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SSM2305 Audio Amp Input Range

Dear Community,

What is the input range on the SSM2305?  The single supply is 4V.  The signal swings 3Vpp.  I appreciate that this is much larger than the normal "audio" signal.  :-)

Thanks in advance,

Kevin

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  • Hi Harry,

    Thank you for the quick reply.

    I saw in the datasheet that Vcm range is (Vdd-1) - 1 - (2V with a 4V rail).

    As an "audio" amp, I was wondering if Vp-signal is assumed to be about 0.5V:

    @ Vcm = 3V, I could go as high as 3.5V +/-

    @ Vcm = 1V, I could go as low as 2.5V +/-

    I am spoiled by opamps with rail to rail inputs and didn't want to leave any input range on the table.  :-)

    Vcm = 1/2 rail, Vp-signal = 1V it is.

    Thanks,

    Kevin

Reply
  • Hi Harry,

    Thank you for the quick reply.

    I saw in the datasheet that Vcm range is (Vdd-1) - 1 - (2V with a 4V rail).

    As an "audio" amp, I was wondering if Vp-signal is assumed to be about 0.5V:

    @ Vcm = 3V, I could go as high as 3.5V +/-

    @ Vcm = 1V, I could go as low as 2.5V +/-

    I am spoiled by opamps with rail to rail inputs and didn't want to leave any input range on the table.  :-)

    Vcm = 1/2 rail, Vp-signal = 1V it is.

    Thanks,

    Kevin

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