Very Low Power SigmaDSP Application With ADAU1761

HowardR Question

Oct 8, 2011 00:00

I really like the architecture and features of the ADU1761. I am looking for a device for a very low power battery application. Here are some questions reltaed to my application:

It would be really great if the power consumption was even lower and it was possible to run the device at even lower voltages than the min. operating voltages quoted in the data sheet, are the any plans to release lowre voltae/current devices in the family, or maybe widen the operation voltage range (as manufactured device statistics tighten up on conservative epcification limits)?

I am new to these devices. My research on this site seems to indicate that it is possible to implement DSP algorithms such as filters (IIR or FIR), equalization, AGC etc in the memory of these devices. Am I correct?

The main feature of my application is an IIR filter in which I will need to customise the coefficients on a unit by unit basis, is this possible with the software development tool available with the SigmaDSP?

Thank you.

Audio Signal Processors

sigmastudio

SigmaDSP Audio Processors

adau1761

SigmaDSP

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ADIApproved Reply

Oct 10, 2011 00:00

Hi,

There are no plans at the moment for a follow-on to the 1761 with lower voltage operation. You can lower the power consumption with a trade off in performance by changing bias settings for various circuitry in the 1761. Yes you are correct that you can implement various DSP functions in the 1761, you can see a full list of possibilities in sigma studio. You can tune the 1761 on a unit by unit basis assuming you have a microcontroller with flash memory somewhere to boot the 1761 with the relevant program and coefficients.

Best Rgds,

Alan

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HowardR Reply

Oct 11, 2011 00:00

Hi Alan,

Thank you for your answer, is it possible to get below the 3mW level with the bias adjustments you mention?

I assume that the microcontroller you mention would be part of the design circuit?

Regards

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ADIApproved Reply

Oct 11, 2011 00:00

No, it won't be possible to get the power that low. Please see pages 8 and 9 of the datasheet for typical power consumption numbers.

Best Rgds,

Alan

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EZAdministrator Reply

Aug 2, 2018 00:00

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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