Figure 12-1 shows an example of a PCB layout for a data acquisition system using the REF2030. Some key considerations are:

• Connect low-ESR, 0.1-μF ceramic bypass capacitors at V_IN, V_REF, and V_BIAS of the REF2030.
• Decouple other active devices in the system per the device specifications.
• 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.
• Minimize trace length between the reference and bias connections to the INA and ADC to reduce noise pickup.
• 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.