wms7121100s Winbond Electronics Corp America, wms7121100s Datasheet - Page 17

• Manufacturer Part Number: wms7121100s
• Description: Mixed Signal Winpot Digital Potentiomemter
• Manufacturer: Winbond Electronics Corp America

Use a 0.1µF bypass capacitor as close as possible to the V
performance. Often this can be done by placing the surface mount capacitor on the bottom side of the
PC board, directly between the V
digital traces. Sensitive traces should not run under the device or close to the bypass capacitors.
A dedicated plane for analog ground helps in reducing ground noise for sensitive analog signals.
CONTROL LINES
SIGNAL LINE
11.1. L
DIGITAL
ANALOG
AYOUT
C
ONSIDERATIONS
R
U/D
INC
V
A
/V
SS
A
FIGURE 9 – WMS7120/7121 LAYOUT
DD
and V
SS
pins. Care should be taken to separate the analog and
- 17 -
CAP
DD
pin. This is recommended for best
Publication Release Date: July 2003
WMS7120 / 7121
R
R
V
CS
B
W
/V
DD
/V
B
W
SIGNAL LINES
CONTROL LINE
ANALOG
DIGITAL
Revision 1.0