Datasheet

AD9260
Rev. C | Page 20 of 44
TYPICAL AC CHARACTERIZATION CURVES
AVDD = DVDD = DRVDD = +5 V, 4 V Input Span, A
IN
= –0.5 dBFS, Differential DC Coupled Input with CML = 2 V.
50
55
60
65
70
75
80
85
90
95
100
SFDR (dBFS)
CLOCK FREQUENCY (MHz)
501015
00581-C-047
20
QUARTER BIAS
HALF BIAS
FULL BIAS
Figure 47. SFDR vs. Clock Rate (f
IN
= 100 kHz in 8x Mode)
00581-C-048
FULL BIAS
CLOCK FREQUENCY (MHz)
SFDR (dBFS)
10 15 25
100
5
80
60
40
20
0
20
QUARTER BIAS
HALF BIAS
Figure 48. SFDR vs. Clock Rate (f
IN
= 500 kHz in 4x Mode)
00581-C-049
FULL BIAS
CLOCK FREQUENCY (MHz)
SFDR (dBFS)
10 15 25
100
5
80
60
40
20
0
20
QUARTER BIAS
HALF BIAS
Figure 49. SFDR vs. Clock Rate (f
IN
= 1.0 MHz in 2x Mode)
–100
–95
–90
–85
–80
–75
THD (dBc)
–70
–65
–60
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)
00581-C-050
F
IN
= 100kHz, 8 × MODE
F
IN
= 1MHz, 2 × MODE
Figure 50. THD vs. Common-Mode Input Level (CML)
–90
–80
–70
–60
–50
–40
CMR (dB)
1k 10k 100k 1M 10M 100M
INPUT FREQUENCY (Hz)
00581-C-051
F
S
= 5MHz
F
S
= 10MHz
F
S
= 20MHz
Figure 51. CMR vs. Input Frequency (V
CML
= 2 V p-p, 1x Mode)
75
80
85
90
95
100
SFDR (dBFS)
0.80.60.2 0.401.01.21.
FREQUENCY (MHz)
00581-C-052
41.6
4V SPAN SNR-8 × MODE
1.6V SPAN SNR-8 × MODE
4V SPAN SFDR-2 × MODE
1.6V SPAN SFDR-2 × MODE
Figure 52. 4 V vs. 1.6 V Span SNR/SFDR (f
CLOCK
= 20 MSPS)