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参数资料
| 型号： | DC1525A-C |
| 厂商： | Linear Technology |
| 文件页数： | 13/34页 |
| 文件大小： | 0K |
| 描述： | BOARD DEMO 80MSPS LTC2173-14 |
| 软件下载： | QuikEval II System |
| 设计资源： | DC1525A Design Files |
| 标准包装： | 1 |
| 系列： | * |
| 相关产品： | DC1371A-ND - BOARD USB DATA ACQUISITION HS |
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LTC2175-14/
LTC2174-14/LTC2173-14
20
21754314fa
applicaTions inForMaTion
tap is biased with VCM, setting the A/D input at its opti-
mal DC level. At higher input frequencies a transmission
line balun transformer (Figures 4 to 6) has better balance,
resulting in lower A/D distortion.
Amplifier Circuits
Figure 7 shows the analog input being driven by a high
speed differential amplifier. The output of the amplifier is
AC-coupled to the A/D so the amplifier’s output common
mode voltage can be optimally set to minimize distortion.
Figure 4. Recommended Front End Circuit for Input
Frequencies from 70MHz to 170MHz
25
50
0.1F
AIN+
AIN–
4.7pF
0.1F
VCM
ANALOG
INPUT
0.1F
T1
T2
T1: MA/COM MABA-007159-000000
T2: MA/COM MABAES0060
RESISTORS, CAPACITORS ARE 0402 PACKAGE SIZE
217514 F04
LTC2175-14
25
50
0.1F
AIN+
AIN–
1.8pF
0.1F
VCM
ANALOG
INPUT
0.1F
T1
T2
T1: MA/COM MABA-007159-000000
T2: COILCRAFT WBC1-1LB
RESISTORS, CAPACITORS ARE 0402 PACKAGE SIZE
217514 F05
LTC2175-14
25
50
0.1F
2.7nH
AIN+
AIN–
0.1F
VCM
ANALOG
INPUT
0.1F
T1
T1: MA/COM ETC1-1-13
RESISTORS, CAPACITORS
ARE 0402 PACKAGE SIZE
217514 F06
LTC2175-14
25
200
0.1F
AIN+
AIN–
12pF
0.1F
VCM
LTC2175-14
217514 F07
–
+
ANALOG
INPUT
HIGH SPEED
DIFFERENTIAL
AMPLIFIER
0.1F
At very high frequencies an RF gain block will often have
lower distortion than a differential amplifier. If the gain
block is single-ended, then a transformer circuit (Figures
4 to 6) should convert the signal to differential before
driving the A/D.
Reference
The LTC2175-14/LTC2174-14/LTC2173-14 has an internal
1.25V voltage reference. For a 2V input range using the
internal reference, connect SENSE to VDD. For a 1V input
range using the internal reference, connect SENSE to
Figure 5. Recommended Front End Circuit for Input
Frequencies from 170MHz to 300MHz
Figure 6. Recommended Front End Circuit for Input
Frequencies Above 300MHz
Figure 7. Front End Circuit Using a High Speed
Differential Amplifier
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| SM1250M | LAMP T1.25 TELE SLIDE 12V .05A |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DC1525A-D | 功能描述:BOARD DEMO 65MSPS LTC2172-14 RoHS:是 类别:未定义的类别 >> 其它 系列:* 标准包装:1 系列:* 其它名称:MS305720A |
| DC1525A-E | 功能描述:BOARD DEMO 40MSPS LTC2171-14 RoHS:是 类别:未定义的类别 >> 其它 系列:* 标准包装:1 系列:* 其它名称:MS305720A |
| DC1525A-F | 功能描述:BOARD DEMO 25MSPS LTC2170-14 RoHS:是 类别:未定义的类别 >> 其它 系列:* 标准包装:1 系列:* 其它名称:MS305720A |
| DC1525A-G | 功能描述:BOARD DEMO 125MSPS LTC2175-12 RoHS:是 类别:未定义的类别 >> 其它 系列:* 标准包装:1 系列:* 其它名称:MS305720A |
| DC1525A-H | 功能描述:BOARD DEMO 105MSPS LTC2174-12 RoHS:是 类别:未定义的类别 >> 其它 系列:* 标准包装:1 系列:* 其它名称:MS305720A |
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