LMV1012 - What is the Drive capability ?

karthik venkatesh

Intellectual 345 points

Other Parts Discussed in Thread: ADS803, LMV1012

Hi,

I am using a MEMS Microphone ADMP504 whose output is to be fed to a 12 bit ADC.

ADC i have chose is ADS803.

This ADC has an input capacitance of 20pF (Typical).

Since the MIC's output is only 0.25V peak-peak, i am using LMV1012 pre-amp at the MIC's output.

I am not sure whether this LMV1012 pre-amp can drive the ADC.

I could not find load drive or output capacitance data mentioned in the LMV1012 datasheet.

Could you please help me on this ?

Below is my MIC + Preamp Ckt.

Thanks and regards,

Karthik

over 12 years ago

0 Nisha Patel over 12 years ago

TI__Intellectual 1055 points

Hi Karthik,

I forwarded your question to the engineers responsible for this device. They will respond to you shortly.

Best Regards,

Nisha

0 John De Celles over 12 years ago in reply to Nisha Patel

TI__Expert 3840 points

Hi Karthik,

I don't have any reason to believe that the preamp won't work just fine driving the ADC. As shown in the LMV1012 datasheet on page 12 Figure 6, are RF noise immunity capacitors that would present a similar load.

Best Regards,

Audio

Audio forum

LMV1012 - What is the Drive capability ?