PEB2465 SIEMENS [Siemens Semiconductor Group], PEB2465 Datasheet - Page 86

• Manufacturer Part Number: PEB2465
• Description: Four Channel Codec Filter
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Semiconductor Group
12
12.1
Keep in mind that inside the SICOFI-4 all the different
the substrate of the chip, and the areas connected to different grounds are separated on
chip.
a) Separate all digital supply lines from analog supply lines as long as possible.
b) Use a separate GND-connection for the capacitors which are filtering the Reference
c) Don’t use a common ground-plane under the SICOFI-4.
d) Use a large ground-plane (distant from the SICOFI-4) and use different ground lines
12.2
a) To achieve a good filtering for the high frequency band, place SMD ceramic-capaci-
b) One 100 nF SMD ceramic-capacitor is needed to filter the digital supply (
c) Use 220 nF ceramic-capacitors to connect
d) Place all filter capacitors as close as possible to the SICOFI-4 (most important!!!).
e) Use one central Tantalum-capacitor with about 1 F to 10 F to block
voltage (220 nF ceramic-capacitor at
for connecting the SICOFI-4: one common analog ground and a separate digital
ground.
tors with 100 nF from
GNDD).
Board Layout Recommendation
Board Layout
Filter Capacitors
V
DDA12
and
V
DDA34
V
H12
86
to GNDA.
/
V
V
H34
H12
).
and
Board Layout Recommendation
V
V
H34
DD
-supplies are connected via
to analog ground.
V
DD
PEB 2465
to GND.
V
DDD
02.97
to