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AD797 Driving 370ohm Load Issue

Question asked by iflyingpig Employee on Feb 2, 2017
Latest reply on Oct 11, 2017 by Emman.A

Dear ADI support team:

  In my current design, AD797 will have to drive a 370ohm resistor load. The output voltage swing will be +-4v.

  My question is: will THD performance degraded when driving a 370ohm load (much lower than standard 600ohm)?

  The attached pic is the circuit, each IV converter will drive two LPF input. The circuit is a modification which can be found in AD1955 DS. The positive input impedance of the MFB filter is 680ohm and the negative input impedance is  812 ohm. So the overall impedance which the IV converter will drive is 370ohm. The load is a resistor load in low frequency.



Thanks a lot!