11.1 Layout Guidelines

Bypass capacitors must be placed as close as possible to the supply pin. As the LM331 is a through-hole device, it is acceptable to place the bypass capacitor on the bottom layer.

If an input capacitor to ground is used to clean the input signal, the capacitor should be placed close to the supply pin.

Use of a ground plane is recommended to provide a low-impedance ground across the circuit.

11.2 Layout Example

Figure 31. Layout Example