Datasheet

AD9260
Rev. C | Page 14 of 44
TYPICAL PERFORMANCE CHARACTERISTICS
AVDD = DVDD = DRVDD = +5.0 V, 4 V Input Span, Differential DC Coupled Input with CML = 2.0 V, f
CLOCK
= 20 MSPS, Full Bias.
–120
–100
–80
–60
–40
–20
0
dB BELOW FULL SCALE
0.4 0.60 0.2 0.8 1.0 1.2
FREQUENCY (MHz)
00581-C-011
100kHz INPUT
20MHz CLOCK
8 × DECIMATION
THD: –96dB
Figure 11. Spectral Plot of the AD9260 at 100 kHz Input, 20 MHz Clock,
8x OSR (2.5 MHz Output Data Rate)
–120
–100
–80
–60
–40
–20
0
dB BELOW FULL SCALE
0 0.5 1.0 1.5 2.0 2.5
FREQUENCY (MHz)
00581-C-012
100kHz INPUT
20MHz CLOCK
4 × DECIMATION
THD: –98dB
Figure 12. Spectral Plot of the AD9260 at 100 kHz Input, 20 MHz Clock,
4x OSR (5 MHz Output Data Rate)
–120
–100
–80
–60
–40
–20
0
dB BELOW FULL SCALE
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
FREQUENCY (MHz)
00581-C-013
100kHz INPUT
20MHz CLOCK
2 × DECIMATION
THD: –98dB
Figure 13. Spectral Plot of the AD9260 at 100 kHz Input, 20 MHz Clock,
2x OSR (10 MHz Output Data Rate)
–120
–100
–80
–60
–40
–20
0
dB BELOW FULL SCALE
012345678910
FREQUENCY (MHz)
00581-C-014
100kHz INPUT
20MHz CLOCK
1 × DECIMATION
THD: –98dB
Figure 14. Spectral Plot of the AD9260 at 100 kHz Input, 20 MHz Clock,
Undecimated (20 MHz Output Data Rate)
90
94
98
102
106
110
WORST CASE SPUR (dBFS)
0 0.2 0.4 0.6 0.8 1.0
FREQUENCY (MHz)
00581-C-015
–12dBFS/TONE
–26dBFS/TONE
–46dBFS/TONE
–6.5dBFS/TONE
Figure 15. Dual-Tone SFDR vs. Input Frequency (F
1
= F
2
, Span = 10% Center
Frequency, Mode = 8x)
–120
–100
–80
–60
–40
–20
0
dB BELOW FULL SCALE
0.4 0.60 0.2 0.8 1.0 1.2
FREQUENCY (MHz)
00581-C-016
DUAL-TONE TEST
f1 = 1.0MHz
f2 = 975kHz
20MHz CLOCK
8 × DECIMATION
IM3: –94dB
Figure 16. Two-Tone Spectral Performance of the AD9260 Given Inputs at
975 kHz and 1.0 MHz, 20 MHz Clock, 8x Decimation