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Showing 148 results View by: Thread Post Sort by

  • OPA388: Rail-to-rail amp output gets stuck at upper rail.

    TI Thinks Resolved
    Part Number: OPA388 Other Parts Discussed in Thread: TINA-TI I'm using the OPA388 in a current-measurement design. I use the '388 to amplify (Gain = 10,000) the voltage across a shunt resistor, with the expectation that 200uA into the shunt generates…

  • OPA388: OPA388's input bias current

    TI Thinks Resolved
    Part Number: OPA388 Other Parts Discussed in Thread: OPA2836 Hello, TI members, We want to ask you some questions regarding input bias current. We have a current meter which can measure a pA resolution current using 1 µA range level. We try to measure…
    • Answered

  • OPA388: Max. Capacitive Load

    Resolved
    Part Number: OPA388 Other Parts Discussed in Thread: OPA392 , TINA-TI , INA240 Hi, We are using the design below. We observe that the output of the OPA388IDBV oscillates. We think that is due to the capacitive load on its output (400nF) Could you…
    • Resolved

  • OPA388: Phase Current Abnormal Waveform

    Part Number: OPA388 Other Parts Discussed in Thread: UCC27211 , Hi all, I have custom design BLDC driver board with OPA388 amplifier and UCC27211 gate driver IC. I attached the 3 phase current measurement screens. I couldn't measure the third phase…

  • OPA388: OPA388 close loop gain

    Part Number: OPA388 Other Parts Discussed in Thread: OPA2182 , OPA182 Dear team, Customer has a requirement, I recommend OPA388 but customer think the close loop gain @ G=100 is small. So do we have similar zero-cross, zero-drift amplifier but with…
    • Answered

  • OPA388: Low flicker noise operational amplifiers / Is the OPA388 completely 1/f noise free?

    Resolved
    Part Number: OPA388 Other Parts Discussed in Thread: OPA2388 , OPA376 , OPA333 , INA826 , OPA320 , INA821 , OPA2380 , OPA145 , OPA1612 Hi everyone, I'm developing an ECG test-bed for analog output front-ends as an academic project. The ECG signal…
    • Resolved

  • OPA388: Supply power.

    TI Thinks Resolved
    Part Number: OPA388 Hi team, Can I use the OPA388 in Vs+= 3.3V / Vs- = -1.8V? Sincerely. Kengo.

  • OPA388: OPA388 output voltage oscillations

    Part Number: OPA388 Hello, I use the OPA388IDGKx as amplifier folower to make a voltage reference in my circuit. The problem is, there is an 40mV oscillation at 500KHZ present in my output voltage. The input of amplifier is a voltage reference…
    • Answered

  • OPA388: what's the chopping frequency implemented in the zero offset amp?

    Resolved
    Part Number: OPA388 Hi, In the article below it describes the way to achieve zero offset for an amp. https://www.ti.com/lit/an/sboa182c/sboa182c.pdf?ts=1645362278003&ref_url=https%253A%252F%252Fwww.ti.com%252Fsitesearch%252Fen-us%252Fdocs%252Funiversalsearch…
    • Resolved

  • OPA388: Ringing

    Part Number: OPA388 Hi Team, Our customer is using OPA388 but a ringing appears everytime he change the state from low to middle or high to middle voltage from a DAC of a microcontroller. Please see the waveform below for reference. He mesured the output…
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