10.1 Layout Guidelines

Figure 42 illustrates an example of a printed-circuit-board (PCB) layout for a data acquisition system using the REF2030. Some key considerations are:

• Minimize trace lengths in the current source and current mirror paths to reduce impedance.
• Using a solid ground plane helps distribute heat and reduces electromagnetic interference (EMI) noise pickup.
• Place the external components as close to the device as possible. This configuration prevents parasitic errors (such as the Seebeck effect) from occurring.
• Do not run sensitive analog traces in parallel with digital traces. Avoid crossing digital and analog traces if possible, and only make perpendicular crossings when absolutely necessary.