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THS4524

Other Parts Discussed in Thread: THS4524, THS4521, TINA-TI

The THS4524 data sheet refers only to gains of 1, 2, 5, and 10.  Can we use this amplifier for a gain of 50 or 100? Note, we only need frequencies up to about 20kHz.

What values of resistors (Reference Table 1) should we use for a gain of 50 or 100?

We need a differential input and single ended output.  Can we just leave one of the SMA connectors open on the amplifier output for single ended output?

Ben Sternberg

University of Arizona

bkslasi@email.arizona.edu

 

 

  • Hello Ben,

    I think the reason that higher gains are not recommended is due to the offset voltage.  If DC accuracy is not a concern then there should be no reason a gain of 50 or 100 would not work. 

    I would start with a feedback resistor value of 10k for a gain of 100. 

    If you want only a single ended output, the other output should be terminated with the same load condition as the desired output.  High speed amplifiers are not always stable with floating output pins, and using the higher value of feedback resistor will make this situation worse. 

    Our TINA-TI simulation software has a model for the THS4521 installed in the library, so you could use that model to test some circuit designs.