SSM2167 Gate question

I'm designing a product using a couple of these preamps. I have them in a custom dev board now and for the most part things are fine. However, I've discovered that need all of the features of this device EXCEPT the noise gate. I understand the concept of having one there, and at first I thought it would be a good thing. My problem is that some of the signal levels coming in from the WL93 subminiature condenser mic are so small that i guess it's close to the noise floor of the preamp. This application requires me to pick up ambient noise in the room, not just high sound pressure levels like I would get if it were being used to mic someone speaking directly into it. I tried 5K and even 10K resistors on the gate pin but they killed the ambient levels I need to get.

I like the expansion/compression performance of the device and when i take the gate resistor completely off pin 7 it lets everything in the background through nicely. I'm concerned because the datasheet advises against using anything over a 5K resistor because "The noise floor of the SSM2167 prevents the noise gate from being lowered further without causing problems". I am also getting some pumping noise presumably from the level detector capacitor at times as well. Is there any way to effectively and reliably turn off the noise gate/level detector of this device?  I have not started playing with different values of level detector caps yet.. I have some on order.

Thanks

Chris

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    •  Analog Employees 
    on Aug 2, 2018 4:37 PM
    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

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    EZ Admin
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    •  Analog Employees 
    on Aug 2, 2018 4:37 PM
    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

    Thank you,
    EZ Admin
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