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Московский технический университет связи и информатики

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Формирование и первичная обработка звуковых и видео сигналов

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ADS6125, ADS6124

ADS6123, ADS6122

www.ti.com

SLAS560A–OCTOBER 2007–REVISED MARCH 2008

TYPICAL CHARACTERISTICS - ADS6123 (FS= 80 MSPS)

All plots are at 25°C, AVDD = DRVDD = 3.3 V, maximum rated sampling frequency, sine wave input clock, 1.5 VPP differential clock amplitude, 50% clock duty cycle, –1 dBFS differential analog input, internal reference mode, 0 dB gain, CMOS output interface (unless otherwise noted)

Amplitude − dB

−20

−40

−60

−80

−100

−120

−140

−160

FFT for 20 MHz INPUT SIGNAL

SFDR = 89.34 dBc

SINAD = 71.57 dBFS

SNR = 71.74 dBFS

THD = 86.63 dBc

f − Frequency − MHz

G037

Figure 44.

Amplitude − dB

−20

−40

−60

−80

−100

−120

−140

−160

FFT for 70 MHz INPUT SIGNAL

SFDR = 83.43 dBc

SINAD = 71.03 dBFS

SNR = 71.49 dBFS

THD = 82.65 dBc

f − Frequency − MHz

G038

Figure 45.

Amplitude − dB

−20

−40

−60

−80

−100

−120

−140

−160

FFT for 230 MHz INPUT SIGNAL

INTERMODULATION DISTORTION (IMD) vs FREQUENCY

			SFDR = 81.4 dBc		0	fIN1 = 190.1 MHz, ±7 dBFS
			SFDR = 81.4 dBc			fIN1 = 190.1 MHz, ±7 dBFS
			SINAD = 69 dBFS		−20	fIN2 = 185.3 MHz, ±7 dBFS
			SNR = 69.7 dBFS			2-Tone IMD = ±84.1 dBFS
			THD = 78 dBc		−40	SFDR = ±89.5 dBFS
				− dB	−60
				Amplitude	−80
					−80
					−100
					−120
					−140
					−160
0	10	20	30	40	0	10	20	30	40
		f − Frequency − MHz		G039		f − Frequency − MHz			G040
				G039					G040

Figure 46.	Figure 47.
SFDR vs INPUT FREQUENCY	SNR vs INPUT FREQUENCY

	100											76
	96											74
	92											74
	92
	88				Gain = 3.5 dB						dBFS	72
− dBc	84				Gain = 3.5 dB
	84											70
												70
	80
SFDR	80										SNR −
	76		Gain = 0 dB									68
	76

	72											66
	68											64
	64											64
	64
	60											62
	0	50	100	150	200	250	300	350	400	450	500
				fIN − Input Frequency − MHz							G041
											G041

					Gain = 0 dB
		Gain = 3.5 dB
0	50	100	150	200	250	300	350	400	450	500
			fIN − Input Frequency − MHz							G042
										G042

Figure 48.

Figure 49.

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ADS6125, ADS6124

ADS6123, ADS6122

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SLAS560A–OCTOBER 2007–REVISED MARCH 2008

TYPICAL CHARACTERISTICS - ADS6123 (FS= 80 MSPS) (continued)

SFDR vs INPUT FREQUENCY (LVDS interface)

SNR vs INPUT FREQUENCY (LVDS interface)

	100											76
	96											74
	92											74
	92
	88					Gain = 3.5 dB					dBFS	72
− dBc						Gain = 3.5 dB
	84											70
												70
	80
SFDR	80										SNR −
	76			Gain = 0 dB								68
	76

	72											66
	68											64
	64											64
	64
	60											62
	0	50	100	150	200	250	300	350	400	450	500
				fIN − Input Frequency − MHz							G043
											G043

					Gain = 0 dB
		Gain = 3.5 dB
0	50	100	150	200	250	300	350	400	450	500
			fIN − Input Frequency − MHz							G044
										G044

Figure 50.	Figure 51.
SFDR vs INPUT FREQUENCY ACROSS GAINS	SINAD vs INPUT FREQUENCY ACROSS GAINS

	95						74
			Input adjusted to get −1dBFS input				72
	90						72
	90			3 dB
				3 dB			70
	85			2 dB	6 dB		70
	85					dBFS
dBc							68
	80						68
	80
−					5 dB	−	66
SFDR		0 dB			5 dB	SINAD
	75	0 dB	1 dB		4 dB
					4 dB
							64
							64

	70						62
							62
	65						60
							60
	60						58
	0	100	200	300	400	500
			fIN − Input Frequency − MHz			G045
						G045

		0 dB	Input adjusted to get −1dBFS input
		0 dB
			1 dB
				2 dB
				3 dB
	4 dB	5 dB		6 dB
0	100		200	300	400	500
		fIN − Input Frequency − MHz				G046
						G046

Figure 52.

