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  • OPA378: Can you really use a chopper in a high gain Transimpedance design?

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    Part Number: OPA378 Other Parts Discussed in Thread: OPA392 , OPA387 , OPA333 So this is following up a bit on this earlier OSI photovoltaic design question. I got to thinking about how to really do this when offset voltage is critical - https://e2e.ti…
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  • OPA378: circuits and amplifier as a reference buffer

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    Part Number: OPA378 Other Parts Discussed in Thread: REF3125 , OPA625 Hi team, My customer want to use the reference REF3125 to drive 0-5mA (PWM, 4.8khz), Do we have some recommend circuits and amplifier to support the requirement? if we have the simulation results…
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  • OPA378: OPA378 for high source resistance thermopile

    Part Number: OPA378 Other Parts Discussed in Thread: LMP7731 , OPA325 , OPA376 Hi, I am planning to use OPA378 for interfacing a thermopile that has 68kOhm series resistance. circuit attached. On the non-inverting input, i have the thermopile. 1. Due to…

  • OPA378 1/f or Flicker Noise

    Other Parts Discussed in Thread: OPA378 , OPA348 Hello, The OPA378 op amp shows 0 (zero) 1/f or Flicker noise. Could you please explain why that is? Thank you, Keith

  • RE: OPA348: What's wrong in this double stage SK LPF?

    Ok, I spent some more time on this so might as well share some results - 1st I tried to find a closely related part that might run successfully in my V11 TINA version, the OPA378 is a similar speed but chopper - it also crashed on noise (TINA shut down…
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  • OPA378 odd behavior

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    Other Parts Discussed in Thread: TPL0102-100 , OPA378 , OPA330 , OPA335 , OPA376 , OPA188 , OPA333 , OPA2180 I am using an OPA378 as a buffer on a reference. It is configured as a unity gain buffer, with an RC filter (1MEG series, 15nF shunt) before the noninverting…
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  • EMIRR of OPA378 vs LMV831

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    Other Parts Discussed in Thread: OPA378 , OPA347 , OPA369 , OPA334 , OPA313 , OPA376 , OPA330 , OPA333 , OPA188 , OPA180 , OPA170 , OPA171 Narional Semiconductor developed a method of measuring the EMI rejection ratio (EMIRR) of OpAmps in AN-1698. (This application…
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  • RE: PMP8740: PMP8740

    Hi Roberto, Thanks for your inputs. Sorry, I forgot to mention that we have changed the gain to limit the current to 40A on individual converter. The output of the OPA378 is also as per calculations. As of now, everything is fine expect a small hissing…
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  • RE: OPA189: Using opamp to create a precision negative voltage reference. Can opamp drive decoupling caps?

    Resolved
    ...oh also let me know if there is a better TI opamp to use in the inverting opamp configuration. I'm not married to the OPA191. I like the OPA378 but my rails are +3.3V and -3V and it can't handle that wide of a supply range. The opamp needs low offset…
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  • TINA/Spice/OPA551: Showing different macro file

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    Part Number: OPA551 Other Parts Discussed in Thread: TINA-TI , , OPA378 Tool/software: TINA-TI or Spice Models While entering to OPA551 MACRO it is showing a OPA551ex.TSC s OPA378 .please share the macro file of OPA551..
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