AMC1204_15 Datasheet, PDF (26/37 Pages) Texas Instruments – AMC1204 20-MHz, Second-Order, Isolated Delta-Sigma Modulator

AMC1204, AMC1204B
SBAS512E – APRIL 2011 – REVISED SEPTEMBER 2015
10 Layout
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10.1 Layout Guidelines
• Place the decoupling capacitors for AVDD and DVDD as close as possible to the AMC1204.
• Ensure that the traces that connect the shunt resistor to the RC filter on the VINP terminal are symmetrical to
and have the same length as the traces connecting to the VINN terminal.
• The top and bottom PCB layers underneath the AMC1204 must be kept free of any conductive materials in
order to comply with the creepage and clearance distances shown in the Package Characteristics section.
10.2 Layout Example
Figure 54 shows the recommended layout and placement of the decoupling capacitors and other components
required by the AMC1204 and AMC1204B.
Top View
Clearance Area
Keep Free of Any Conductive Materials
To
Shunt
12
SMD 0603 330pF
SMD
12
0603
SMD 0603
0.1F
SMD
1206
AVDD
VINP
VINN
AGND
NC
AMC1204,
AMC1204B
DGND
NC
0.1 F
SMD
0603
DVDD
CLKIN
NC
NC
DATA
NC
NC
LEGEND
Top layer; copper pour and traces
High-Side Area
Controller-Side Area
Via
AGND
DGND
Figure 54. Recommended Layout
From microcontroller
or system CLK
To microcontroller
or filter IC
26
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