AMC1305L25 Datasheet, PDF (28/39 Pages) Texas Instruments – AMC1305x High-Precision, Reinforced Isolated Delta-Sigma Modulators

AMC1305L25, AMC1305M05, AMC1305M25
SBAS654C – JUNE 2014 – REVISED DECEMBER 2014
12 Layout
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12.1 Layout Guidelines
A layout recommendation showing the critical placement of the decoupling capacitors (as close as possible to the
AMC1305) and placement of the other components required by the device is shown in Figure 56.
For the AMC1305L25 version, place the 100-Ω termination resistor as close as possible to the CLKIN, CLKIN_N
inputs of the device to achieve highest signal integrity. If not integrated, an additional termination resistor is
required as close as possible to the LVDS data inputs of the MCU or filter device; see Figure 57.
12.2 Layout Examples
Top View
Clearance area
to be kept free of any
conductive materials
From shunt
resistor
LEGEND
TOP layer:
copper pour & traces
high-side area
controller-side area
via to ground plane
via to supply plane
NC
1
AINP
AINN
AGND
NC
NC
0.1 µF
SMD
0603
AVDD
AGND
AMC1305Mxx
16
DGND
NC
DVDD
0.1 µF
SMD
0603
CLKIN
NC
DOUT
NC
DGND
Figure 56. Recommended Layout of the AMC1305Mx
to/from
MCU
(filter)
28
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