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  • OPA387: Differential Amplifier using opa387

    Part Number: OPA387 Tool/software: Hello guys, I had made a differential circuit for measuring ac voltage and current. In simulation the entire circuit is working and i am getting desired gain(6.8k/2.068M) for u1 ,gain(5k/1k) for u2. But in practical…

  • OPA387: Solar Cell Voltage Measurement

    Part Number: OPA387 Tool/software: Hello, I am currently developing a circuit for solar cell voltage measurement. I'm using a 100 mΩ shunt resistor which connected to cell parallel. I am planing to measure voltage with a ADC. For measuring with ADC a…

  • OPA387: Use as an integrator Is Not Working As Expected

    TI Thinks Resolved
    Part Number: OPA387 Other Parts Discussed in Thread: TLV9061 , TINA-TI , INA826 , OPA392 , OPA333 , TLV9062 Tool/software: I'm using the OPA387 as an integrator. It's part of a servo loop controlling the DC output of another amplifier. The power rails…

  • OPA387: Low frequency noise with cascaded choppers

    TI Thinks Resolved
    Part Number: OPA387 Dear e2e support, My customer is looking for the lowest noise possible AOP solutions at low frequency. Choppers technologies such as the OPAx387 seems to be the best approach. Question is: when we cascade several choppers, can it…
    • Answered

  • OPA387: Current Sense Circuit Input Side Low Pass Filter Design

    Resolved
    Part Number: OPA387 Other Parts Discussed in Thread: TINA-TI Hello, I am using OPA387DBVR for my current sense design and there is a lot of noise on the input and output side. I saw there is a internal low pass filter but its frequency is too high. I need…
    • Resolved

  • OPA387: Want to use K-type thermocouple with OP amp.

    TI Thinks Resolved
    Part Number: OPA387 Other Parts Discussed in Thread: TLV333 Hello TI experts, My customer want to use OP amp with K-type thermocouple, to measure the temperature of the device. actually they used thermocouple to digital converters before, but now they…
    • Answered

  • OPA387: Stability - lower Riso increases stability?

    Resolved
    Part Number: OPA387 Tying to fine-tune a simple amplifier based on on OPA387 I found out that the higher Riso resistor value the lower the stability - see the diagram below, phase-margin(Aol)=61.5°@Riso=100Ω. When Riso is 51 Ω, phase-margin (Aol…
    • Resolved

  • RE: TLV387: Regarding stability criteria for opamp circuits.

    JK, Running AC stability analysis shows a very stable circuit with 66 degrees phase margin whereas the minimum recommended is 45 degrees. The phase dipping at mid-frequency below 45 degrees is not a problem because the stability of the circuit is determined…

  • OPA2387: OPA2387- OPA387

    TI Thinks Resolved
    Part Number: OPA2387 Other Parts Discussed in Thread: OPA387 , In OPA2387 datasheet- (dated to end of 2020- it is a new part)- TI mention the OPA387 single OpAmp. Yet it does not appear as a viable Active TI product, nor can we find its pinout anywhere…
    • Answered

  • OPA387: How can I purchase the pre-production parts?

    Resolved
    Part Number: OPA387 Hello, I would like to order a few pieces of POPA387DBVR. The website shows that stock is available, but will not allow me to add them to my cart. I tried asking customer support (online chat), and they were, unfortunately, completely…
    • Resolved

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