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high-speed op amps
Related Posts

  • Forum Post: Low Power, High-Speed Op Amp - Application Report SBOA121

    Karen
    " Making the Most of a Low-Power, High-Speed Operational Amplifier " by Xavier Ramus looks at several Texas Instruments low-power, high speed operational amplifiers and describes the trade-offs of balancing low quiescent power with performance.
    on Dec 4, 2009

  • Forum Post: transimpedence amplifier

    valmik patel
    I am new to the field of analog design. I am working on a project in which we are designing a data acquisition system for an array of 4x4 photodiodes. Initially we plan to use individual photodiodes from OSI optoelectronics(HR040) to test the concept. I was thinking about using OPA656 as a transimpedence...
    on Mar 2, 2010

  • Forum Post: THS4520 Spice Model for Multisim

    Emeric Bennett
    I tried to use the Spice Model provided on the TI product folder for the THS4520 in a Spice simulation using Multisim, but I get the following errors: ------ Checking SPICE netlist for SpiceVoltAmpTest - 2010-06-29 18:18:23 ------ SPICE Netlist Error in schematic RefDes 'u2', element 'e_u2'...
    on Jul 4, 2010

  • Forum Post: THS4521 application

    Thibault
    Hello, I'm currently designing an analog amplifier chain, for a power-sensitive application using an 16bit ADC with a 2Vpp input span. I would be a fool not to use the THS4521: Such performances for a such low Iq! I have 2 concerns : 1) Vocm specs are a little confusing (typical values outside...
    on Aug 26, 2010

  • Forum Post: Differential and Single ended impedances and return loss

    Luis M Brugarolas
    These are general purpose questions arisen from studying PGA870 (High bandwidth Variable Gain Amplifier) data sheet: Q1.- Return loss specifications and plots for differential input (fig 36) are impressive: better that 40 dB for 300 MHz and up un a Zsys of 150 Ohm. However, differencial input impedance...
    on Feb 8, 2011

  • Forum Post: Noise in transimpendance amplifier with OPA847

    Luis M Brugarolas
    I am designing a Transimpendance Amplifier for a photodiode with OPA847, which has excelent bandwidth and noise performance. I have found that noise performance is not as expected. Then, I decided to make a minimalist approach: mount just feedback resistor and make noise measurements with it. The...
    on Feb 16, 2011

  • Forum Post: OPA847 output impedance for cascade

    Merlin Cooper68095
    Dear all, I wish to receive a clarification of the paragraph on page 10 of the OPA847 datasheet which states: "If the signal source is actually the low impedance output of another amplifier, RG should be increased to be greater than the minimum value allowed at the output for that...
    on Mar 1, 2011

  • Forum Post: Re: THS4631 in a digital storage oscilloscope application

    Andy Lu74602
    Hi, Karen For an added measure of safety, I would recommend adding a series resistor at the non-inverting input. ==> What does mean? What is the value of series resistor to reach measure of safety?
    on May 19, 2011

  • Forum Post: Designing a simple integrator with THS4211

    Jim Huang77508
    Hi All, I am putting together a simple triangle wave generator for a bigger project. I already have a clean 5V, 20MHz sqaure wave with 7nS risetime/falltime. I am tyring to use the THS4211 as the opamp for the integrator portion to generate the triangle wave. I am using the model in TINA to verify...
    on Jun 23, 2011

  • Forum Post: THS4130 Heating in Fully Differential Force-Sense application

    Eric Karplus
    I am trying to use a THS4130 fully differential amplifier to apply a voltage across a 'device' for testing. The device needs to float and be located at the end of an unusual cable assembly made up of USB type cables/connectors and 0.025" pitch ribbon cable with IDC connectors. I have devised...
    on Aug 9, 2011

  • Forum Post: OPA835/OPA890

    eli
    For ADSL2+ application,customer used the OPA835,but in order to get better THD, higher P/S range,they intend to move to OPS890. Is this is the right/best recomended solution?
    on Sep 7, 2011

  • Forum Post: Question about RF Attenuation, VGA Type VCA824, alternatives with OpAmps

    Uncle Tom
    Hello. We have a system running at a fixed 175MHz. The VCA824 variable gain amp is used for Amplitude Modulation, the output voltage varies between 50mVp-p (ideally zero) to 7Vp-p. Gain accuracy/linearity is very uncritical: the amplifiers output is fed back to an RF detector in a control loop...
    on Dec 8, 2010

