Precision Amplifiers

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Precision Amplifiers

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instrumentation amplifer
Related Posts

  • Forum Post: Re: Power supply for instrumentation amplifier

    Abhinav null
    Hello, I have designed an ECG Amplifier using INA 128. But supply seems to be a problem for me. Using an IC number 7660, i was able to generate a negative voltage. But after sometime, ripples were visible in my ECG. I'll post m requirement in a simple way. From a 3.6 Volts Li battery, please...
    on Sep 22, 2009

  • Forum Post: Very High Input Impedance Buffer Amp

    Arvo Palm-Leis
    Hi! I'm trying to build a buffer amplifier with input impedance ~100 MΩ. Using the BB OPA277 with ~1MΩ the output drifts about 0.5V. At 100 MΩ it's almost to the V+ rail. How can I get the input impedance up? Thanks!
    on May 20, 2010

  • Forum Post: TLC2264AID date codes help & output capability differences

    sean52200
    Hi, I was wondering if anyone knows or runs into some limitations with these TLC2264AID: http://focus.ti.com/docs/prod/folders/print/tlc2264a.html some questions: What’s the difference between these date codes (above marking “2264AI”): 71CK8TM and 17CH1HT? the markings...
    on Jun 23, 2010

  • Forum Post: Any drawback tying all gaurds pins toghether on an INA116 Instrumentation Amp?

    Edward Dempsey
    Hi, We are in the process of utilizing the INA116 in a current PCB design and had a question regarding the connection of the guard pins on the INA116. The engineer that did the board layout ended up tying all guard pins together for simplicity in the board design. I have looked at the INA116 data...
    on Dec 7, 2010

  • Forum Post: Smaller instrumentation amp with the same noise performance as the INA103

    Andrew Madsen
    I'm working on a a design that requires very low noise. The INA103 works very well in my application, but its SOIC-16 package is much larger than I would like. I'm wondering if there's another available instrumentation amp with a noise figure around 1nV/sqrt(Hz) that comes in a smaller surface...
    on Dec 16, 2010

  • Forum Post: Re: How is Gain Error of INA129 when G=10000?

    Neil Albaugh
    Hanhui; Instead of putting your instrumentation amplifier in such a high gain, 10,000 , you might be better served by operating it in a lower gain of 100 or even 1,000 with an op amp second stage in a gain of 100 or 10. This will give you better control of your gain and provide far higher bandwidth...
    on May 16, 2011

  • Forum Post: Re: How is Gain Error of INA129 when G=10000?

    Neil Albaugh
    Hanhui; I think the problem is the common-mode range of your second INA129. Instead of a second INA129, simply use a rail-to-rail op amp in a non-inverting gain of 10V/V.
    on May 17, 2011

  • Forum Post: Re: INA163 Offset Voltage Adjustment

    Neil Albaugh
    Dinh, You should make use of the "Reference" pin on the INA163-- pin 10. Drive it with a low impedance voltage source such as shown in Figure 3 of the data sheet. The voltage applied to the REF pin will be added directly to your outout signal and large offsets can be created in this way...
    on May 18, 2011

  • Forum Post: Re: EMG active amplifier using INA326

    Neil Albaugh
    Pete; If we could find John Brown he would be a great resource for biomedical electronics answers; he wrote a texbook on biomedical instrumentation. Many of the INA circuits were developed by John.
    on May 18, 2011

  • Forum Post: Re: INA163 Offset Voltage Adjustment

    Neil Albaugh
    Dinh; Yes, a different pot is needed for +/-5V. R=E/I where E= 10V total and I= 100ua, so 10V / 100uA = ?
    on May 18, 2011

  • Forum Post: Re: OPA376 output noise

    Neil Albaugh
    Mujahid; There are a number of things that can cause the output to be influenced by the ambient air-- as you said "Air Con Off". One is simply the thermoelectric potentials caused by dissimilar metals in the input portion of your circuit. Very high gain and air turbulence can cause delta...
    on May 27, 2011

  • Forum Post: INA333, integrated active filter

    richard payne62974
    Is there a way to integrate INA333 with active filter (butterworth) so I can eliminate op-amp that done this? INA333 is used to measure voltage drop as part of current sense. I have +5V and 2.5V comm.
    on May 28, 2011

  • Forum Post: Re: Current measurement

    Neil Albaugh
    Shlomi; Do not overlook using an instrumentation amplifier (IA) to measure the voltage drop across a shunt resistor. Current shunt monitors and difference amplifiers all have their place but the accuracy of a true IA is unsurpassed.
    on Jun 24, 2011

  • Forum Post: Need help

    deski beri
    Hello, I am a chemistry student currently working on photoacoustic spectroscopy (frankly speaking; working to build a photoacoustic spectrometer). In my experiment, I am using IIIb series 633 nm HeNe laser, 25 mW , bombarded to malachite green sample in stainless steel compartment, I used a piezoelectric...
    on Jun 27, 2011

  • Forum Post: INA116PA Instrumentation amplifier troubleshooting

    Sam Kenny
    Hi all, I recently purchased a few INA116PA instrumentation amplifiers to amplify a slowly oscillating (period = 140s, amplitude = 60mV) signal taken from a chemical cell for a chemistry experiment. Right now I'm trying to get started with the amplifier, just seeing if I can amplify a DC voltage...
    on Aug 18, 2011

  • Forum Post: INA116 for electrometer application

    L���szl��� Boromisza
    Hello I'm a radiometric engineer and would like to design a simple, current input, 0-10V output, precision amplifier module using the INA116 IC. As it can be read from the INA116 datasheet, it is an instrumetation amplifier, but can it be used as a transimpedance amplifier? I mean: the...
    on Oct 10, 2011

  • Forum Post: Which instrumentation amplifier should I use?

    Nathan Mutter
    I would like to use an instrumentation amplifier to amplify a strain gauge bridge signal (on the order of mV) to an amplitude of V (a gain of 1000). The voltage signal I would like to amplify is actually a square pulse which goes from 0 mV to approximately 5 mV and back to 0 mV over a time span of approximately...
    on Nov 28, 2011

  • Forum Post: The saturate state can damage INA333?

    Jorge Cano
    I am testing a basic configuration for the INA333 with a gain of 1000, to work with a type pressure sensor Wheatstone bridge, my range of voltage to the sensor output is 0.3mV to 15mV, these values ​​saturate the amplifier after 3mV. The problem is that after a couple of minutes of running the INA333...
    on Feb 2, 2012

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