CDB5378 Datasheet, PDF (33/72 Pages) Cirrus Logic – Single-channel Seismic Evaluation System

CDB5378
Analog signal connections into the CS3301/02 amplifiers are 2-wire IN+ and IN- differential pairs, and are
routed as such. Analog signal connections out of the CS3301/02 amplifiers and into the CS5373A mod-
ulator is a 4-wire INR+, INF+, INF-, INR- quad group, and is routed with INF+ and INF- as a traditional
differential pair and INR+ and INR- as guard traces outside the respective INF+ and INF- traces.
INR+
INF+
INF-
INR-
INR+
INF+
INF-
INR-
Figure 5. Quad Group Routing
2.5.3 Bypass Capacitors
Each device power supply pin includes 0.1 µF bypass capacitors placed as close as possible to the pin
on the back side of the PCB. Each power supply net includes at least 100 µF bulk capacitance as a charge
well for transient current loads.
TOP
BOTTOM
Figure 6. Bypass Capacitor Placement
DS639DB3
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