전자부품 데이터시트 검색엔진
  Korean  ▼
ALLDATASHEET.CO.KR

X  

Preview PDF HTML

WM8944BECS/R 데이터시트(PDF) 84 Page - Cirrus Logic

부품명 WM8944BECS/R
상세설명  Mono Low-Power CODEC with Video Buffer
PDF  165 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
제조업체  CIRRUS [Cirrus Logic]
홈페이지  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

WM8944BECS/R 데이터시트(HTML) 84 Page - Cirrus Logic

Back Button WM8944BECS/R Datasheet HTML 80Page - Cirrus Logic WM8944BECS/R Datasheet HTML 81Page - Cirrus Logic WM8944BECS/R Datasheet HTML 82Page - Cirrus Logic WM8944BECS/R Datasheet HTML 83Page - Cirrus Logic WM8944BECS/R Datasheet HTML 84Page - Cirrus Logic WM8944BECS/R Datasheet HTML 85Page - Cirrus Logic WM8944BECS/R Datasheet HTML 86Page - Cirrus Logic WM8944BECS/R Datasheet HTML 87Page - Cirrus Logic WM8944BECS/R Datasheet HTML 88Page - Cirrus Logic Next Button
Zoom Inzoom in Zoom Outzoom out
 84 / 165 page
background image
WM8944B
84
Rev 4.3
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
4:3
VB_DISOFF
[1:0]
111
Video buffer DC offset control
000 = Reserved
001 = 40mV offset
010 = Reserved
011 = 20mV offset
100 = Reserved
101 = Reserved
110 = Reserved
111 = 0mV offset
Note - the specified offset applies to
the 0dB gain setting (VB_GAIN=0).
When 6dB gain is selected, the DC
offset is doubled.
1
VB_PD
0
Video buffer pull-down
0 = pull-down disabled
1 = pull-down enabled
0
VB_CLAMP
0
Enable the clamp between the
video input and ground
0 = no clamp
1 = Video buffer input is clamped to
ground
Table 57 Video Buffer Control
The video buffer circuit is illustrated in Figure 33.
LDOVDD
VBREF
VIDEO BUFFER
VBIN
VBOUT
TV in
6dB / 12dB (unloaded)
0dB / 6dB (fully loaded)
LPF
clamp
RREF
RSOURCE
RLOAD
Figure 33 Video Buffer Block Diagram
The video buffer requires two external resistor components, as illustrated in Figure 33. For best
performance, the resistor RSOURCE should be matched (equal) to the load impedance RLOAD.
The resistance RREF is a function of the circuit gain and a function of the parallel combination of
RSOURCE and RLOAD. When VB_GAIN = 0 (0dB gain), the current gain of the video buffer is 5, as
described by the equation IVBOUT = 5 x IVBREF.
The resistor RREF should be set equal to 5 x (RSOURCE // RLOAD), where (RSOURCE // RLOAD) is the effective
resistance of the parallel combination of RSOURCE and RLOAD. (Note that the required resistance RREF is
the same for both settings of VB_GAIN.)
In a typical application, RLOAD = 75, RSOURCE = 75, RREF = 187.



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 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100  ...More


데이터시트 다운로드

Go To PDF Page


링크 URL



ALLDATASHEET 가 귀하에 도움이 되셨나요?  [ DONATE ] 

Alldatasheet는?   |   광고문의   |   운영자에게 연락하기   |   개인정보취급방침   |   링크 투 데이터시트    |   링크교환   |   제조사별 검색
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