SCA103T Series
3
Application Information
3.1 Recommended Circuit Diagrams and Printed Circuit Board Layouts
The SCA103T should be powered from well regulated 5 V DC power supply. Coupling of digital
noise to power supply line should be minimized. A 100nF filtering capacitor between VDD pin 12
and GND plane must be used.
The SCA103T has ratiometric output. To achieve the best performance use the same reference
voltage for both the SCA103T and Analog/Digital converter.
Use low pass RC filters with 5.11 kΩ and 10nF on the SCA103T outputs to minimize clock noise.
Locate the 100nF power supply filtering capacitor close to VDD pin 12. Use as short a trace length
as possible. Connect the other end of capacitor directly to the ground plane. Connect the GND pin
6 to underlying ground plane. Use as wide ground and power supply planes as possible. Avoid
narrow power supply or GND connection strips on PCB.
External instrumentation amplifier connection example is shown below.
Figure 13.
Differential amplifier connection and layout example
The recommended connection example for SPI connection is shown below.
Figure 14.
SPI connection example
VTI Technologies Oy
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Subject to changes
Doc.Nr. 8261700
16/19
Rev.A
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