Ultralow Noise. BiFET Op Amp. AD 2. The combination of low voltage and low current noise make the AD ideal for charge sensitive applications such as . AD datasheet, AD circuit, AD data sheet: AD – Ultralow Noise BiFET Op Amp,alldatasheet, datasheet, Datasheet search site for Electronic. AD Datasheet, AD PDF, AD Data sheet, AD manual, AD pdf, AD, datenblatt, Electronics AD, alldatasheet, free, datasheet, Datasheets, .
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If you have further questions related to this thread, you may click “Ask a related question” below. In reply to Ron Michallick:. These new op amps provide excellent accuracy, lower noise and modern packages with much lower quiescent current. In reply to Bruce Trump:. The fact that the question is about the AD and LF indicate the questioner knows a thing or two. These two parts are special to the designers of high-performance transimpedance amplifiers, or TIAs as we like to call them.
First, the AD has a quiet 2. This compares to 5. Analog Devices is deprecating the AD, in part because they never offered an SMT version, and if you were smart you’d step up to the plate with a replacement to help those of us who are struggling to get along without it. Then you could claim to have a best-in-class part. Now about the National Semi LF This part was not xd743 inexpensive, it had only 3pF of input capacitance, and it offered 20MHz of bandwidth.
[Resolved] TI equivalents to AD and LF – Amplifiers forum – Amplifiers – TI E2E Community
Your OPA and offer only half the speed, at 11MHz, and they suffer from more than twice as much capacitance. Certainly not exemplary, as you claimed, Bruce. Why not make a decompensated OPAxxx part? Now that NSC is part of TI, maybe it’s time to look at some of their best-in-class stuff, and consider what to do for the datashete two decades. In reply to Winfield Hill:. Thanks for your comments. To be honest, I was working from memory and I forgot about the low broadband noise of the AD, but more on that later.
You more accurately read between the lines. I have to admit that my recommendations were directed toward the most common objections to previous generation JFET op amps. You have focused your assessments specifically on performance attributes important in some TIA applications. Our JFET op amps are used in a very wide range of applications so that is what triggered my response.
The AD is an interesting and rather specialized amplifier. And it burns high quiescent current 8. Still, the AD has very low broadband noise and so, as you point out, with very high photodiode capacitance, it would have an advantage.
The OPA datashedt somewhat higher in broadband noise but lower input capacitance so it might be better suited for photodiodes of more moderate capacitance. General wd743 benefit from the lower quiescent current, wider bandwidth and lower input bias current of the OPA 1.
Furthermore, the OPA has lower flicker noise than the AD; in many applications this is as or more important than the wideband noise. The LF is ac743 interesting case. You and I share an appreciation for decompensated amplifiers. But our customers vote by placing orders. Our customers strongly prefer the unity-gain stable versions of the same amplifiers.
My experience is in the Burr-Brown product line but my new colleagues confirm the same experience with LF vs. The LF is active and the LF is obsolete.
If we could drum up interest we could make, for example, an OPAtype design, decompensated, a bit higher noise and lower input capacitance. The year-old OPA is still extremely popular and very available. The LF and AD are now obsolete or not recommend for new designs.
Customers have voted and the balanced performance tradeoffs made in the OPA across a wide range specs are well recognized. We have a few old decompensated amplifiers. In spite of the lower sales of this special version, we will continue to support it. TI does not obsolete products for our mere convenience or low sales. At the same time, we try not to create new ones. Bruce and othersthis is an old thread, but I’d like to pick it up again.
The OPA and its family are rather unique in being able to work to the rails, and especially the negative rail as a single-supply amplifier. I think you called it a FET amplifier, didn’t you? Is it partially FET and partially bipolar? It’d be nice to know more about its input stage, etc. While we don’t intend for this to be a secret, we wanted designers to judge it on its features and performance, not its fabrication process. Datashdet has capabilities that many engineers might find surprising for CMOS.
It has a dual input stage for rail-to-rail input behavior but we stop just short of calling it “rail-to-rail input. For many users, the performance distinction is subtle. Other IC manufacturers might call it rail-to-rail.
Ultralow Noise BiFET Op Amp
It could have been designed to meet our full rail-to-rail standards but this was a product definition choice with some attendant trade-offs. 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 datasbeet non-infringement ax743 any third party intellectual property right.
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TI is a global semiconductor design and manufacturing company. Menu Search through millions add743 questions and answers User. Mentions Tags More Cancel. Ask a related question What is a related question? Ask a new question Ask a new question Ad43. Go to Support forums. Due to the holidays, responses may be delayed. This thread has been locked. Please advise me TI equivalents to: Dec 12, Hello Alex Baikov, Here are the crosses using http: Do you have another question?
We are glad that we were able to resolve this issue, and will now proceed to close this thread. Ask a related question Ask a new question. Dec 12, 3: In reply to Ron Michallick: Feb 20, In reply to Bruce Trump: Feb 21, In reply to Winfield Hill: Winfield, Thanks for your comments.
Thanks again for your comments and expert opinions.