WMS7111 WINBOND [Winbond], WMS7111 Datasheet - Page 17

• Manufacturer Part Number: WMS7111
• Description: NONVOLATILE DIGITAL POTENTIOMETERS WITH UP/DOWN (3-WIRE) INTERFACE
• Manufacturer: WINBOND [Winbond]

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
U/D
INC
V
V
SS
A
FIGURE 9 – WMS7110/1 LAYOUT
DD
and V
SS
pins. Care should be taken to separate the analog and
- 17 -
CAP
DD
Publication Release Date: April 21, 2005
pin. This is recommended for best
V
CS
V
V
DD
W
B
WMS7110/1
SIGNAL LINES
CONTROL LINE
ANALOG
DIGITAL
Revision 1.1