For Analog Audio Processors,For a product that operates with One or Two Positive Power Supplies, can unused input signal terminals be grouped together with a single Coupling Capacitor?|FAQ|ROHM Semiconductor

FAQ's

For Analog Audio Processors,
For a product that operates with One or Two Positive Power Supplies, can unused input signal terminals be grouped together with a single Coupling Capacitor?
- Although it is possible to connect them together, please note the following points:
  - ・Unexpected DC current may flow between unused terminals.
  - ・Since the cutoff frequency is determined by the input impedance and the capacitance value of the coupling capacitor, connecting unused terminals together to a single coupling capacitor will increase the cutoff frequency and may reduce the noise rejection effect.
  - ・If noise from unused pins is a problem, increase the capacitance value of the Coupling Capacitor connected to GND to reduce the noise from the unused pins.