MAX12557 Datasheet, PDF (8/28 Pages) Maxim Integrated Products – Dual, 65Msps, 14-Bit, IF/Baseband ADC

Dual, 65Msps, 14-Bit, IF/Baseband ADC
Typical Operating Characteristics (continued)
(V_DD = 3.3V, OV_DD = 2.0V, GND = 0, REFIN = REFOUT (internal reference mode), C_L ≈ 5pF at digital outputs, V_IN = -0.5dBFS,
DIFFCLK/SECLK = OV_DD, PD = GND, G/T = GND, f_CLK = 65MHz (50% duty cycle), T_A = +25°C, unless otherwise noted.)
FFT PLOT (32,768-POINT DATA RECORD)
0
-10
f_CLK = 65.00352MHz
f_IN = 174.98857MHz
-20 A_IN = -0.476dBFS
-30 ^{SNR = 72.37dB}
-40
SINAD = 70.48dB
THD = -75.62dBc
-50 _{SFDR = 76.37dBc}
-60
HD2
-70
HD3
-80
-90
-100
-110
-120
0
5 10 15 20 25 30
ANALOG INPUT FREQUENCY (MHz)
TWO-TONE IMD PLOT
(16,384-POINT DATA RECORD)
0
-10
f_CLK = 65.00352MHz
f_IN1 = 68.49987MHz
-20
A_IN1 = -6.97dBFS
-30
-40 _fIN1
f_IN2
f_IN2 = 71.49930dB
A_IN2 = -6.99dBFS
IM3 = -91.54dBc
-50
IMD = -87.97dBc
-60
-70
2f_IN1 + f_IN2 2f_IN2 + f_IN1
-80
HD3
-90
-100
-110
-120
0
5 10 15 20 25 30
ANALOG INPUT FREQUENCY (MHz)
TWO-TONE IMD PLOT
(16,384-POINT DATA RECORD)
0
-10
f_CLK = 65.00352MHz
f_IN1 = 172.49995MHz
-20 _{AIN1 = -6.95dBFS}
-30 ^fIN2 ^{= 177.49900688MHz}
-40
A_IN2 = -6.97dBFS
IM3 = -87.61dBc
-50 _{IMD = -82.37dBc}
f_IN1
-60
-70
-80
HD3
f_IN2
f_IN1 + f_IN2
HD2
-90
-100
-110
-120
0
5 10 15 20 25 30
ANALOG INPUT FREQUENCY (MHz)
INTEGRAL NONLINEARITY
vs. DIGITAL OUTPUT CODE
(4,194,304-POINT DATA RECORD)
2.0
1.5
f_IN = 3.00123MHz
1.0
DIFFERENTIAL NONLINEARITY
vs. DIGITAL OUTPUT CODE
(4,194,304-POINT DATA RECORD)
1.00
f_IN = 3.00123MHz
0.75
0.50
SNR, SINAD vs. ANALOG INPUT FREQUENCY
(f_CLK = 65.00352MHz, A_IN = -0.5dBFS)
80
75
SNR
70
0.5
0.25
0
0
65
60
SINAD
-0.5
-0.25
55
-1.0
-0.50
50
-1.5
-0.75
45
-2.0
0 2048 4096 6144 8192 10240 12288 14336 16384
DIGITAL OUTPUT CODE
-1.00
0 2048 4096 6144 8192 10240 12288 14336 16384
DIGITAL OUTPUT CODE
40
0
50 100 150 200 250 300 350 400
f_IN (MHz)
-THD, SFDR vs. ANALOG INPUT FREQUENCY
(f_CLK = 65.00352MHz, A_IN = -0.5dBFS)
95
90
85
SFDR
80
SNR, SINAD vs. ANALOG INPUT AMPLITUDE
(f_CLK = 65.00352MHz, f_IN = 70MHz)
80
SNR
70
60
-THD, SFDR vs. ANALOG INPUT AMPLITUDE
(f_CLK = 65.00352MHz, f_IN = 70MHz)
95
85
SFDR
75
75
70
65
60
55
50
0
-THD
50 100 150 200 250 300 350 400
f_IN (MHz)
50
SINAD
40
30
20
-55 -50 -45 -40 -35 -30 -25 -20 -15 -10 -5 0
A_IN (dBFS)
65
-THD
55
45
35
-55 -50 -45 -40 -35 -30 -25 -20 -15 -10 -5 0
A_IN (dBFS)
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