Figure 53.

SFDR − dBc

PERFORMANCE vs AVDD

PERFORMANCE vs DRVDD

88						78			102										74
86	fIN = 70.1 MHz					77			100		fIN = 10.1 MHz								73
86	DRVDD = 3.3 V			SFDR		77			100		AVDD = 3.3 V				SNR				73
84						76									SNR
84						76			98										72
							dBFS	dBc−	98										72	dBFS
82						75	dBFS	dBc−	96										71	dBFS
82						75

80						74	SNR−	SFDR	94				SFDR						70	SNR−
78						73	SNR−	SFDR					SFDR							SNR−

76			SNR			72			92										69
76			SNR			72
74						71			90										68
74						71
72						70			88										67
3.0	3.1	3.2	3.3	3.4	3.5	3.6				1.8	2.0	2.2	2.4	2.6	2.8	3.0	3.2	3.4	3.6
	AV		− Supply V oltage − V									DRVDD − Supply V oltage − V								G048
		DD					G047													G048
							G047

Figure 54.

Figure 55.

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ADS6125, ADS6124

ADS6123, ADS6122

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SLAS560A–OCTOBER 2007–REVISED MARCH 2008

TYPICAL CHARACTERISTICS - ADS6123 (FS= 80 MSPS) (continued)

PERFORMANCE vs TEMPERATURE

PERFORMANCE vs INPUT AMPLITUDE

	99						74			110						90
										100						85
	97			SFDR			73			90		SFDR (dBFS)				80
												SFDR (dBFS)
dBc−SFDR								dBFS−SNR	dBFSdBc,−SFDR								dBFS−SNR
dBc−SFDR	95						72	dBFS−SNR	dBFSdBc,−SFDR	80						75	dBFS−SNR
										80						75
				SNR
				SNR						70						70
										70		SNR (dBFS)				70
												SNR (dBFS)
	93						71			60						65
										60						65
	91						70			50	SFDR (dBc)					60
											SFDR (dBc)

		fIN = 10.1 MHz								40						55
		fIN = 10.1 MHz													fIN = 20 MHz
	89						69			30					fIN = 20 MHz
	89						69			30						50
	−40	−20	0	20	40	60	80			−60	−50	−40	−30	−20	−10	0
				T − T emperature − °C				G049				Input Amplitude − dBFS					G050
								G049									G050

Figure 56.

Figure 57.

SFDR − dBc

PERFORMANCE vs CLOCK AMPLITUDE

PERFORMANCE vs INPUT CLOCK DUTY CYCLE

SNR

88	SFDR

fIN = 20.1 MHz

0.5	1.0	1.5	2.0	2.5
		Input Clock Amplitude − V PP

Figure 58.

72.0			98		fIN = 10.1 MHz							72.0
71.5			96		fIN = 10.1 MHz			SFDR				71.5
71.5			96					SFDR				71.5
71.0			94									71.0
70.5	dBFS	− dBc	92					SNR				70.5	dBFS
70.0	dBFS	− dBc	90									70.0	dBFS
70.0	SNR −	SFDR	90									70.0	SNR −
69.5	SNR −	SFDR	88									69.5	SNR −
69.0			86									69.0
68.5			84									68.5
68.0			82									68.0
3.0				30	35	40	45	50	55	60	65	70
	G051						Input Clock Duty Cycle − %						G052
	G051												G052

Figure 59.

PERFORMANCE IN EXTERNAL REFERENCE MODE

	92	fIN = 20.1 MHz							78
		fIN = 20.1 MHz
		External Reference Mode
	90					SFDR			76
						SFDR
− dBc	88								74	dBFS
− dBc										dBFS
SFDR	86			SNR					72	SNR −
SFDR										SNR −
	84								70
	82								68
	1.30	1.35	1.40	1.45	1.50	1.55	1.60	1.65	1.70
				VVCM − VCM V oltage − V						G054
										G054

Figure 60.

