				150MHz: 308fs
	–120			50MHz:	737fs
(dBc/Hz)NOISE
	–130
PHASE	–140
						150MHz
	–150					50MHz
						10MHz
	–160							-016
	100	1k	10k	100k	1M	10M	100M
								06763
			FREQUENCY OFFSET (Hz)

Figure 16. Absolute Phase Noise Using CMOS Driver at 3.3 V, SYSCLK = 1 GHz Wenzel Oscillator (SYSCLK PLL Bypassed)

DDS Run at 200 MSPS for 10 MHz Plot

Figure 18. Power Dissipation vs. System Clock Frequency

(SYSCLK PLL Bypassed), fOUT = fSYSCLK/5, HSTL Driver On, CMOS Driver On,

SpurKiller Off

	800
	700
(mW)	600
DISSIPATION	500
	400
	300				TOTAL
POWER
					3.3V
					1.8V
	200
	100
	0					-019
	0	100	200	300	400
						06763
		OUTPUT FREQUENCY (MHz)

Figure 19. Power Dissipation vs. Output Frequency

SYSCLK = 1 GHz (SYSCLK PLL Bypassed), HSTL Driver On,

CMOS Driver On, SpurKiller Off

	–110
(dBc/Hz)NOISE	–120
	–130
PHASE	–140
	–150
	–160
	100

RMS JITTER (100Hz TO 20MHz): 50MHz: 790fs

				50MHz
				10MHz
1k	10k	100k	1M	10M	100M
	FREQUENCY OFFSET (Hz)

06763-017

	10	CARRIER:
	0			399MHz
		SFDR W/O SPURKILLER:		–63.7dBc
	–10	SFDR WITH SPURKILLER: –69.3dBc
		FREQUENCY SPAN:		500MHz
(dBm)	–20	RESOLUTION BW:		3kHz
		VIDEO BW:		30kHz
	–30		THESE TWO SPURS
POWER	–50
	–40
SIGNAL			ELIMINATED WITH
	–60		SPURKILLER
	–70
	–80
	–90
	–100						-020
	0	100	200	300	400	500
							06763
			FREQUENCY (MHz)

Figure 17. Absolute Phase Noise Using CMOS Driver at 1.8 V, SYSCLK = 1 GHz Wenzel Oscillator (SYSCLK PLL Bypassed)

Figure 20. SFDR Comparison With and Without SpurKiller,

SYSCLK = 1 GHz, fOUT = 400 MHz

Rev. D Page 12 of 40