It is recommended to use 0.47uf bypass capacitor between VCC pin and GND pin. The capacitor should be as close to the chip package as possible.

In the case of using the Voit function, external capacitance is required. It is recommended that the capacitance is within 220pf-10nf, and the default capacitance is 1NF. If the capacitance is too large, the output will be unstable. If the capacitance is too small, the VPP noise will be large.

In the case of using VREF function, external capacitance is required. It is recommended to be within 220pf-10nf, and the default capacitance is 1NF. If the capacitance is too large, the output will be unstable. If the capacitance is too small, the VPP noise will be large.