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I have a unipolar but balanced/differential output transducer. The transducer outputs around +/-200mV and I want to amplify this with a gain of at least 10. The data acquisition board is also differential inputs.

Now I want to amplify this balanced transducer signal and obtain again a differential/balanced signal at the output with gain of at least 10.

I found this differential amplifier, but it seems it is not fully differential. But it is great that it has inner gain so no gain temperature issues. But its output is single ended I guess (?)

My problem is I want a fully differential amplifier(with diff outputs) in DIP package which can work any dual supply voltage between min +/-5V up to max +/-15V.

But I couldn't find a single one in the market. Does anybody have experience with that? My frequency of interest in this force transducer application is from DC to 150Hz.

The best would be of course fixed gain fully differential amplifier in DIP package, otherwise resistive networks(which are also not DIP) to eliminate temperature effects on gain or CMRR needed.

(How about using a single ended to differential ended driver after this INA106. My problem is I'm restricted with supply rails and DIP package?)

Edit:

enter image description here

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  • \$\begingroup\$ TI certainly has some, but you might struggle to find one in a DIP package. ti.com/amplifier-circuit/op-amps/fully-differential/… \$\endgroup\$ – Peter Smith Feb 18 at 11:39
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    \$\begingroup\$ Is there a specific reason why you want a differential output? Bear in mind that a balanced transmission requires balanced impedances and not a differential output. However, a differential output can offer 6 dB more noise rejection and reduced emitted EMI but, it's not clear from your question that a diff output is needed and you may be opting for something that isn't really necessary. \$\endgroup\$ – Andy aka Feb 18 at 12:14
  • \$\begingroup\$ What's wrong with AD8476? \$\endgroup\$ – Marko Buršič Feb 18 at 12:57
  • \$\begingroup\$ @Andyaka I added diagrams in my edit. The source is balanced unipolar and at the moment is coupled to a DAQ which is differential input data acq. board. See figure I. I dont need to create bipolar inputs. The reason I was looking for fully diff amplifier was because I thought they are inherently balnced output. Please see my Figure II. Do you think the output of INA106 is balanced? \$\endgroup\$ – user1999 Feb 18 at 17:44
  • \$\begingroup\$ @MarkoBuršič I have to use DIP package. AD8476 is not. \$\endgroup\$ – user1999 Feb 18 at 17:45
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Analog Devices acquired Linear Technology, so now there is one parametric search engine for both companies' products.

https://www.analog.com/en/parametricsearch/11156

Some quick poking around found none in a DIP package. Many are designed to be high speed differential A/D drivers, and the DIP package does not support hundred-megahertz-plus frequencies well.

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