AD9260
TYPICAL AC CHARACTERIZATION CURVES
AVDD = DVDD = DRVDD = +5 V, 4 V Input Span, AIN = –0.5 dBFS, Differential DC Coupled Input with CML = 2 V.
100
–60
95
FULL BIAS
–65
90
–70
85
80
HALF BIAS
–75
FIN = 1MHz, 2 × MODE
75
–80
70
QUARTER BIAS
65
60
55
50
0
5
10
15
20
CLOCK FREQUENCY (MHz)
Figure 47. SFDR vs. Clock Rate (fIN = 100 kHz in 8x Mode)
100
FULL BIAS
80
HALF BIAS
60
QUARTER BIAS
40
–85
–90
FIN = 100kHz, 8 × MODE
–95
–100
1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0
COMMON MODE INPUT LEVEL (V)
Figure 50. THD vs. Common-Mode Input Level (CML)
–40
–50
FS = 20MHz
–60
FS = 10MHz
–70
FS = 5MHz
20
–80
0
5
10
15
20
25
CLOCK FREQUENCY (MHz)
Figure 48. SFDR vs. Clock Rate (fIN = 500 kHz in 4x Mode)
100
FULL BIAS
80
60
HALF BIAS
40
QUARTER BIAS
20
0
5
10
15
20
25
CLOCK FREQUENCY (MHz)
Figure 49. SFDR vs. Clock Rate (fIN = 1.0 MHz in 2x Mode)
–90
1k
10k
100k
1M
10M
100M
INPUT FREQUENCY (Hz)
Figure 51. CMR vs. Input Frequency (VCML = 2 V p-p, 1x Mode)
100
95
4V SPAN SFDR-2 × MODE
90
4V SPAN SNR-8 × MODE
85
1.6V SPAN SNR-8 × MODE
80
1.6V SPAN SFDR-2 × MODE
75
0
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
FREQUENCY (MHz)
Figure 52. 4 V vs. 1.6 V Span SNR/SFDR (fCLOCK = 20 MSPS)
Rev. C | Page 20 of 44