Rainbow Electronics MAX1211 - Manual (Page 13)

MAX1211
65Msps, 12-Bit, IF Sampling ADC
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61
64
63
62
65
66
67
68
69
70
71
20 40 30 50 60 70 80
SIGNAL-TO-NOISE RATIO
vs. CLOCK DUTY CYCLE
MAX1211 toc25
CLOCK DUTY CYCLE (%)
SNR (dB)
SINGLE-ENDED CLOCK
f
IN = 32.1271954MHz
DCE = HIGH
DCE = LOW
61
64
63
62
65
66
67
68
69
70
71
20 40 30 50 60 70 80
SIGNAL-TO-NOISE + DISTORTION
vs. CLOCK DUTY CYCLE
MAX1211 toc26
CLOCK DUTY CYCLE (%)
SINAD (dB)
SINGLE-ENDED CLOCK
f
IN = 32.1271954MHz
DCE = HIGH
DCE = LOW
-100
-90
-95
-80
-85
-70
-75
-65
20 40 50 30 60 70 80
TOTAL HARMONIC DISTORTION
vs. CLOCK DUTY CYCLE
MAX1211 toc27
CLOCK DUTY CYCLE (%)
THD (dBc)
DCE = LOW
DCE = HIGH
SINGLE-ENDED CLOCK
f
IN = 32.1271954MHz
65
75
70
85
80
95
90
100
20 40 50 30 60 70 80
SPURIOUS-FREE DYNAMIC RANGE
vs. CLOCK DUTY CYCLE
MAX1211 toc28
CLOCK DUTY CYCLE (%)
SFDR (dBc)
DCE = LOW
DCE = HIGH
SINGLE-ENDED CLOCK
f
IN = 32.1271954MHz
Typical Operating Characteristics (continued)
(V
DD
= 3.3V, OV
DD
= 2.0V, GND = 0, REFIN = REFOUT (internal reference), C
REFOUT
= 0.1µF, C
L
≈ 5pF at digital outputs, differential
input at -0.5dBFS, DCE = high, CLKTYP = high, PD = low, G/T = low, f CLK
≈ 65MHz (50% duty cycle), C
REFP = C REFN = 0.1µF to GND,
1µF in parallel with 10µF between REFP and REFN, C COM = 0.1µF in parallel with 2.2µF to GND, T A = +25°C, unless otherwise noted.)