数据搜索系统，热门电子元器件搜索
  Chinese  ▼
ALLDATASHEETCN.COM

X  

预览 PDF HTML

AD6622S/PCB 数据表(PDF) 14 Page - Analog Devices

部件名 AD6622S/PCB
功能描述  Four-Channel, 75 MSPS Digital Transmit Signal Processor TSP
PDF  28 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

AD6622S/PCB 数据表(HTML) 14 Page - Analog Devices

Back Button AD6622S/PCB Datasheet HTML 10Page - Analog Devices AD6622S/PCB Datasheet HTML 11Page - Analog Devices AD6622S/PCB Datasheet HTML 12Page - Analog Devices AD6622S/PCB Datasheet HTML 13Page - Analog Devices AD6622S/PCB Datasheet HTML 14Page - Analog Devices AD6622S/PCB Datasheet HTML 15Page - Analog Devices AD6622S/PCB Datasheet HTML 16Page - Analog Devices AD6622S/PCB Datasheet HTML 17Page - Analog Devices AD6622S/PCB Datasheet HTML 18Page - Analog Devices Next Button
Zoom Inzoom in Zoom Outzoom out
 14 / 28 page
background image
AD6622
–14–
REV. 0
Table II lists maximum bandwidth that will be rejected to various
levels for CIC5 interpolation factors from 1 to 32. Figure 15
corresponds to the listing in the –110 dB column and the LCIC5
= 5 row. It is worth noting that the rejection of the CIC5 improves
as the interpolation factor increases.
Table II. CIC5 Alias Protection
–110 dB
–100 dB
–90 dB
–80 dB
–70 dB
1
Full
Full
Full
Full
Full
2
0.101
0.127
0.160
0.203
0.256
3
0.126
0.159
0.198
0.246
0.307
4
0.136
0.170
0.211
0.262
0.325
5
0.141
0.175
0.217
0.269
0.333
6
0.143
0.178
0.220
0.272
0.337
7
0.144
0.179
0.222
0.275
0.340
8
0.145
0.180
0.224
0.276
0.341
9
0.146
0.181
0.224
0.277
0.342
10
0.146
0.182
0.225
0.278
0.343
11
0.147
0.182
0.226
0.278
0.344
12
0.147
0.182
0.226
0.279
0.344
13
0.147
0.183
0.226
0.279
0.345
14
0.147
0.183
0.226
0.279
0.345
15
0.148
0.183
0.227
0.280
0.345
16
0.148
0.183
0.227
0.280
0.345
17
0.148
0.183
0.227
0.280
0.346
18
0.148
0.183
0.227
0.280
0.346
19
0.148
0.183
0.227
0.280
0.346
20
0.148
0.184
0.227
0.280
0.346
21
0.148
0.184
0.227
0.280
0.346
22
0.148
0.184
0.227
0.280
0.346
23
0.148
0.184
0.227
0.280
0.346
24
0.148
0.184
0.227
0.280
0.346
25
0.148
0.184
0.227
0.281
0.346
26
0.148
0.184
0.227
0.281
0.346
27
0.148
0.184
0.227
0.281
0.346
28
0.148
0.184
0.227
0.281
0.346
29
0.148
0.184
0.227
0.281
0.346
30
0.148
0.184
0.227
0.281
0.346
31
0.148
0.184
0.227
0.281
0.346
32
0.148
0.184
0.228
0.281
0.346
CIC2
The CIC2 is a second-order interpolating cascaded integrator
comb whose impulse response is completely defined by its inter-
polation factor, LCIC2. The value LCIC2–1 can be independently
programmed for each channel at location 0x08. While this con-
trol register is 8 bits wide, LCIC2 should be confined to the ranges
shown by the table below according to the interpolation factor
of the CIC5. Exceeding the recommended guidelines may result in
overflow for input sequences at or near full scale. While relatively
small values of LCIC5 allow for the larger overall interpolation
factors with minimal power consumption, LCIC5 should be maxi-
mized to achieve the best overall image rejection.
Table III. Maximum LCIC2 Limits
LCIC5
Max LCIC2
1–19
256
20
209
21
172
22
143
23
119
24
101
25
85
26
73
27
63
28
54
29
47
30
41
31
36
32
32
The transfer function of the CIC2 is given by the following
equations with respect to the CIC2 output sample rate, fOUT.
CIC
z
z
z
L
CIC
2
1
1
2
1
2
()
–
–
–
–
=


(14)
This polynomial fraction can be completely reduced as follows,
demonstrating a finite impulse response with perfect phase lin-
earity for all values of LCIC2.
CIC
z
z
z
e
k
k
L
j
k
L
k
L
CIC
CIC
CIC
2
0
2
1
2
1
2
2 1
2
2 1
()
––
=

 =−


−
=
−
=
∑∑
π
(15)
The frequency response of the CIC2 can be expressed as follows.
The maximum gain is LCIC2 at baseband. The initial 1/LCIC2
factor normalizes for the increased rate, which is appropriate
when the samples are destined for a DAC with a zero order hold
output.
CIC
f
L
Lf
f
f
f
CIC
CIC
OUT
OUT
2
1
2
2
2
()
sin
sin
=
×




π
π
(16)
As an example, we will consider an input from the CIC5 whose
bandwidth is 0.0033 of the CIC5 rate, centered at baseband.
Interpolation by a factor of five reveals five images, as shown
below.



Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28


数据表 下载

Go To PDF Page


链接网址



ALLDATASHEET是否为您带来帮助?  [ DONATE ] 

关于 Alldatasheet   |   广告服务   |   联系我们   |   隐私政策   |   数据表链接    |   链接交换   |   制造商名单
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com