  • Forum Post: Bipolar constant current source for capactive loads

    Tim Boretius
    Dear all, I'm trying to build a bipolar constant current source to drive capacitive loads and I really hope you guys can help me out! My requirements: - the load is a micro-electrode, which can be modelled by a grounded C-R circuit (R~7k and C ranging from 10n to 3uF in series). As said...
    on Dec 7, 2011

  • Forum Post: Bypass Capacitors on LMH6629

    Remona Basur
    Does anyone know why the tantalum caps are needed, as stated in the Layout Considerations section of the datasheet? I found some 6.8uFs that I can use but the ESR is 7 ohms. Will this work??
    on Jan 13, 2012

  • Forum Post: Harmonic Spec THS4521

    Ronald Dekker
    Hello, I am looking at the datasheet of the THS4521. At the harmonic specs of f =1KHz Vout 1Vrms G=1 there is an note 2( Not directly measureable; calculated using noise gain of 101) Can somebody explane this note to me. Thanks in advance
    on Feb 1, 2012

  • Forum Post: THS6182 never OFF

    audic mickael
    We are using THS6182. As you can see on the schematic, the THS6182 is powered in +- 12V and Bias2 is always to 3v. When we put Bias1 to 0v, amplifier is ON, in low bias mode (cf datasheet). But, when we put Bias1 to 3.2v, the amplifier is still running instead of sleep mode. In the screenshot...
    on Mar 5, 2012

  • Forum Post: HIGH SPEED AMP

    eli
    For redesign an old board,customer is looking to to replace below old amp. with neweer/improved preformances device: 1. LM6172. I saw recomendation for LMH6655. Any other solution 2. MAX4180. Profered with integrated resistor,need low power ,+-5V
    on Mar 14, 2012

  • Forum Post: Re: LMH6624

    Andres Torre
    Hello, Thank you very much for the information, I have found it very useful. About the gain, I was a mistake writing the post, you are right about the resistors. This is my new circuit, I have followed your advices. My circuit would measure from 0-10V sensors and -5v-+5V sensors, depend on switch...
    on Mar 23, 2012

  • Forum Post: Re: LMH6624

    Andres Torre
    Hi Hooman, thank you very much for your help, If I connect +5V directly to switch left hand, output voltage increases 7.5V, so if input is -5V, OPA209 output is 2.5V instead of 0V, and if input is +5V, the output is 7.5V instead of 5V. I think I should connect the switch left hand to 2.5V. You...
    on Mar 26, 2012

  • Forum Post: Re: LMH6624

    Andres Torre
    Hi Hooman, Thank you very much for yours explanations, they are really useful for me. I think I will probably use the Zener scheme because I think it has the most stable output and it is more independent of +5V input (Because I am not sure +5V are really stable) but I think this scheme is the most...
    on Mar 27, 2012

  • Forum Post: LMH6624

    Andres Torre
    Hello, I would like to know If I can use LMH6624 to convert a signal 0-10V to 0-5V. I would supply it with +12V-0V. I have a sensor whose output is 0V to 10 V and I need to convert it to 0V to 5V because that is the input of the ADconverter. I think I should make this circuit: Uploaded with...
    on Mar 22, 2012

  • Forum Post: OPA657 Interconnection

    Martin Fulco
    I am doing an two stage photodiode amplifier, the first one is an transimpedance amplifier and the second is an non inverting voltage amplifier. The total bandwith required is 100 MHz and total gain is 1e6 (one millon). These stage work correctly separately, but when I connect the circuits in cascade...
    on Oct 26, 2012

  • Forum Post: RE: LMH6554 as ADC Driver

    David Dobrin
    Hi Hooman, I have a more general question about ADC drivers... In our application there is a need to drive a dual ADC (as it is used to digitize I and Q of a QAM signal). In this case I have to use two drivers. The question is whether there is a way to estimate the I-Q imbalance presented by...
    on Nov 8, 2012

  • Forum Post: LMH6629: Ultra low- noise and variable gain amplifier.

    Efrain Ovalle
    Hello... I working in an application where the objective is to amplify a signal which is not know the exact frequency, but is estimated between 100kHz and 20MHz. Similarly amplitude is not known, this is considered less 100nV and one might expect so small as undetectable (pV-fV). To know the presence...
    on Jan 22, 2013

  • Forum Post: Ringing THS3202

    Mathieu Stephan
    Hello everyone, I'm having an usual problem with the THS3202. If you look at my schematics here: (Please visit the site to view this file) You'll see that I'm cascading 2 THS3202, one with a total gain of 25 (2 times 5) and another with a gain of 5 (5x gain + follower). If I connect...
    on Feb 19, 2013
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