Maxim Integrated MAX12557 - Manual (Page 9)

MAX12557
Dual, 65Msps, 14-Bit, IF/Baseband ADC
_______________________________________________________________________________________ 9
20
40
30
60
50
70
80
-55 -45 -40 -35 -50 -30 -25 -20 -15 -10 -5 0
MAX12557 toc13
A IN (dBFS)
SNR, SINAD (dB)
SNR, SINAD vs. ANALOG INPUT AMPLITUDE
(f CLK = 65.00352MHz, f IN = 175MHz)
SINAD
SNR
35
55
45
75
65
85
95
-55 -45 -40 -35 -50 -30 -25 -20 -15 -10 -5 0
MAX12557 toc14
A IN (dBFS)
-THD, SFDR (dBc)
-THD, SFDR vs. ANALOG INPUT AMPLITUDE
(f CLK = 65.00352MHz, f IN = 175MHz)
-THD
SFDR
60
64
68
72
76
80
20 35 40 25 30 45 50 55 60 65
SNR, SINAD vs. CLOCK SPEED
(f
IN = 70MHz, A IN = -0.5dBFS)
MAX12557 toc15
f CLK (MHz)
SNR, SINAD (dB)
SNR
SINAD
60
70
75
80
85
90
20 35 40 25 30 45 50 55 60 65
-THD, SFDR vs. CLOCK SPEED
(f
IN = 70MHz, A IN = -0.5dBFS)
MAX12557 toc16
f CLK (MHz)
-THD, SFDR (dBc)
SFDR
-THD
65
60
64
68
72
76
80
20 35 40 25 30 45 50 55 60 65
SNR, SINAD vs. CLOCK SPEED
(f IN = 175MHz, A IN = -0.5dBFS)
MAX12557 toc17
f CLK (MHz)
SNR, SINAD (dB)
SNR
SINAD
60
70
75
80
85
90
20 35 40 25 30 45 50 55 60 65
-THD, SFDR vs. CLOCK SPEED
(f IN = 175MHz, A IN = -0.5dBFS)
MAX12557 toc18
f CLK (MHz)
-THD, SFDR (dBc)
-THD
65
SFDR
60
64
72
68
76
80
3.0 3.2 3.1 3.3 3.4 3.5 3.6
SNR, SINAD vs. ANALOG SUPPLY VOLTAGE
(f CLK = 65.00352MHz, f IN = 70MHz)
MAX12557 toc19
V DD (V)
SNR, SINAD (dB)
SNR
SINAD
60
70
65
80
75
90
85
95
3.0 3.2 3.3 3.1 3.4 3.5 3.6
MAX12557 toc20
V DD (V)
-THD, SFDR (dBc)
-THD, SFDR vs. ANALOG SUPPLY VOLTAGE
(f
CLK
= 65.00352MHz, f
IN
= 70MHz)
SFDR
-THD
60
63
69
66
72
75
3.0 3.2 3.1 3.3 3.4 3.5 3.6
SNR, SINAD vs. ANALOG SUPPLY VOLTAGE
(f CLK = 65.00352MHz, f IN = 175MHz)
MAX12557 toc21
V DD (V)
SNR, SINAD (dB)
SNR
SINAD
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.)