AD9708
典型交流特性曲线
（ AVDD = 5 V或+3 V ， DVDD = 5 V或+3 V ， 50
单端输出，我
OUTA
, I
OUTFS
能力= 20 mA ，T
A
= 25 ℃，除非另有说明）
70
THD @ 50MSPS
65
SINAD / THD - 分贝
60
55
50
45
40
0.1
THD @ 10MSPS
THD
@ 100MSPS
SINAD / THD - 分贝
65
THD
@ 100MSPS
60
SINAD - 分贝
45
THD @ 50MSPS
55
50
45
40
0.1
70
THD @ 10MSPS
55
双端接负载，
I
OUTFS
= 20mA下
50
I
OUTFS
= 10毫安
I
OUTFS
= 5毫安
40
I
OUTFS
= 2.5毫安
SINAD @ 10MSPS
SINAD @ 50MSPS
SINAD @ 100MSPS
10
1
频率 - 兆赫
100
SINAD @ 10MSPS
SINAD @ 50MSPS
SINAD @ 100MSPS
10
1
频率 - 兆赫
100
30
1
10
频率 - 兆赫
100
35
图3. SINAD / THD主场迎战˚F
OUT
（ AVDD
和DVDD = 5.0 V）
图4. SINAD / THD主场迎战˚F
OUT
（ Differ-
无穷区间输出， AVDD和DVDD = 5.0 V）
图5. SINAD与我
OUTFS
@ 100 MSPS
70
65 THD @ 10MSPS
SINAD / THD - 分贝
60
THD @ 50MSPS
55
50
45
40
0.1
70
65
SINAD / THD - 分贝
60
SINAD - 分贝
THD
@ 10MSPS
THD
@ 50MSPS
52
I
OUTFS
= 20mA下
50 I
OUTFS
= 10毫安
I
OUTFS
= 5毫安
48
I
OUTFS
= 2.5毫安
THD
@ 100MSPS
55
THD @ 100MSPS
50
45
SINAD @ 100MSPS
40
0.1
SINAD @ 10MSPS
SINAD @ 50MSPS
46
SINAD @ 10MSPS
SINAD @ 50MSPS
SINAD @ 100MSPS
1
10
频率 - 兆赫
100
44
1
10
频率 - 兆赫
100
42
0.1
1
频率 - 兆赫
10
图6. SINAD / THD主场迎战˚F
OUT
（ AVDD
和DVDD = 3.0V）
图7. SINAD / THD主场迎战˚F
OUT
（ Differ-
无穷区间输出， AVDD和DVDD = 3.0V）
图8. SINAD与我
OUTFS
@ 20 MSPS
0
f
时钟
= 25MSPS
f
OUT
= 7.81MHz
SFDR = + 60.7dBc
振幅=的0dBFS
10分贝 - 股利
10分贝 - 股利
0
f
时钟
= 125MSPS
f
OUT
= 27.0MHz
SFDR = + 52.7dBc
振幅= 0DBC
0.6
0.5
0.4
0.3
伏
START ：为0Hz
STOP ：中的62.5MHz
0.2
0.1
0.0
–0.1
–100
START ：为0Hz
STOP ： 12.5MHz的
–100
–0.2
时间 - 为5ns /格
图9.单音频谱图
@ 25 MSPS
图10.单音谱
剧情@ 125 MSPS
图11.阶跃响应
–6–
版本B
AD [ ANALOG DEVICES ]
