Capacitive coupling isolation device and receiving circuit

A capacitive coupling isolation device, comprising:

• an external coupling capacitor having a first end electrically connected to a transmitting circuit;
• and
• a receiving circuit electrically connected to a second end of the external coupling capacitor, wherein the receiving circuit includes:
• a protection circuit architecture, including:
• an input bonding pad structure formed by alternatively disposing a plurality of patterned metal layers and a plurality of dielectric layers, wherein the input bonding pad structure includes a filter capacitor electrically connected to the second end of the external coupling capacitor and a ground end;
• a filter resistor electrically connected to the second end of the external coupling capacitor and the ground end, wherein the filter capacitor and the filter resistor form a low-pass filter;
• and
• a direct current (DC) isolation capacitor electrically connected to the second end of the external coupling capacitor and a core circuit of the receiving circuit.

A receiving circuit, applicable to an isolation device, and the receiving circuit comprising:

• a protection circuit architecture, including:
• an input bonding pad structure at least including a first patterned metal layer, a second patterned metal layer, a first dielectric layer located between the first patterned metal layer and the second patterned metal layer, a third patterned metal layer, and a second dielectric layer located between the second patterned metal layer and the third patterned metal layer, wherein the second patterned metal layer, the second dielectric layer, and the third patterned metal layer form a filter capacitor, one end of the filter capacitor is electrically connected to an external coupling capacitor through the first patterned metal layer, and another end of the filter capacitor is electrically connected to a ground end;
• and
• a filter resistor electrically connected to the second patterned metal layer and the ground end, wherein the filter capacitor and the filter resistor form a low-pass filter.