ISD5100 – SERIES
7.6.4. PCB Layout Examples
For SOIC package :
PC board traces and the three chip capacitors are on the bottom side of the board.
Note 2
1
V
C
C
D
C1
C2
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
XCLK
Note 1
V
S
S
VSSA
D
Note 3
(Digital Ground)
C1=C2=C3=0.1 uF chip Capacitors
Note 1: VSSD traces should be kept
separated back to the VSS supply feed
point..
C3
Note 2: VCCD traces should be kept
separate back to the VCC Supply feed
point.
To
VCCA
Note 3: The Digital and Analog grounds
tie together at the power supply. The
VCCA and VCCD supplies will also need
filter capacitors per good engineering
practice (typ. 50 to 100 uF).
Analog Ground
Note 3
For TSOP package :
1
VSSA
Note [2]
Note [1]
VCCA
VSSA
VCCA
VCCD
VCCD
VCCD
VSSD
VSSD
VSSD
VSSA
VSSA
Note [3]
Notes:
[1]
[2]
[3]
VSSD traces should be kept separated back to the VSS supply feedpoint.
VCCD traces should be kept separate back to the VCC supply feedpoint.
Digital and Analog grounds tie together at power supply. The VCCA and VCCD supplies will also need filter
capacitors per good engineering practice (typ. 50 to 100 uF).
Publication Release Date: October, 2003
- 55 -
Revision 0.2
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