CS4954 datasheet(51/56 Pages) CIRRUS

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CS4954 CS4955

DS278PP4

presented by an unused connector. The analog out-

puts should not overlay the analog power plane to

maximize high frequency power supply rejection.

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

Figure 30. External Low Pass Filter

C2 should be chosen so that C1 = C2 + Ccable

CS4954 Datasheet(PDF) 51 Page - Cirrus Logic