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Instrumentation Amplifier
Related Posts

  • Forum Post: Re: Power supply for instrumentation amplifier

    nancy!
    Hi Jeff, The INA122 has a wide input range. Based on your question, it appears that you are considering two different ways to power it. If you can narrow it down, then we can help design the supply. If you are asking what is the best way to power the INA122 itself, let me know. I suspect that the...
    on Mar 18, 2009

  • Forum Post: INA326 EMG amplifier

    TJ10751
    I'm trying to make an EMG front end amplifier with an INA326 and several OP amps for respective HP/ LP filtering. Could someone point me in the right direction with building such a device? I'll be using filterpro for the hardware HP/LP filters with OP233's. What i understand is that there...
    on Apr 21, 2009

  • Forum Post: Instrumentation Amplifier Output Offset

    Jim Gealy
    Greetings, I am building a very simple circuit. I need to take a 0V to 1V signal and produce a -5V to 5V signal. I would like to do this with one of the INA series instrumentation amplifiers. I feel it would be easiest to have one of these units produce a gain of 10 and then offset the signal by 5V...
    on Jul 9, 2009

  • Forum Post: Why is two op-amp instrumentation amp not recommended?

    Jonathan9420
    In Section 2.6 of " A Single-Supply Op-Amp Circuit Collection ", it says "However, this topology is not recommended because the first op amp is operated at less than unity gain, so it may be unstable." But: I t looks like both of the op- amps are in a non - inverting configuration...
    on Nov 17, 2009

  • 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: Re: INA326 EMG amplifier

    jainu jogani
    Hey, I was thinking of designing an EMG amplifier using INA101 . However, I want to limit my system to 5Vdc supply or up to 9V battery operated system. What kind of Instrumentation Amplifiers will work well for this purpose. I am thinking of trying INA333 . Please let me know if it will work. ...
    on Mar 4, 2011

  • Forum Post: INA333 problems

    Gianpietro Favaro
    Hello to everybody. We are users of INA333. The device is used, in large quantity, in EEG amplifier (64 units per device). We noticed that parts marked on the bottom as W4EE suffer from instability in large percentage (>10%). We need to replace defective parts with units of different lots (e.g...
    on Apr 21, 2011

  • Forum Post: Re: OFFSET TRIMMING INA333

    Bruce Trump
    Sometimes a +/- input signal voltage is converted to a digital value with a unipolar A/D converter. A half-scale voltage is applied to the Ref terminal of the instrumentation amplifier so that a 0V differential input voltage is shifted to half-scale of the A/D converter. This allows bipolar signal processing...
    on Jul 11, 2011

  • Forum Post: Amplifier for chemical oscillator

    Sam Kenny
    Hi, I'm a chemist at the University of Minnesota studying oscillating chemical reactions. I'm using a Pt electrode to electrically monitor the oscillations, and a Vernier voltage probe to record the oscillator voltage over time. The chemical cell produces roughly a sine wave with a period of...
    on Aug 2, 2011

  • Forum Post: Load Cell Amplifier ( Large Temperature Range )

    ismail cetinkaya
    I have designed a load cell amplifier with three opamp in amp. I use this amplifier in baby incubator project. I have sensor module inside incubator and my amplifier circuit is in the module. Module temp can be 45-50C some times because of settled temp of incubator. So , my amplifier out changes +-20mV...
    on Nov 26, 2011

  • Forum Post: INA193 - Common mode issues

    osmont jean-baptiste
    Hi , I plan to measure a current through a sensor resistor. Specs are following : • Common mode : 0 to 51V • Current : 0 to 5A • Max drop voltage : 100mV • Settling time : 5µs According to specifications, it seems that the INA193 suits well to this application The simulation...
    on Jan 16, 2012

  • Forum Post: Re: INA193 - Common mode issues

    osmont jean-baptiste
    Hello Pete, First of all, thank you for your answer. Unfortunately I have also an current measurement stage with a negative common mode. It'd be better for us to use the same part for all current measurement stages. So I might have to trust INA193 specs and validate the current measurement...
    on Jan 17, 2012

  • Wiki Page: Instrumentation Amplifiers—they’re not op amps but what are they?

    Bruce Trump
    Instrumentation amplifiers (IAs) are complete closed loop amplifiers with feedback components. They amplify differential input signals while rejecting common-mode signals. Though internal designs can vary, the commonly used 3-op-amp topology (figure 1) is representative. Many types allow gain selection...
    on Apr 3, 2012

  • Forum Post: RE: 20Mohm input impedance with OPA277

    Bruce Trump
    Jatin, Scaling the resistors of a difference amplifier to 10M ohms creates a variety of problems. I suggest that you change to a three op amp instrumentation amplifier such as the INA128. This type of amplifier has buffered inputs that provide very high input impedance. For a discussion of this type...
    on Sep 4, 2012

  • Forum Post: INA333 Output Decay

    Simon Attard
    Hi all, We are using an INA333 instrumentation amplifier to couple a pressure sensor to an ADC. Below please find attached the circuit of the diagram we are using. The problem with this circuit is that when the output of the pressure sensor is constant, the output of the IA circuit is seen to decay...
    on Jan 8, 2013

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