Analog and audio

Hello,while the formating of the operational-amplifiers-op-amps-quick-reference-guide https://www.st.com/resource/en/brochure/operational-amplifiers-op-amps-quick-reference-guide.pdf may be good for a printed handout, it is very annoying for online reading the pdf file. Please consider a single page format for the online version. As overview it could be very usefull if formating was not that strange.

I have image of an IC and I am not able to identify what is the component and part number  Please support.

Hi, Im working on a project which need using a op-amp and a comparator. In that matter I’ve looked at the tsv6395 which have great spec as an op-amp, but i wonder if it is acceptable to use one channel as comparator? the signal is about 100hzThanks for any advice,Mg 

Is there any option to control output volume in Power IC FDA802?

Hello, and thanks in advance for your help.  I'm trying to debug (repair) an old circuit board on which we have a 14 pin surface mount chip with the labeling, ST EZFT V6294AI MRC021. Is this one of your chips? If so, is it possible to get a datasheet, or at least a pinout as a couple of the pads have lifted from my board and I'd like to know if those pins are critical to the functionality, ground, or maybe even NC. (@Peter BENSCH I saw your reply in this thread about product markings and thought of asking you directly, here, too.)   Thanks very much and Happy New Year to you all.  

Dear All，when we submit IMDS for SMA6T28CAY, we fail to mark polymeric parts as below. pls help to advise how we can make it. Thanks.IMDS #：190311

hello.I'm currently testing a 2-axis joystick connected to an ADC120.I want the X and Y axis values ​​to go into IN0 and IN1, but only the X axis values ​​go into all channels. The channel changes normally, but is it possible to separately input 2-axis data into IN0 and IN1? ?I can show you my code if you need it. thank you

HelloI would like to confirm with you the power on reset behavior of TS334.When I power up the comparator, I see a high level impulse during power on.I guess there is a power on reset behavior of TS334. In the following figure, the blue curve is the supply voltage, the yellow curve is the output of comparator.I guess the POR time of TS334 is roughly 50us. Could you confirm this? 

Dear Support,Please advise what are the differences between part numbersATIC224-CC and ATIC224-CA?KIndly confirm if they can be used interchangeably. Thanks

 Hi,  I use ADC120 my new project, but device get only convert first channel. I change channel but its gives only first ch.There is a ST demo bord at web site but there is a no example code. How can i solve this problem.I read same topic in this web site, and apply the suggestion soltion but i could not any get result.Thank you.

Hi, im trying to find out the gain from the TS922EIJT used inside the STEVAL-STWINKT1B evaluation board. Here is where the opamp is used.So far, i have simulated the schematic using LTSpice and got a gain of -80 dB (see attached screenshot of the circuit)Is this gain correct? I saw the open loop characteristics inside the documentation of this opamp and this here looks nothing like it. Since im calibrating my system i have to know the gain of this opamp. Is the unit in dBV or dB? And if it is in dBV, is it normalized to dB re 1V/Pa?

Hi, I'm wondering if it is okay to connect 2 16ohm headsets in parallel to the ts482idt stereo amplifier. This would mean that the output load is now 8ohms but the datasheet only mentions 16 and 32 ohm loads. What if any issues would I encounter in this configuration? Thanks,  

In your application note, AN4835, you are using resistors R2 and R3. Please can you explain their purpose?My circuit uses the TSZ121 precision op-amp in the classical method without R2 and R3 and it works equally well. Thank you very much for any insight you can provide.Best regards, TK1   

We need to use the ADC chip ADC120 within our design, unfortunately the readout process that we perform only outputs channel IN0 data as output, regardless what we set in ADD2, ADD1 and ADD0 bits. I am not sure how to change the channel, but following the datasheet the SPI waveforms looks ok.We came from a design where the TI ADC128s102 (pin to pin and SPI waveform compatible with ADC120) was the selected part, and appliying the same program the channel selected is read without any problem.Please find attached the oscilloscope screenshot.Thanks in advance.​

I am using ADC chip ADC120. ​Data is output, but the channel is not changed, so only IN0 data is output.​The SCLK goes low and data is entered in DIN.SCLK goes low and DOUT is read.​I am not sure how to change the channel.​Please help.Thanks.​

Dear Sirs! I use in my design LMV321LICT manufactured by STMicroelectronics. And I faced very strange behavior.LMV321LICT powered by +3V in mode of buffer or non inverting amplifier.When for example there is +1.5V DC in plus input and gain 2, I see about +3V in output (no load).. It really work as rail to rail amplifier as expected.But when there is +3V DC in plus input and gain 1, I see about +2.5 V on output (no load) but I expected to see +3V.I have not found in datasheet any limitations about input voltage.Can you please explain?Is it a correct behavior for this amplifier or something wrong in my board?Best regardsMichael 

Hello,There are 8 optical front-ends on the board ... the front-ends based on TSV771 (or TSV772, TSV782, TSV791, TSV792).Is it important to use one LDO per front-end or powering all 8 frontends by a single LDO will be also Ok ?Thanks.

I am trying to identify a chip with an ST marking. It is an SOIC-14 and appears to be identified with the markings 247. There are more markings on the package, but they vary from package to package and I suspect they are some sort of manufacturing and/or date code.Based on the circuit the IC was found in I believe it's some sort of audio processor or transceiver.

Is L7805ABD2T-TR type A or B D2PAK? Ordering information doesnt have any designation to order Type A or B and I am not sure what type is L7805ABD2T-TR.

Hello.I would like to know about the error of TSB582 consumption current.Please let me know if there is a figure between it's consumption current (or quiescent current) vs. supply voltage for the number of parts, and data on minimum and maximum consumption current.Thanks.

Looking to add FM HD into my project.Digikey suggests the TDA7706 is Obsolete, while the ST website says its active.Looking for a recommendation that will be supported into the future.Also looking for additional datasheet information, and register maps, etc.Thanks!

looking to identify this IC, it's most likely from the mid to late 70s and my own hunt has turned up nothing, I would expect it to most likely be some form of amplifier as it is used in a preamp circuit. Any help would be appreciated, thanks!Fergus.

Hi teamI am using TS9222 ( two stage inverting buffer) op-amp as a microphone pre amplifier. it will acts as a voltage follower. Resistor set in the inverting input and feedback is 47K. capacitor in the feedback is 100pF. this is repeating twice(two stage).  In the non inverting input it is pulled to vcc/2. My aim is to measure the input and output impedance of this amplifier using bode 100 tool. Please share the impedance analysis procedure if you have( bode 100). Any other method or tool recommended ?. Can i try the same in ST simulation tool?I used impedance analysis simple method also. I tried output impedance analysis method, I am getting distorted output (expecting half time input voltage without any distortion) if the load impedance becomes less than 1.6K for 2.5V+ 1Vpeak( offset+ ac) 1KHz sine wave input. This is not good way to use max power transfer theorem since voltage is clipping below 1.6k. I am getting 15K as the input impedance in the same way. 

Hello guys, Newbie here and was wondering if you can help.Was looking for MEMS microphones to enhance predicitive maintenance and cam across the IMP23BSU and seems like it is pretty suitable to enhance predictive maintenance. Although, in industrial environment (with lots of noise) is it still suitable to be installed on the outside of an AMR for specific noise detections?Any tips of other microphones that can be used?Thank you

Hello,can we connect the exposed pad of the TSB582IDT to GND in the PCB layout?There is nothing mentioned in the datasheet regarding the exposed pad.