Datasheet 搜索 > 开发套件 > TI（德州仪器） > ADS4449EVM 数据手册 > ADS4449EVM 数据手册 43/56 页
￥ 5221.148
ADS4449EVM 数据手册 - TI（德州仪器）
制造商:
TI（德州仪器）
分类:
开发套件
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
引脚图在P3P4Hot
典型应用电路图在P41P42P43P44
原理图在P21
封装尺寸在P51P53P54
标记信息在P51
封装信息在P50P51P52P53P54
技术参数、封装参数在P5
应用领域在P1P56
电气规格在P7P8
导航目录
ADS4449EVM数据手册
Page:
of 56 Go
若手册格式错乱，请下载阅览PDF原文件
1:2
50 :
1:1
Band-Pass Filter
Centered at
f
0
= 310 MHz
BW = 125 MHz
T1
T2
VCM
Device
0.1 PF
50 :
50 :
10 :
10 :
10 pF
27 nH
25 :
25 :
0.1 PF
0.1 PF
INP
INM
R
IN
C
IN
1:2
50 :
1:1
Band-Pass Filter
Centered at
f
0
= 185 MHz
BW = 125 MHz
T1
T2
VCM
Device
0.1 PF
100 :
100 :
10 :
10 :
10 pF
82 nH
25 :
25 :
68 :
68 :
120 nH
0.1 PF
0.1 PF
INP
INM
R
IN
C
IN
VCM
Device
0.1 PF
25 :
25 :
10 :
10 :
10 pF
27 nH
25 :
25 :
INP
INM
R
IN
C
IN
1:1
50 :
1:1
Band-Pass Filter
Centered at
f
0
= 310 MHz
BW = 125 MHz
T1
T2
0.1 PF
0.1 PF
43
ADS4449
www.ti.com
SBAS603A –APRIL 2013–REVISED JANUARY 2016
Product Folder Links: ADS4449
Submit Documentation FeedbackCopyright © 2013–2016, Texas Instruments Incorporated
Typical Application (continued)
Figure 55. Driving Circuit for a 50-Ω Source Impedance and Input Frequencies
in the Third Nyquist Zone
TI recommends terminating the drive circuit by a 50-Ω (or lower) impedance near the ADC for best performance.
However, in some applications higher impedances be required to terminate the drive circuit. Two example driving
circuits with 100-Ω differential termination are shown in Figure 56 and Figure 57. In these example circuits, the
1:2 transformer (T1) is used to transform the 50-Ω source impedance into a differential 100 Ω at the input of the
band-pass filter. In Figure 56, the parallel combination of two 68-Ω resistors and one 120-nH inductor and two
100-Ω resistors is used (100 Ω is the effective impedance in pass-band) for better performance.
Figure 56. Driving Circuit for a 100- Ω Source Impedance and Input Frequencies
in the Second Nyquist Zone
Figure 57. Driving Circuit for a 100- Ω Source Impedance and Input Frequencies
in the Third Nyquist Zone
器件 Datasheet 文档搜索
AiEMA 数据库涵盖高达 72,405,303 个元件的数据手册，每天更新 5,000 多个 PDF 文件
