参数资料
型号: CDB4955A
厂商: Cirrus Logic Inc
文件页数: 50/60页
文件大小: 0K
描述: EVALUATION BOARD FOR CS4955A
标准包装: 1
主要目的: 视频,视频处理
嵌入式: 是,其它
已用 IC / 零件: CS4955
主要属性: NTSC/PAL 数字视频编码器
次要属性: 图形用户界面,RS-232 接口
已供物品:
相关产品: CS4954-CQZR-ND - IC VID ENCODER NTSC/PAL 48-TQFP
598-1682-ND - IC VIDEO ENCODER NTSC/PAL 48TQFP
CS4954 CS4955
54
DS278F6
This reduces the total power that the CS4954/5 re-
quires, and eliminates the impedance mismatch
presented by an unused connector. The analog out-
puts should not overlay the analog power plane in
order to maximize high frequency power supply re-
jection.
9.5
Analog Output Protection
To minimize the possibility of damage to the ana-
log output sections, make sure that all video con-
nectors are well grounded. The connector should
have a good DC ground path to the analog and dig-
ital power supply grounds. If no DC (and low fre-
quency) path is present, improperly grounded
equipment can impose damaging reverse currents
on the video out lines. Therefore, it is also a good
idea to use output filters that are AC coupled to
avoid any problems.
9.6
ESD Protection
All MOS devices are sensitive to Electro Static
Discharge (ESD). When manipulating these devic-
es, proper ESD precautions are recommended to
avoid performance degradation or permanent dra-
mage.
9.7
External DAC Output Filter
If an output filter is required, the low pass filter
shown in Figure 30 can be used.
2.2
μH
330pF
220pF
OUT
IN
C1
C2
Figure 30. External Low Pass Filter
NOTE:
C2 should be chosen so that C1 = C2 + Ccable
33pF
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