Analog and audio

I bought this chip and pcb circuit from the internet, then when I plugged all the components into the pc and powered it up, I couldn't get any sound. When I powered up the circuit, it got hot inside, but only a low sound came from one speaker pin, but it didn't reflect the sound I gave to the speaker in any way. Also, this heating situation happens when there is no st-by short circuit. When I checked it with the short circuit-diode stage of the multimeter, when I filled the capacitor a little and touched the legs of the channel with low sound to GND, it showed a short circuit and stopped after a while, so I think there is a short circuit between the power input and the channel with low sound, and when I touched its negative end to GND and the other end to the output of the channels, I see 600 in the outputs without low sound, while I see 70 and 100 in the channel with hiss. These are what I found for now, thank you very much if you can help. Also, I want to ask something, do we need to

Hi. I bought a multimedia screen for my car that I wanted with the TDA7803 chip, but the seller sent me a unit with the TDA7808 chip. I'm noticing that the chip is getting too hot. I am using speaker system with less than 4 ohms. That's why I wanted my unit to have the TDA7803 chip, which according to the data sheet supports impedances of less than 2 ohms. The TDA7808 only specifies its use for impedances of 4 ohms or more. What I wanted to know is if by changing the chip for a TDA7803 I could expect it to work at lower temperatures. The replacement job is simple. And I will surely have to program the TDA7803 via I2C bus using an Arduino board for example.

I am currently working on repairing a Taramps MD3000.1 car amplifier. There is an ST chip with the following markings: 319MZLBD38 or it could be MZLB038.I'm not sure what it is and am having quite a time finding that out. I appreciate any feedback!

Hello -We are having issues with EMC compliance with the TDA7492E. We have broadband radiated EMI between 100MHz and 200MHz that is above the limits. I've included a screenshot of the testing lab's report with the radiation. I've attached our schematic for the amplifier circuit. It was derived using the example datasheet for the TDA7492E. I've spent a fair amount of time having a look at the circuit in operation - I do not see any large ringing on the output square wave, so I believe the filter layout and tuning is good, the snubbers appear to be doing their job. I am currently testing with a 1KHz sine input at 1/8 power into an 8ohm load resistor. I did notice the input signal has tons of HF noise on it while the TDA7492E is on (screenshot attached). The HF noise is in the 100MHz - 200MHz range.My current working theory is the HF noise is coupling into the amp input signals due to layout issues. We have one PCB with 6 of these amp chips on them, and consequently the input line level s

Hello, I have a guitar amp Laney LA65C where the output amp is faulty, it consists of a TDA7294 IC, I put in a new TDA7294 but it exploded as soon as the power was turned on. I checked the input voltage and it is correct 26 volts, what could cause it to explode, are there several versions of the TDA7294 with other supply voltages? There is no insulation between the circuit and the heat sink, but the heat sink has no contact with the device body.  

I am wondering why they use a thermistor to monitor temperature when they have a reference detector?https://www.st.com/resource/en/application_note/an5571-signal-conditioning-for-ndir-sensor-stmicroelectronics.pdf  

Do ST has spice model for opamp ? Especially TL062 

我现在想用stm32F407系列的spi口来采集mp34dt05的PDM麦克风的数据，但是我发现我采集到的pdm数据流基本上不会因为我的环境变化而产生任何变化。你能详细告诉我spi是怎样的吗？要接收mp34dt05的数据，麦克风芯片mp34dt05有驱动文件吗？如果有的话可以发给我吗？感谢您的关注。Translated from Chinese to English: I am now trying to use the spi port of the stm32F407 series to capture data from the mp34dt05's PDM microphone, but I find that the stream of pdm data I capture basically doesn't change in any way due to changes in my environment. Can you tell me in detail how the spi works? To receive data from the mp34dt05, is there a driver file for the microphone chip mp34dt05? If so can you send it to me? Thank you for your attention. Translated with DeepL.com (free version)  

Hello, I am attempting to identify a component from a switch mode power supply out of a audio preamp.I am 90% confident it is a zener diode, but after that I am at a loss. Markings (cathode band on left):(ST) 98ZKW  *not sure if there is a space between K and W, might be ZK W Measurments (in mm):2.78 W --> case4.15 L --> case5.30 L --> case w leads2.11 H --> case2.25 H --> case w leads Any assistance is greatly appreciated. Kind Regards, Rick  

请问如何购买STA309A评估板？你们提供技术文档支持吗？Translation to EN: How can I buy the STA309A evaluation board? Do you provide technical documentation support?

