which is the best multiplier with very low noise and best performance in low frequency range?

i want to make a multiplier and my signal ranges from 1uHZ to 100Khz range. Which is the best multiplier in this class?

i selected AD734 . as it have got better slew rate. better settling time , lower frequency error . But ADL5391 is also another comparable part. Please tell me which one is the best that i can choose?

Regards

kuttath

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  • Hi Arun K A,

    There are only few devices that belongs to this product category but still we want to know what exactly are your application to help you better. For the mean time, yes, you can start with AD734 but i think ADL5391 is too much for your application's frequency range. Things that you should also consider is your input voltage requirement and output swing. In this case, AD734 has its vin min to max of +/- 12.5V. If your application only requires multpilication, AD532 and AD835 is also a good product which perform direct multiplication with minimum external components required. AD734 comes with additional function ( U inputs for division and Z inputs for sum) which you might not needed. AD835 has voltage noise density of 50 nV/rtHZ but can only guaranteed to perform well at +/- 1 V differential voltage range with output voltage swing of +/- 2.5 V.

    Regards,

    Phil

Reply
  • Hi Arun K A,

    There are only few devices that belongs to this product category but still we want to know what exactly are your application to help you better. For the mean time, yes, you can start with AD734 but i think ADL5391 is too much for your application's frequency range. Things that you should also consider is your input voltage requirement and output swing. In this case, AD734 has its vin min to max of +/- 12.5V. If your application only requires multpilication, AD532 and AD835 is also a good product which perform direct multiplication with minimum external components required. AD734 comes with additional function ( U inputs for division and Z inputs for sum) which you might not needed. AD835 has voltage noise density of 50 nV/rtHZ but can only guaranteed to perform well at +/- 1 V differential voltage range with output voltage swing of +/- 2.5 V.

    Regards,

    Phil

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