Precision Amplifiers

Browse by Tags

Precision Amplifiers

Welcome to the Precision Amplifiers Section of the TI E2E Support Community. Ask questions, share knowledge, explore ideas, and help solve problems with fellow engineers. To post a question, click on the forum tab then "New Post".

Tags
You have subscribed to this tag. To view or manage your tag subscriptions, click here.   Close
You have unsubscribed from this tag. To view or manage your tag subscriptions, click here.   Close
You are currently viewing:
INA333
Related Posts

  • Forum Post: Re: INA326 EMG amplifier

    Matt Hann
    Hi Paul, I looked over your circuit and there are a couple of things that I noticed that could be improved. With regard your INA333 gain--according to the schematic you are using a gain of 11 which is a little bit on the higher end considering you have electrodes that are prone to higher offsets...
    on Nov 18, 2009

  • Forum Post: Re: INA326 EMG amplifier

    Matt Hann
    Paul, Actually, in light our dialogue, would you mind posting your "resanitized" version? This way any one who is following the thread can see the differences that we are discussing. Your phase margin looks good with a gain of 20--simulation shows about 60 degrees of phase margin in your...
    on Nov 20, 2009

  • Forum Post: Re: EEG system first stage after RC low pass filter below 20Khz I liked LT 1168 I could use some help getting a TI chip that is better

    Nichole Oljaca
    Hi Josh, What is the supply voltage that will work for you? The reason I ask is that the LT1168 and the INA121 are dual supply devices and the INA333 is a single supply device. That may shape your choice. In terms of performance, see below for a quick rundown of comparison with min's and max's...
    on Feb 17, 2010

  • Forum Post: INA326 ECG design questions and problems

    Xijun Chen43069
    Dear all I am a student working on ECG amplifier design. Basically, I followed the design and suggestions from the a paper (see below link) with modifications using INA326 and OPA333/2333. In addition, I have read through the subject of <<INA326 EMG amplifier>> in this forum. ...
    on Feb 19, 2010

  • Forum Post: Understanding active filters used in INA333 example EKG app

    jonricmd
    Hi, I'm in the process of learning about Op-Amps and In-Amps, particularly with respect to EKG applications (I'm a doctor). In figure 37 of the INA333 datasheet, I understand the 150 Hz low pass filter, but I cannot figure out the 0.5 Hz high pass filter. Technically, it is a low pass filter...
    on Jun 25, 2010

  • Forum Post: Re: INA333 EMG Instrumentation Amplifier

    Bruce Trump
    Jacek, Low input bias current is desirable because it reacts with electrode contact resistance to create an input voltage that is not related to muscle activity. It is generally the variation in contact resistance with motion or movement that creates undesirable artifacts. The guideline you cite calling...
    on Dec 2, 2010

  • Forum Post: Problems in building a front end with INA333

    Sergiu Man
    Hello I have some problems in simulating a front end amplifier. No operating point found error appears for both of the posted circuits. I cannot understand the problem. The final circuit shoud be an EMG front end amplifier. I would rely appreciate any help.
    on Jan 5, 2011

  • 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: INA Selection

    Neil Albaugh
    David; The INA333 was designed especially for your type of application. Check out its data sheet. Regards, Neil P. Albaugh ex-Burr-Brown
    on May 12, 2011

  • Forum Post: Re: INA12* Large Offset Problem

    Neil Albaugh
    Matthew; The INA128 & INA129 are nice devices but they are not universal-- they are not rail-to-rail amplifiers. In the data sheet they are specified down to +/-2.25V power supplies, not +5V. In your application an INA333 might be a better choice.
    on May 24, 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: INA333 operating point not found error message

    Larissa Swanland
    Are we missing a parametre adjustment at all? The below was created uses only the default TINA-TI settings. Attaching screen shot: From Page 15 of the INA333 Datasheet.
    on Aug 5, 2011

  • Forum Post: Re: INA333 Resistive Load Required?

    Neil Albaugh
    1266301; An INA333 should not require a load resistor. Make sure you are within the required common-mode input voltage; single-supply operation puts limitations on CMV and output voltage swing (see the data sheet). BTW, the most common method of offsetting the output to keep it away from the rail...
    on Nov 4, 2011

  • Forum Post: Re: INA333 Resistive Load Required?

    Neil Albaugh
    1266301; If the INA333 output is clean when your converter is removed, I'd guess that you need to buffer the output of the INA333 before connecting it to the converter. Micropower amplifiers do not have wide bandwidth or very low output impedance.
    on Nov 4, 2011

  • Forum Post: Re: Use INA333 with single power supply

    Neil Albaugh
    Enid; What is your common mode voltage?
    on Nov 9, 2011

  • Forum Post: Re: OPA2277 with single supply

    Neil Albaugh
    Shrikant; For a thermocouple amplifier you may be better suited to an instrumentation amplifier. It has high common mode rejection and can provide high gain. One of TI's +5V CMOS amplifiers such as an INA333 may be your best bet.
    on Nov 28, 2011

  • Forum Post: Re: INA333 output problem (EMG active electrode)

    Neil Albaugh
    Alvaro; Notice the data sheet CMV specification: "Common-mode voltage range V CM V O = 0V (V–) + 0.1 (V+) – 0.1 "
    on Jan 2, 2012

  • 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

  • Forum Post: INA333 Gain Calculation

    David Escandon
    TI Team, The gain calculation shown on page 14 of the datasheet--an application circuit--shows that the INA333 has a gain of 10. I'm assuming that this value is derived from the RLD drive circuit, in series with the RG resistors 2.8K. The combined resistance is 11.4K, which results in a gain close...
    on May 9, 2012

  • Forum Post: RE: INA333 Gain Calculation

    David Escandon
    Bruce, I've attached my .jpg file and the TINA circuit file. -David
    on May 10, 2012

  • Forum Post: INA333 ECG application

    Anish Joshi1
    Hello, We are working on ECG application of INA333 and OPA333. We are having a few problems as follows- 1. INA333 Gain - Theoretical gain does not match practical gain. Equation given in datasheet cannot be verified practically. for Rg=5k, Vin= 20mVp-p Sinewave + 0.5V DC offset --> Vo...
    on Dec 28, 2012

  • Forum Post: RE: INA333 ECG application

    Bruce Trump
    Anish, I believe that you are probably not biasing the input signal in a linear range of operation for the INA333. Try increasing the common-mode voltage of the input signal to 2.5V. Inspect all waveforms to look for possible distorted AC signals. The INA333 will provide the expected gain when biased...
    on Dec 28, 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

All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with respect to these materials. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.

Content on this site may contain or be subject to specific guidelines or limitations on use. All postings and use of the content on this site are subject to the Terms of Use of the site; third parties using this content agree to abide by any limitations or guidelines and to comply with the Terms of Use of this site. TI, its suppliers and providers of content reserve the right to make corrections, deletions, modifications, enhancements, improvements and other changes to the content and materials, its products, programs and services at any time or to move or discontinue any content, products, programs, or services without notice.

TI Worldwide | Contact Us | my.TI Login | Site Map | Corporate Citizenship | mobile m.ti.com (Mobile Version)

TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs and
embedded processors, along with software, tools and the industry’s largest sales/support staff.

© Copyright 1995-2013 Texas Instruments Incorporated. All rights reserved.
Trademarks | Privacy Policy | Terms of Use