Typical operating characteristics (continued) – Maxim Integrated MAX12557 User Manual
Page 8
MAX12557
Dual, 65Msps, 14-Bit, IF/Baseband ADC
8
_______________________________________________________________________________________
-2.0
-1.0
-1.5
0
-0.5
0.5
1.0
1.5
2.0
0
4096 6144
2048
8192 10240 12288 14336 16384
INTEGRAL NONLINEARITY
vs. DIGITAL OUTPUT CODE
(4,194,304-POINT DATA RECORD)
MAX12557 toc07
DIGITAL OUTPUT CODE
INL (LSB)
f
IN
= 3.00123MHz
-1.00
-0.50
-0.75
0
-0.25
0.25
0.50
0.75
1.00
0
4096 6144
2048
8192 10240 12288 14336 16384
DIFFERENTIAL NONLINEARITY
vs. DIGITAL OUTPUT CODE
(4,194,304-POINT DATA RECORD)
MAX12557 toc08
DIGITAL OUTPUT CODE
DNL (LSB)
f
IN
= 3.00123MHz
40
50
45
60
55
65
70
75
80
0
100 150
50
200 250 300 350 400
SNR, SINAD vs. ANALOG INPUT FREQUENCY
(f
CLK
= 65.00352MHz, A
IN
= -0.5dBFS)
MAX12557 toc09
f
IN
(MHz)
SNR, SINAD (dB)
SNR
SINAD
50
60
55
75
70
65
90
85
80
95
0
150 200
50
100
250 300 350 400
-THD, SFDR vs. ANALOG INPUT FREQUENCY
(f
CLK
= 65.00352MHz, A
IN
= -0.5dBFS)
MAX12557 toc10
f
IN
(MHz)
-THD, SFDR (dBc)
SFDR
-THD
20
40
30
60
50
70
80
-55
-45 -40 -35
-50
-30 -25 -20 -15 -10 -5
0
MAX12557 toc11
A
IN
(dBFS)
SNR, SINAD (dB)
SNR, SINAD vs. ANALOG INPUT AMPLITUDE
(f
CLK
= 65.00352MHz, f
IN
= 70MHz)
SINAD
SNR
35
55
45
75
65
85
95
-55
-45 -40 -35
-50
-30 -25 -20 -15 -10 -5
0
MAX12557 toc12
A
IN
(dBFS)
-THD, SFDR (dBc)
-THD, SFDR vs. ANALOG INPUT AMPLITUDE
(f
CLK
= 65.00352MHz, f
IN
= 70MHz)
-THD
SFDR
FFT PLOT (32,768-POINT DATA RECORD)
MAX12557 toc04
ANALOG INPUT FREQUENCY (MHz)
AMPLITUDE (dBFS)
-100
-80
-60
-40
-20
0
-120
f
CLK
= 65.00352MHz
f
IN
= 174.98857MHz
A
IN
= -0.476dBFS
SNR = 72.37dB
SINAD = 70.48dB
THD = -75.62dBc
SFDR = 76.37dBc
HD2
-10
-30
-50
-70
-90
-110
HD3
30
25
15
20
10
5
0
TWO-TONE IMD PLOT
(16,384-POINT DATA RECORD)
MAX12557 toc05
ANALOG INPUT FREQUENCY (MHz)
AMPLITUDE (dBFS)
-100
-80
-60
-40
-20
0
-120
f
CLK
= 65.00352MHz
f
IN1
= 68.49987MHz
A
IN1
= -6.97dBFS
f
IN2
= 71.49930dB
A
IN2
= -6.99dBFS
IM3 = -91.54dBc
IMD = -87.97dBc
-10
-30
-50
-70
-90
-110
HD3
2f
IN2
+ f
IN1
2f
IN1
+ f
IN2
f
IN2
f
IN1
30
25
15
20
10
5
0
TWO-TONE IMD PLOT
(16,384-POINT DATA RECORD)
MAX12557 toc06
ANALOG INPUT FREQUENCY (MHz)
AMPLITUDE (dBFS)
-100
-80
-60
-40
-20
0
-120
f
CLK
= 65.00352MHz
f
IN1
= 172.49995MHz
A
IN1
= -6.95dBFS
f
IN2
= 177.49900688MHz
A
IN2
= -6.97dBFS
IM3 = -87.61dBc
IMD = -82.37dBc
-10
-30
-50
-70
-90
-110
HD3
f
IN1
+ f
IN2
f
IN1
f
IN2
HD2
30
25
15
20
10
5
0
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.)