MAX19700 Просмотр технического описания (PDF) - Maxim Integrated
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MAX19700 Datasheet PDF : 32 Pages
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7.5Msps, Ultra-Low-Power
Analog Front-End
Typical Operating Characteristics (continued)
(VDD = 3V, OVDD = 1.8V, internal reference (1.024V), CL ≈ 10pF on all digital outputs, fCLK = 7.5MHz 50% duty cycle, ADC input
amplitude = -0.5dBFS, DAC output amplitude = 0dBFS, differential ADC input, differential DAC output, CREFP = CREFN = CCOM =
0.33µF, TA = +25°C, unless otherwise noted.)
Rx ADC CHANNEL-QA
TWO-TONE FFT PLOT
0
fCLK = 7.5MHz
-10 f1 = 2.0MHz
-20
f2 = 2.1MHz
AQA = -7dBFS
-30 PER TONE
8192-POINT
-40 DATA RECORD
-50
f2
f1
-60
-70
Rx ADC SIGNAL-TO-NOISE RATIO
vs. ANALOG INPUT FREQUENCY
57
55
QA
53
IA
51
49
Rx ADC SIGNAL-TO-NOISE AND DISTORTION
RATIO vs. ANALOG INPUT FREQUENCY
57
55
QA
53
IA
51
49
-80
47
47
-90
-100
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5
FREQUENCY (MHz)
45
0 10 20 30 40 50 60 70 80 90 100
ANALOG INPUT FREQUENCY (MHz)
45
0 10 20 30 40 50 60 70 80 90 100
ANALOG INPUT FREQUENCY (MHz)
Rx ADC TOTAL HARMONIC DISTORTION
vs. ANALOG INPUT FREQUENCY
-66
-68
-70
-72
-74
-76
-78
Rx ADC SPURIOUS-FREE DYNAMIC RANGE
vs. ANALOG INPUT FREQUENCY
79
IA
77
75
73
71
QA
69
67
Rx ADC SIGNAL-TO-NOISE RATIO
vs. ANALOG INPUT AMPLITUDE
60
fIN = 1.9980913MHz
50
IA
40
30
QA
20
10
-80
0 10 20 30 40 50 60 70 80 90 100
ANALOG INPUT FREQUENCY (MHz)
65
0 10 20 30 40 50 60 70 80 90 100
ANALOG INPUT FREQUENCY (MHz)
0
-23
-18
-13
-8
-3
ANALOG INPUT AMPLITUDE (dBFS)
Rx ADC SIGNAL-TO-NOISE AND DISTORTION
RATIO vs. ANALOG INPUT AMPLITUDE
60
fIN = 1.9980913MHz
50
IA
40
30
QA
20
10
0
-23
-18
-13
-8
-3
ANALOG INPUT AMPLITUDE (dBFS)
Rx ADC SPURIOUS-FREE DYNAMIC RANGE
vs. ANALOG INPUT AMPLITUDE
80
fIN = 1.9980913MHz
75
70
IA
65
60
QA
55
50
45
40
-23
-18
-13
-8
-3
ANALOG INPUT AMPLITUDE (dBFS)
Rx ADC SIGNAL-TO-NOISE RATIO
vs. SAMPLING RATE
55.0
IA
54.8
54.6
54.4
QA
54.2
54.0
53.8
53.6
53.4
53.2
fIN = 1.9980913MHz
53.0
2
3
4
5
6
7
SAMPLING RATE (MHz)
10 ______________________________________________________________________________________
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