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LM4810: Input Impedance under Shutdown mode

Koshi Ninomiya
Expert 4510 points
Part Number: LM4810
Other Parts Discussed in Thread: TPA2026D2

Dear Team,

Could you let me know the inpur impedance under shutdown mode of LM4810?

My customer is thinking to use Speaker Amp TPA2026D2 and Headphone Amp LM4810 in parallel at Audio DAC line out. There is a case that a SPDT analog switch is used to do audio signal routing. However, if input impedance under shutdown of speaker amp is Hi-Z, it could be not necessary to use the SPDT analog switch, they think.
Could you also let me know the suitable application between the Audio DAC line out and the inputs of Speaker Amp and Headphone Amp in parallel?
Thank you.

Best Regards,

Koshi Ninomiya