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  dg.almeida

  • 13 days ago
  • Amplifiers
  • Amplifiers forum

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

  • Resolved

  Part Number: OPA388 Hi everyone, I'm developing an ECG test-bed for analog output front-ends
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  Konstantin Kim

  • 2 months ago
  • Amplifiers
  • Amplifiers forum

  OPA388: "non-standard" SPICE Syntax

  TI Thinks Resolved

  Part Number: OPA388 ref: ref: e2e.ti.com/.../592273 Exactly same issue happen with p-spice model of OPA388 XIQ+ is not valid syntax
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  Sammi Shang

  • 4 months ago
  • Amplifiers
  • Amplifiers forum

  OPA388: OPA388 close loop gain

  Part Number: OPA388 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 higher close loop gain when G=100? They need measure...
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  Marek Lis

  • 4 months ago
  • Amplifiers
  • Amplifiers forum

  RE: OPA388: Reg : IC Current consumption

  Radhakrishnan, The total current required from the LDO for proper operation of the circuit, includes sum of all the quiescent current of all IC's plus all the current loads being sourced from all the chips you use. Thus, in order to determine the...
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  Raymond Zhang1

  • 4 months ago
  • Amplifiers
  • Amplifiers forum

  RE: OPA388IDBVR

  Hi May, Op Amps have issues when driving capacitive loads. It introduced another poles within the feedback loop. Generally, op amp will have a single pole roll off at -20dB/decade. If a second pole is generated within the feedback loop, it rolls off...
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  Kandula Ramalinga Reddy

  • 9 months ago
  • Amplifiers
  • Amplifiers forum

  OPA388: OPA388IDBVT

  TI Thinks Resolved

  Part Number: OPA388 Hello Team, We are using OPA388IDBVT Op-amp as unity gain voltage follower and see an issue with output when we feed clock signal at input (Sine wave). We see a variation of around 0.5Hz on 2KHz input signal at output when we...
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  Raymond Zhang1

  • 9 months ago
  • Amplifiers
  • Amplifiers forum

  RE: OPA388: failed to find DC operating point for AC analysis with OPA388 third party OpAmp?

  Hi Tarik, I am able to run your file after slight modification without issues. Please make sure that your OPA388.txt is renamed as OPA388.lib, which it has to be in the default search path. BTW, the opa388.lib file is copied directly from TI website...
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  Clemens Ladisch

  • 21 days ago
  • Amplifiers
  • Amplifiers forum

  RE: About small input bias offset voltage Op Amps (chopper noise).

  The OPA189 datasheet says: 8.3.3 Input Bias Current Clock Feedthrough Zero-drift amplifiers such as the OPAx189 use switching on the inputs to correct for the intrinsic offset and drift of the amplifier. Charge injection from the integrated switches...
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  Michael Steffes

  • 11 months ago
  • Amplifiers
  • Amplifiers forum

  OPA388: Settling time plots and measurements - possible PDS error

  TI Thinks Resolved

  Part Number: OPA388 I was reviewing new parts for fine scale settling plots - the OPA388 shows a couple, +/-1V where they quote different windows of 0.01% settling The curves being a bit noisy imply a measurement (as opposed to simulation). Was that...
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  user4963713

  • over 1 year ago
  • Amplifiers
  • Amplifiers forum

  OPA388: weird behaviour with large signals

  Part Number: OPA388 Hello, OPA388 behaviour measured with following. IN+ is connected to adjustable voltage to set output voltage level. Settling is correct when output voltage starts from linear region ie. output is below 3V (+margin). Green...

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