AD9708 Datasheet, PDF (6/16 Pages) Analog Devices – 8-Bit, 100 MSPS TxDAC D/A Converter

AD9708
Typical AC Characterization Curves (AVDD = +5 V or +3 V, DVDD = +5 V or +3 V, 50 ⍀ Doubly Terminated Load,
Single-Ended Output, I_OUTA, I_OUTFS = 20 mA, T_A = +25؇C, unless otherwise noted)
70
THD @ 10MSPS
65
60
THD @ 50MSPS
THD
@ 100MSPS
55
50
SINAD @ 10MSPS
45
SINAD @ 50MSPS
40
0.1
SINAD @ 100MSPS
1
10
100
FREQUENCY – MHz
Figure 3. SINAD/THD vs. f_OUT (AVDD
and DVDD = 5.0 V)
70
THD @ 10MSPS
65
THD
@ 100MSPS
60
THD @ 50MSPS
55
50 _{SINAD @ 10MSPS}
45
SINAD @ 50MSPS
40
0.1
SINAD @ 100MSPS
1
10
100
FREQUENCY – MHz
Figure 4. SINAD/THD vs. f_OUT (Differ-
ential Output, AVDD and DVDD = 5.0 V)
55
I_OUTFS = 20mA
50 _{IOUTFS = 10mA}
45 I_OUTFS = 5mA
40 _{IOUTFS = 2.5mA}
35
30
1
10
100
FREQUENCY – MHz
Figure 5. SINAD vs. I_OUTFS
@ 100 MSPS
70
65 ^{THD @ 10MSPS}
60
THD
@ 100MSPS
THD @ 50MSPS
55
50 _{SINAD @ 10MSPS}
SINAD @ 50MSPS
45
40
0.1
SINAD @ 100MSPS
1
10
100
FREQUENCY – MHz
Figure 6. SINAD/THD vs. f_OUT (AVDD
and DVDD = 3.0 V)
70
THD
65 ^{@ 10MSPS}
60
THD
@ 50MSPS
55
THD @ 100MSPS
50 _{SINAD @ 10MSPS}
SINAD @ 50MSPS
45
40
0.1
SINAD @ 100MSPS
1
10
100
FREQUENCY – MHz
Figure 7. SINAD/THD vs. f_OUT (Differ-
ential Output, AVDD and DVDD = 3.0 V)
52
50 ^IOUTFS ^{= 10mA}
48
I_OUTFS = 20mA
I_OUTFS = 5mA
46
I_OUTFS = 2.5mA
44
42
0.1
1
10
FREQUENCY – MHz
Figure 8. SINAD vs. I_OUTFS
@ 20 MSPS
0
fCLOCK = 25MSPS
fOUT = 7.81MHz
SFDR = +60.7dBc
AMPLITUDE = 0dBFS
–100
START: 0Hz
STOP: 12.5MHz
Figure 9. Single-Tone Spectral Plot
@ 25 MSPS
0
fCLOCK = 125MSPS
fOUT = 27.0MHz
SFDR = +52.7dBc
AMPLITUDE = 0dBc
–100
START: 0Hz
STOP: 62.5MHz
Figure 10. Single-Tone Spectral
Plot @ 125 MSPS
0.6
0.5
0.4
0.3
0.2
0.1
0.0
–0.1
–0.2
TIME – 5ns/Div
Figure 11. Step Response
–6–
REV. B