MAX19705ETM Просмотр технического описания (PDF) - Maxim Integrated
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MAX19705ETM Datasheet PDF : 37 Pages
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10-Bit, 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), Rx ADC input
amplitude = -0.5dBFS, Tx DAC output amplitude = 0dBFS, differential Rx ADC input, differential Tx 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
Rx ADC SIGNAL-TO-NOISE RATIO
vs. ANALOG INPUT FREQUENCY
56
55
54
53
IA
52
51
50
QA
Rx ADC SIGNAL-TO-NOISE AND DISTORTION
RATIO vs. ANALOG INPUT FREQUENCY
56
55
54
53
IA
52
51
50
QA
-70
49
49
-80
48
48
-90
47
47
-100
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5
FREQUENCY (MHz)
46
0
20
40
60
80 100
ANALOG INPUT FREQUENCY (MHz)
46
0
20
40
60
80
100
ANALOG INPUT FREQUENCY (MHz)
Rx ADC TOTAL HARMONIC DISTORTION
vs. ANALOG INPUT FREQUENCY
-60
-65
IA
-70
-75
QA
-80
Rx ADC SPURIOUS-FREE DYNAMIC RANGE
vs. ANALOG INPUT FREQUENCY
85
80
QA
75
IA
70
Rx ADC SIGNAL-TO-NOISE RATIO
vs. ANALOG INPUT AMPLITUDE
60
fIN = 1.8063354MHz
QA
50
40
IA
30
-85
0
20
40
60
80
100
ANALOG INPUT FREQUENCY (MHz)
Rx ADC SIGNAL-TO-NOISE AND DISTORTION
RATIO vs. ANALOG INPUT AMPLITUDE
60
fIN = 1.8063354MHz
QA
50
IA
40
65
0
20
40
60
80 100
ANALOG INPUT FREQUENCY (MHz)
Rx ADC SPURIOUS-FREE DYNAMIC RANGE
vs. ANALOG INPUT AMPLITUDE
80
fIN = 1.8063354MHz
75
QA
70
IA
65
20
-21 -18 -15 -12 -9 -6 -3 0
ANALOG INPUT AMPLITUDE (dBFS)
Rx ADC SIGNAL-TO-NOISE RATIO
vs. SAMPLING RATE
57
fIN = 1.8063354MHz
56
IA
55
54
60
53
QA
30
55
52
20
-21 -18 -15 -12 -9 -6 -3 0
ANALOG INPUT AMPLITUDE (dBFS)
50
-21 -18 -15 -12 -9 -6 -3 0
ANALOG INPUT AMPLITUDE (dBFS)
51
1.5 2.5 3.5 4.5 5.5 6.5 7.5
SAMPLING RATE (MHz)
10 ______________________________________________________________________________________
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