Hi Team, @Peter BENSCH  I want to process PWM HART signals of 1.2 KHz/2.2KHz. Will the op-amp TSX631A be suitable for this application which is having a bandwidth of 200 KHz?  Regards,Sreejith R Nair

Hi,@Peter BENSCH In the datasheet of ST LMV321ILT op-amp, it is stated that minimum voltage supply span is 2.7V and maximum supply span is 6V. Can you suggest whether LMV321ILT can be used with 3.3V or an alternate that is both pin to pin and 3.3V compatible? Also, the VOH VOL characteristics are defined for VCC=5V and VCC= 2.7 V. Could you also provide VOH VOL levels when VCC =3.3V if the op-amp is compatible with supply of 3.3V? Regards,Sreejith

Could you advise me if there are an explanation of the energy loss seen on the Sic mounted on the PCB which is higher than the energy loss on the Datasheet .Thanks ,

Hello,Is there a TDA7294 spice model? I am an engineering student doing my Bachelor's audio project and would help me in the development of the project.Best,João Santos

Need to replace this. I'm assuming the one on the left is toast just from a visual inspection. Can someone tell me which specific version I need to get? I'm not sure if the "EZ605" designator means anything. Any suggestions are appreciated. Thanks!  

Hi, I hope finding an answer this is my first time asking you.  So, I'm trying to build a CLASS_D AMPLIFIER with codec (STA309A). This codec has 8 input channels for serial AUDIO and I want to play more channels for the codec's inputs but the I2S can only transmit the data in stereo mode. 

Dear all, the first of all thanks for let me leave a message in this post.We have a schematic circuit, with the LM324 it works but with the LM358 doesn´t work. It gives the correct voltage in both chips in the output, I connect a relay solid state from Carlos Gavazi and with the LM324 works and with the LM358 doesn`t works. the differents inside the chips are ( picture attach).I check the mA output and all is correct. the consume of solid state relay is only 10mASomebody have this error? Which difference the are between the LM324 and LM358? could somebody give me a refference form a LM324 in two cannels? thanks in advanced Thanks in advanced. 

Hi, I made a circuit for the TDA7292 with a simple power supply as shown in the brochure. The standby and off functions work well, but the low tones become distorted when I increase the volume more. The circuit works with 12VDC. Is it because more DC voltage is needed? or do you have to make an additional modification to the output?Thanks in advance.

please help to  provide the SGS report of TSC200IST for Goertek

Hi, I was wanting to know that if I only use one channel of the TDA7297, say input 1, but not input 2, how should I handle the unused channel? Should I just leave the unused input floating, or should I tie it to ground, or tie it to ground via a resistor? Thanks,Erik

Hi!I have LMX358IQ2T device that has burrs on the edges/pad.  I would like to know if this is OK to use.Do you have any criteria on accepting or rejecting burr problems on non-leaded devices?   

Hi,1. Is there a SPICE model available for this part?2. Is the output open-drain or push-pull? Cheers,Kay

Why does ST not provide a spice model for a new opamp. Specifically the TSB182 ?New parts should have a model.No model , not going to be considered  for use.On  another note  ST's website is almost unusable. I get HTTP 408 and 504 errors almost everywhere I go , very frustrating.

Hello,We currently use diode 1N5711 in an array. It would be beneficial to have matched batches as mentioned on the website 1N5711 - 70 V, 15 mA RF and Ultrafast Switching Signal Schottky Diode - STMicroelectronics.I'd like to know more about the matching process and what the deliverables look like. Customer support sent me here to connect with an apps engineer._Chris

I am using STM3210C-EVAL board. It has a audio jack port. Datasheet says i can play audio but i couldn't find anything about audio input.My question is:Can i record audio using a 3.5mm jack microphone via this jack input? And does this jack port support I2S protocol?If not, what is the best way to get audio input?