Forum Post: RE: MIC Preamp alternatives for INA163
Thomas,You may want to consider the PGA2500 or PGA2505. These devices are intended for Low-Z microphone inputs have digitally controlled gain. This would greatly simply the gain switching in high gains...
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Forum Post: RE: RTD Sensor with OPA2335 Problem
The ADC I am using is from Phidgits http://www.phidgets.com/products.php?category=0&product_id=1010_0The corner frequency is around 250HzChebyshev ApproximationGain 30.41V/VI am attaching the...
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Forum Post: RE: RTD Sensor with OPA2335 Problem
Tusjar,You are correct. This filter will oscillate. I am using your inputs and finding that the resistors and capacitors are not correct. My recommended circuit would be:There are a few things that I...
View ArticleForum Post: PGA281 power sequence
Hello I need your suggestion on power supply sequence on page 21 Figure 45, DVDD on first, then delay time with RC on VSOP and final 2-times delay time on VSP,VSN. On page 20, However, "DVDD must be...
View ArticleForum Post: under the power supply of +5V, can PGA309 output absolute 0 v? or...
on PGA309 zero offset:under the power supply of +5V, can PGA309 output absolute 0 v? or only output 60mV?
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Forum Post: MPY 634 AM Modulator
Hi,I want to use MPY634 for AM modulation. I used basic multiplier connection mentioned in MPY634 datasheet.I have following issues:1) When I connect carrier signal on X1 I become on X1 an input...
View ArticleForum Post: RE: A Query about servo integrators on the "Ref" pin of the...
Hi Matt and TI,I understand that integrator is shown like a HPF on signal path. Since integrator works that way a 1-pole HPF the Boden are the same in both the passive RC HPF and integrator. So why to...
View ArticleForum Post: RE: Water sense with AC Signal - Cutoff Design
Hi Jamieson,I have no room to put ultrasound or proximity sensor It's generator tank - I have only small Entrance\inlet in the generator to put there a prob of metalRegards,Mayer
View ArticleForum Post: RE: Ph electrode and Reference electrode amplifier recommendation
Hi Deepak, 1. One of the problems I would like to solve is the noise introduced in the circuit by fluorescent light in the lab room. How can I solve this problem? 2. Secondly, I want to avoid any...
View ArticleForum Post: RE: under the power supply of +5V, can PGA309 output absolute 0...
Hello,The limiting factor of the PGA309 minimum output voltage is the output stage amplifier.With a +5V power supply, the output range is from 0.1V to 4.9V.The typical calibrated output voltage range...
View ArticleForum Post: RE: OPA454 - Device Overheating
Hello Sandeep, In your schematic, the OPA454 is configured in a non-inverting gain of 90. If your input reaches 1V, you might be exceeding the output voltage swing limitation of the amplifier. Does the...
View ArticleForum Post: RE: MPY 634 AM Modulator
Hello Petr,I do not think the MPY634 figure 9 circuit can be used for direct AM demodulation. AM can be demodulated using the multiplier as a product detector, but a signal having the same frequency as...
View ArticleForum Post: RE: AFE031 SPI Trouble
Hello Jose,Thank you for your answers first.I have read the value of AFE031 Registers,but the value of RESET Register is 0x40,which means I_FLAG is 1.I think this is a error but I dong't know why.And...
View ArticleForum Post: THS4531A vocm low frequency noise
I require the THS4531A to have a low noise output at DC. The datasheet suggests using a 220nF capacitor on the Vocm pin to reduce noise.I tried a simulation in TINA using a unity gain configuration...
View ArticleForum Post: RE: PGA281 power sequence
Hello. thank you for your comment. I try to make sure there is no conflict on power supply sequence on PGA281. Even If there is no analog i/p. Yes, DVDD is "usually" less than VSP. But if i supply...
View ArticleForum Post: RE: Ph electrode and Reference electrode amplifier recommendation
Hi! I would like to share this great online resource for anyone seeking a pH electrode : http://www.directindustry.com/industrial-manufacturer/ph-electrode-75414.html
View ArticleForum Post: RE: PGA281 power sequence
Hello Rungsimant,The condition that DVDD must be at least 1V less than VSP applies once the power supply rails have fully turned on and stabilized. The microseconds during power on where DVDD comes up...
View ArticleForum Post: RE: Why is noise specified in root Hz
Hello Hithesh,Noise guru Art Kay covers this thoroughly in the second of his Noise article series (and later book).EnGenius seems to be slower than usual today, so here is a local copy:...
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Forum Post: RE: THS4531A vocm low frequency noise
Just to clarify the question in my previous post I have included the TINA schematic and simulation outputs:I had assumed the very high noise below 1Hz with the 220nF capacitor was caused by the high...
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Forum Post: RE: INA 128 output issues
John,Thanks for your detailed and helpful reply. I have performed some tests and hereby the results:INA118The results are not better as I expected. I was wondering if I made something wrong.INA333 , I...
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