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  user6422847

  • 1 month ago
  • Amplifiers
  • Amplifiers forum

  INA128: Is it a fake?

  • Resolved

  Part Number: INA128 I have a question. The IC mounted on the board becomes an error. Do
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  Louis Ricci

  • 2 months ago
  • Amplifiers
  • Amplifiers forum

  RE: INA128: Output unexpectedly drops to near zero

  Hi Raymond, I think you nailed it. I should have realized that Vcm was exceeding V+ -2. When the output goes to zero, the voltage with respect to ground at pin 2 is 10v and at pin 3 10.5v thus exceeding the V+ -2 rule. Thank you for your help! ...
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  Brian Chou

  • 6 months ago
  • Amplifiers
  • Amplifiers forum

  INA128: The protect circuit design and calculate before the INA128

  Part Number: INA128 I want to use the Zener diode to design the protect circuit for differential input before the INA128. So I try simulate the circuit by using the BZD23-C6V2 to create the VDD(6.5V) and VEE(-6.5V) before the INA128. Before simulate...
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  Praveen Kumar M

  • 8 months ago
  • Amplifiers
  • Amplifiers forum

  INA128: INA128/ Input Impedance

  TI Thinks Resolved

  Part Number: INA128 Dear Sir, I am using INA128. I want to verify input impedance. As per the datasheet 10^10 ohm || 2pf. I measured current through ammeter as shown in the attachment. The current is unstable it is varies from 8 uA to 15uA. In test...
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  user6239208

  • 8 months ago
  • Amplifiers
  • Amplifiers forum

  INA128: Output offset and unexpected gain

  TI Thinks Resolved

  Part Number: INA128 Hello, I'm using an INA128 to measure the voltage difference across a small resistor (1mOhm), using the layout in the attached image. For technical purposes, a current is fed to the resistor using a voltage source and two 50...
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  Raymond Zhang1

  • 9 months ago
  • Amplifiers
  • Amplifiers forum

  RE: INA128: TINA saturation simulation

  Hi Alberto, I see your point. There is an issue with the model outside of linear operating region in AC nodal analysis. The output should have capped at the supply voltage rail as shown in the Transient plot. As the Vin increases from 10mV, 100mV...
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  kai klaas69

  • 11 months ago
  • Amplifiers
  • Amplifiers forum

  RE: INA128: Plane connection under INA128

  Ni Norbert, yes, this makes sense. With a ground plane under the input signals unequal stray capacitances to the ground plane can convert common mode noise into differential noise by forming an imbalanced voltage divider. When using a common mode...
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  Norbert Toth

  • over 1 year ago
  • Amplifiers
  • Amplifiers forum

  INA128: Differential filter

  • Resolved

  Part Number: INA128 Hi Folks, on the image below there is an X2Y example configuration to increase
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  michaelwu

  • over 1 year ago
  • Amplifiers
  • Amplifiers forum

  INA128: seeing output dip with square wave input

  TI Thinks Resolved

  Part Number: INA128 Hi, I'm seeing some strange behavior at the output of INA128 and I was hoping that someone could help identify what might be going wrong. The input, shown in magenta, is a roughly 3-10 V square wave input @ 50% duty cycle...
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  Denny Varghese

  • over 1 year ago
  • Amplifiers
  • Amplifiers forum

  INA128: Variation in voltage at Vref terminal

  • Resolved

  Part Number: INA128 Hi Team, We are using INA128 , Instrumentation Amplifier in our design

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