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Product Folder Link(s): ADS6125, ADS6124 ADS6123, ADS6122

ADS6125, ADS6124

ADS6123, ADS6122

www.ti.com

SLAS560A–OCTOBER 2007–REVISED MARCH 2008

TYPICAL CHARACTERISTICS - ADS6122 (FS= 65 MSPS)

Amplitude − dB

0	FFT for 20 MHz INPUT SIGNAL				0	FFT for 90 MHz INPUT SIGNAL
0	SFDR = 91.8 dBc				0	SFDR = 83 dBc
	SFDR = 91.8 dBc					SFDR = 83 dBc
−20	SINAD = 71.1 dBFS				−20	SINAD = 71.1 dBFS
	SNR = 71.8 dBFS					SNR = 71.6 dBFS
−40	THD = 89.8 dBc				−40	THD = 82.3 dBc
−60				− dB	−60
−80				Amplitude	−80
−80					−80
−100					−100
−120					−120
−140					−140
−160					−160
0	10	20	30		0	10	20	30
	f − Frequency − MHz		G055			f − Frequency − MHz		G056
			G055					G056
		Figure 61.					Figure 62.
	FFT for 230 MHz INPUT SIGNAL				INTERMODULATION DISTORTION (IMD) vs FREQUENCY

0	SFDR = 82.8 dBc				0		fIN1 = 190.1 MHz, ±7 dBFS
	SFDR = 82.8 dBc						fIN1 = 190.1 MHz, ±7 dBFS
−20	SINAD = 69.5 dBFS				−20		fIN2 = 185.3 MHz, ±7 dBFS
	SNR = 70.1 dBFS						2-Tone IMD = ±88.5 dBFS
−40	THD = 79.6 dBc				−40		SFDR = ±91.9 dBFS
−60				− dB	−60
−80				Amplitude	−80
−80					−80
−100					−100
−120					−120
−140					−140
−160					−160
0	10	20	30		0	10	20	30
	f − Frequency − MHz		G057			f − Frequency − MHz		G058
			G057					G058

Figure 63.	Figure 64.
SFDR vs INPUT FREQUENCY	SNR vs INPUT FREQUENCY

	100											76
	96											74
	92											74
	92
	88					Gain = 3.5 dB					dBFS	72
− dBc						Gain = 3.5 dB
	84											70
												70
	80
SFDR	80										SNR −
	76			Gain = 0 dB								68
	76			Gain = 0 dB
	72											66
	68											64
	64											64
	64
	60											62
	0	50	100	150	200	250	300	350	400	450	500
				fIN − Input Frequency − MHz							G059
											G059

					Gain = 0 dB
			Gain = 3.5 dB
0	50	100	150	200	250	300	350	400	450	500
			fIN − Input Frequency − MHz							G060
										G060

Figure 65.

Figure 66.

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Product Folder Link(s): ADS6125, ADS6124 ADS6123, ADS6122

ADS6125, ADS6124

ADS6123, ADS6122

www.ti.com

SLAS560A–OCTOBER 2007–REVISED MARCH 2008

TYPICAL CHARACTERISTICS - ADS6122 (FS= 65 MSPS) (continued)

SFDR vs INPUT FREQUENCY (LVDS interface)

SNR vs INPUT FREQUENCY (LVDS interface)

	100											76
	96											74
	92											74
	92
− dBc	88					Gain = 3.5 dB					dBFS	72
	84											70
												70
	80
SFDR	80										SNR −
	76			Gain = 0 dB								68
	76			Gain = 0 dB
	72											66
	68											64
	64											64
	64
	60											62
	0	50	100	150	200	250	300	350	400	450	500
				fIN − Input Frequency − MHz							G061
											G061

					Gain = 0 dB
		Gain = 3.5 dB
0	50	100	150	200	250	300	350	400	450	500
			fIN − Input Frequency − MHz							G062
										G062

Figure 67.	Figure 68.
SFDR vs INPUT FREQUENCY ACROSS GAINS	SINAD vs INPUT FREQUENCY ACROSS GAINS

	95						76
			Input adjusted to get −1dBFS input				74
	90						74
	90
	85			3 dB			72
	85					− dBFS
− dBc	80				6 dB		70
		1 dB			6 dB

