MAX12528 查看數據表（PDF） - Maxim Integrated
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MAX12528 Datasheet PDF : 28 Pages
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Dual, 80Msps, 12-Bit, IF/Baseband ADC
Typical Operating Characteristics (continued)
(VDD = 3.3V, OVDD = 2.0V, GND = 0, REFIN = REFOUT (internal reference mode), CL ≈ 5pF at digital outputs, AIN = -0.5dBFS,
DIFFCLK/SECLK = OVDD, PD = GND, G/T = GND, fCLK = 80MHz (50% duty cycle), TA = +25°C, unless otherwise noted.)
FFT PLOT (32,768-POINT DATA RECORD)
0
-10
-20
fIN
-30
-40
-50
-60
-70
fCLK = 80MHz
fIN = 174.9780273MHz
AIN = -0.468dBFS
SNR = 69.5dB
SINAD = 67.9dB
THD = -73.1dBc
SFDR = 75dBc
HD2 = -79.3dBc HD3
HD3 = -75dBc
-80
HD2
-90
-100
-110
-120
0 5 10 15 20 25 30 35 40
ANALOG INPUT FREQUENCY (MHz)
TWO-TONE IMD PLOT
(16,384-POINT DATA RECORD)
0
-20
-40 fIN1
fIN2
-60
fCLK = 65.00352MHz
fIN1 = 68.49889MHz
fIN2 = 71.49832MHz
AIN1 = -6.96dBFS
AIN2 = -7.02dBFS
IM3 = -92.3dBc
IMD = -89.1dBc
2fIN2 + fIN1
-80
-100
-120
0
5 10 15 20 25 30
ANALOG INPUT FREQUENCY (MHz)
TWO-TONE IMD PLOT
(16,384-POINT DATA RECORD)
0
fCLK = 65.00352MHz
fIN1 = 172.50293MHz
-20 AIN1 = -6.99dBFS
fIN2 = 177.40198MHz
-40
AIN2 = -7.01dBFS
IM3 = -88.9dBc
IMD = -82.2dBc
-60
fIN2 - fIN1
fIN2
fIN1
fIN1 + fIN2
-80
-100
-120
0
5 10 15 20 25 30
ANALOG INPUT FREQUENCY (MHz)
INTEGRAL NONLINEARITY
vs. DIGITAL OUTPUT CODE
1.0
fCLK = 80MHz
0.8 fIN = 2.1655273MHz
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
0
512 1024 1536 2048 2560 3072 3584 4096
DIGITAL OUTPUT CODE
-THD, SFDR vs. ANALOG INPUT FREQUENCY
(fCLK = 80MHz, AIN = -0.5dBFS)
90
85
80
SFDR
75
70
65
-THD
60
55
50
0
50 100 150 200 250 300 350 400
fIN (MHz)
DIFFERENTIAL NONLINEARITY
vs. DIGITAL OUTPUT CODE
1.0
fCLK = 80MHz
0.8 fIN = 2.1655273MHz
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
0
512 1024 1536 2048 2560 3072 3584 4096
DIGITAL OUTPUT CODE
SNR, SINAD vs. ANALOG INPUT AMPLITUDE
(fCLK = 80MHz, fIN = 70MHz)
75
SNR
65
55
SINAD
45
35
25
15
-55 -50 -45 -40 -35 -30 -25 -20 -15 -10 -5 0
AIN (dBFS)
SNR, SINAD vs. ANALOG INPUT FREQUENCY
(fCLK = 80MHz, AIN = -0.5dBFS)
72
SNR
70
68
66
64
62
60
SINAD
58
56
54
52
50
0 50 100 150 200 250 300 350 400
fIN (MHz)
-THD, SFDR vs. ANALOG INPUT AMPLITUDE
(fCLK = 80MHz, fIN = 70MHz)
90
80
70
SFDR
60
50
-THD
40
30
20
-55 -50 -45 -40 -35 -30 -25 -20 -15 -10 -5 0
AIN (dBFS)
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