LMV1012: Dual output for microphone signal

Feng bin Su

Expert 8150 points

Part Number: LMV1012

Hi team,

My customer is looking for a dual output signal for microphone system.

Their microphone spec is as below. Is LMV1012 suitable for their design?

Impedance: 2.2kohm

Sensitivity:-44db ( about: 6.3mV )

over 4 years ago

0 Luis Fernando Rodriguez S. over 4 years ago

TI__Guru* 84915 points

Hi, Feng,

We will take a look at this thread and will provide an answer as soon as possible.

Best regards,
Luis Fernando Rodríguez S.

0 Ivan Salazar over 4 years ago

TI__Guru** 102355 points

Hi Feng,

By "dual output signal" do you mean a differential output? Or two channels?

If looking for two channels you can use a pair of LMV1012 or a dual channel op amp. You should consider LMV1012 is a very small DSBGA device, not sure if that's what you're looking for.

If you need a differential output, perhaps using a fully differential amp can be an option, you can take a look at this appnote: https://www.ti.com/lit/an/sboa332/sboa332.pdf

Best regards,
-Ivan Salazar
Applications Engineer - Low Power Audio & Actuators

0 Feng bin Su over 4 years ago in reply to Ivan Salazar

TI__Expert 8150 points

Hi Ivan,

Thank for your help. It is two channel.

If the source signal is only one channel, would you suggest to connect two LMV1012 with single source instead of one LMV1012 to dual output channel from point of view of load effect. Not sure what kind of load LMV101 will connect to in the usually case?

Ben,

0 Ivan Salazar over 4 years ago in reply to Feng bin Su

TI__Guru** 102355 points

Hi Ben,

You may connect two amplifiers with a single source.

The output connection from LMV1012 would depend on your application, it could be connected to a power amplifier for listening or to an ADC for recording.

Best regards,
-Ivan Salazar
Applications Engineer - Low Power Audio & Actuators

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LMV1012: Dual output for microphone signal