							68
SFDR		0 dB			5 dB	SINAD	68
	75	0 dB

			2 dB				66
			2 dB				66

	70						64
							64
	65				4 dB		62
							62
	60						60
	0	100	200	300	400	500
			fIN − Input Frequency − MHz			G063
						G063

		Input adjusted to get −1dBFS input
		0 dB	2 dB
			1 dB
	3 dB
	4 dB	5 dB	6 dB
0	100	200	300	400	500
	fIN	− Input Frequency − MHz			G064

Figure 69.	Figure 70.
PERFORMANCE vs AVDD	PERFORMANCE vs DRVDD

	96						77			106										75
	94	fIN = 70.1 MHz					76			104		fIN = 10.1 MHz								74
	94	DRVDD = 3.3 V					76			104		AVDD = 3.3 V								74
	92			SFDR			75			102										73
				SFDR						102										73
− dBc	90						74	dBFS	− dBc						SNR						dBFS
	90						74			100										72
										100										72
	88						73
SFDR	88						73	SNR −	SFDR												SNR −
	86			SNR			72			98					SFDR					71
	86			SNR			72								SFDR
	84						71			96										70
	84						71
	82						70			94										69
	82						70
	80						69			92										68
	3.0	3.1	3.2	3.3	3.4	3.5	3.6				1.8	2.0	2.2	2.4	2.6	2.8	3.0	3.2	3.4	3.6
		AVDD − Supply V oltage − V						G065					DRVDD − Supply V oltage − V								G066
								G065													G066
				Figure 71.											Figure 72.

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ADS6125, ADS6124

ADS6123, ADS6122

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SLAS560A–OCTOBER 2007–REVISED MARCH 2008

TYPICAL CHARACTERISTICS - ADS6122 (FS= 65 MSPS) (continued)

PERFORMANCE vs TEMPERATURE

PERFORMANCE vs INPUT AMPLITUDE

	98
		fIN = 10.1 MHz
	96
	94			SFDR
− dBc	94
− dBc	92
SFDR	92
SFDR	90		SNR
	90		SNR
	88
	86
	−40	−20	0	20	40	60	80
				T − T emperature − °C

76			110						90
75			100	SFDR (dBFS)					85
75
		dBc, dBFS	90						80
74	− dBFS		80		SNR (dBFS)				75	− dBFS
					SNR (dBFS)

73			70						70

72	SNR	SFDR −	60						65	SNR
72				SFDR (dBc)
			50	SFDR (dBc)					60


71			40						55
			40						55
70			30					fIN = 20.1 MHz
70			30						50
			−60	−50	−40	−30	−20	−10	0
	G067				Input Amplitude − dBFS					G068
	G067									G068

Figure 73.	Figure 74.
PERFORMANCE vs CLOCK AMPLITUDE	PERFORMANCE vs INPUT CLOCK DUTY CYCLE

	96					72.0			96
	94			SNR		71.5			94
				SNR
	92					71.0			92
− dBc	90			SFDR		70.5	dBFS	− dBc	90
				SFDR
	88					70.0			88
SFDR	88					70.0	SNR −	SFDR	88
SFDR	86					69.5	SNR −	SFDR	86
	84					69.0			84
	82					68.5			82
	80	fIN = 20.1 MHz				68.0			80
	80					68.0			80
	0.5	1.0	1.5	2.0	2.5	3.0
			Input Clock Amplitude − V PP				G069
							G069

								72.0
			SFDR					71.5
								71.0
				SNR				70.5	− dBFS
				SNR
								70.0
								69.5	SNR
								69.0
	fIN = 10.1 MHz							68.5
	fIN = 10.1 MHz
								68.0
30	35	40	45	50	55	60	65	70
			Input Clock Duty Cycle − %						G070
									G070

Figure 75.

Figure 76.

PERFORMANCE IN EXTERNAL REFERENCE MODE

	95	fIN = 20.1 MHz							78
		fIN = 20.1 MHz
		External Reference Mode
	93								76
− dBc						SFDR				dBFS
	91								74

SFDR	89		SNR						72	SNR −
	89								72

	87								70
	85								68
	1.30	1.35	1.40	1.45	1.50	1.55	1.60	1.65	1.70
				VVCM − VCM V oltage − V						G072
										G072

Figure 77.

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