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  • OPA387: The OPA387 output is unstable

    TI Thinks Resolved
    Part Number: OPA387 Hi Sir, I am using an OPA387 amplifier in my design to measure current and display the reading on an LCD. The input current is up to 30 A, and I am using a 1 mOhm shunt resistor. The voltage drop across the shunt resistor…
    • Answered

  • OPA387: Using OPA387 as a voltage follower in a temp sensor

    Resolved
    Part Number: OPA387 Other Parts Discussed in Thread: TINA-TI Tool/software: Hi, I am using OPA387 with a NTC to measure the temperature ranging from -40C to 125C. The OpAmp is used as a voltage follower and goes directly to my MCU. Do I need to put a…
    • Resolved

  • 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…
    • Answered

  • OPA387: What is the difference in "Ultra-high" precision and precision op amps

    Resolved
    Part Number: OPA387 Tool/software: Hello team, Just a simple question. What is the difference in "Ultra-high" precision (Used for OPA387) and precision op amps. Where is the boarder? Best regards, Taketo Furusawa
    • Resolved

  • 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…

  • 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…

  • 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…
    • 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.…
    • Resolved
    • 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) stays…
    • Resolved

  • 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…

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