ALM2403-Q1
ZHCSMT3A –NOVEMBER 2020 –REVISED MARCH 2023
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• Separate grounding for analog and digital portions of circuitry is one of the simplest and most-effective
methods of noise suppression. One or more layers on multilayer PCBs are usually devoted to ground planes.
A ground plane helps distribute heat and reduces EMI noise pickup. Make sure to physically separate digital
and analog grounds, paying attention to the flow of the ground current. For more detailed information, see
Circuit Board Layout Techniques.
• To reduce parasitic coupling, run the input traces as far away as possible from the supply or output traces. If
keeping the traces separate is not possible, then cross the sensitive trace perpendicular, as opposed to in
parallel with the noisy trace.
• Keep the length of input traces as short as possible. Always remember that the input traces are the most
sensitive part of the circuit.
8.4.2 Layout Example
This layout does not verify optimum thermal impedance performance. See TI’s design support web page at
www.ti.com/thermal for general guidance on improving device thermal performance.
Copyright © 2023 Texas Instruments Incorporated
English Data Sheet: SBOSA37
20
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