Analog and audio

I like everything about the TS92X series, I just need to know if there are any issues with operating the TS92X series with dual supplies (+5/-5V).

Hi, I'm writing a Linux audio driver for an Intel platform which requires an ACPI firmware node in order to enumerate the device. Other Intel drivers [0] use the i2c-ACPIHID:00 naming convention so I have followed this by setting the CID in my ACPI DSDT table to be "TDA7802". However, I am led to believe this is incorrect [1], and I should assign an official HID.Do ST have an official ACPI HID for the TDA7802 amplifier? If so, what is it?Many thanks,Thomas[0] https://elixir.bootlin.com/linux/latest/source/sound/soc/intel/boards/kbl_da7219_max98927.c#L27[1] https://lkml.org/lkml/2019/3/25/839

Regarding LM2902Q4T, QFN Quad Op-Amp:The datasheet doesn't define the NC pins or whether the can be connected to VCC-.It does say the center NC pad may be connected to VCC-, but not the other two NC pins.It may seem like a silly question, but I've used components with several "NC" pins with the same name but some can be connected to GND and others must be left floating; so I have to ask.Questions:Are all the NC pins "not internally connected"?May I connect all the NC pins to VCC- without issue?Suggestions:Please start explicitly defining NC pins in ST datasheets, like other manufacturers, so people don't have to ask.

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We are using your TS512 with (+/-15V rails) as a low current (1mA), 10V voltage follower. We have a test case where the output the TS512 is pulled to a 19V/100mA source for just 600us, and I am trying to assess whether this transient could internally damage Q29 or Q30 or anything else in the o amp (referring to TS512 schematics from datasheet, see also below).My understanding is that during such transient the negative feedback would try to pull the output down to -15V to counter back that transient, hence Q29 would be cut-off and R13 would prevent the B-E junction from breakdown. On the other hand Q30, I think it would be almost fully "on", which would potentially create a differential voltage across R14 of 19-(-15)=34V. The question is: 1. Would the output still limit to 25mA so would R14 be safe -and by extension TS512- during those 600us)?2. Is there any other considerations to take into account to assess the robustness of this part under this transitory?NOTE: This question and

I would like to use TSC103 in a system where the power line to be monitored is 48Vdc (63V maximum peak or steady state) and the ADC acquisition system is powered by a 5V voltage independent from the 48V line; so my doubt is if any failure can occur if the main monitored 48V line is present but 5V for Vcc is missing. Datasheet is not explicitly mentioning this operating condition, will it work without risk of damage? NOTE: This question and answer originated from a customer support case which was handled by us. We regularly review support cases and add any helpful ones here for all to benefit from.

In TS391 datasheet for max. Vol output voltage two values are specified:Under which conditions is 400mV resp. 700mV valid?NOTE: This question and answer originated from a customer support case which was handled by us. We regularly review support cases and add any helpful ones here for all to benefit from.

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In the data sheet for TSX339 it says in chapter 6.1: "The output state is guaranteed as long as one input remains within the common modeinput voltage range (defined in the operating conditions table), and the other input remainsbetween -0.3 V and 16 V (meaning that one input can be driven above VCC+)."Is the same true for LM2901, i.e. one input within the common mode input voltage range and the other input between -0.3 V and 36 V?

Hi

Hello,I am using STA326 now and try to ​make mono setting.There is descrived the 1 Channel mono-parallel setting (addr: 0x05 value: 0xDF)but looks like output volume was lower than stereo.Is there another register setting?Let me know please.

If the offset voltage drift is above 15uV/°C is there any tighter part available? 

I have built a circuit based on the tda7293 and it has burned instantly when connected.I have reviewed the layout but it has no errors.I am using Vs=36V and -Vs =-36V. The bootstrap capacitor is 22uFx50V. Is that capacitor well chosen?Do I have to use one with a working voltage greater than 2xVs?Please clarify the working voltage of the capacitors in the manual.

HI, I am using ST mosfet (part NO STP28N65M2) in High input AC voltage limiting circuit (as per AN2652) where Q2 MOSFET is STP28N65M2. and D3 diode is 6.8V zener.The product was operative from 2 month. and After that i found that MOSFET was open.on Debugging it, i found that Gate and source are showing 1V in multimeter ( on fresh sample it is open, probabbly one of the protection diode between gate and source is short)I could not able to figure the root cause why this has happe.Can you please let me know the reason for Gate to source diode getting short.RegardsManish

I HAVE USED IT IN A TEST CIRCUIT TO CHECK /VERIFY ITS SPECS.APPLIED VOLTAGE ACROSS ANODE/CATHODE IS 13.2 V DC.GATE TRIGGER VOLT IS 1.6V DC +SCR LOAD CURRENT IS 26MA. UNDER THIS CONDITION, THE SCR IS GETTING LATCHED & HOLDING ON EVEN WITHNO GATE INPUT .

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The datasheet of the TDA7294 audio amplifier suggests a bridge topology through Fig. 25 on page 13 of the datasheet. The design seems elegant as it does not use any external op-amps to generate complimentary signals.However I have a few questions/ concerns:Is this the best approach to implement the bridge topology since it uses the output of one IC as input to the next?How will it compare in terms of performance parameters (noise and distortion etc.) to the one that uses an externally generated complimentary signals?Will an electrolytic capacitor in series with the 680E resistor help minimizing the DC at the amplifier output? Should this capacitor be bi-polar electrolytic instead of polar, for better performance?Thanks in advance!!Ravindra.

Hi dear, I'm trying to set up an audio amplifier with quad half bridge STA515W.I've attached the schematic; is there anything I'm making wrong?Every time I solder in my custom PCB it blows up immediately. Please note that the circuit was designed for STA516B, so Vcc should be 50v, but now with STA515W is 24v.

Posted on November 01, 2014 at 21:15Hello, I'm using a STA311b DSP in my actual Project and I'm wondering how the powersupply correction works? I couldn't find any details about this feature. How do I have to connect the ADC in this case? Do you have a sample shematic for this? Thanks in advance, best regards Bernhard

Hi,We are planning to use STPM33TR in one of our switch gear product, this ADC has in built temperature compensation, and we wanted to have temperature compensation for line voltage channel should be done from external temperature sensor (far away installed from ADC), Is there any product or ADC (Similar to STPM33TR) which can sense voltage, current and external temperature do the temperature compensation and has all types of metering calculations.  RegardsPradeep

I want choose a part which has audio codec and audio amplifier in a single IC. It should support USB interface. The amplifier(chip) output is given to a speaker. It should support 3-5V supply range.Note: Speaker consume power in the range 2-4W     Speaker has impedance in the range of 3-10 Ohms     Speaker has maximum resonant frequency of 750Hz ± 20%     Speaker's operating frequency range is varying from 0 - 20KHz     Speaker has a maximum distortion < 10%

Hello!This is a manufacturer of PLC MODEM in Korea. My name is David Ko.Part number - TPL5010 (TI: Texas Instruments, http://www.ti.com/product/TPL5010) is what we are using IC.In 2018, our expected require number of ICs are 600,000. I would like to recommend Analog Devices' supply of smooth products due to supply problems.1 Features• Supply Voltage From 1.8 V to 5.5 V• Current Consumption at 2.5 V and 35 nA (Typical)• Selectable Time Intervals: 100 ms to 7200 s• Timer Accuracy: 1% (Typical)• Resistor Selectable Time Interval• Watchdog Functionality• Manual ResetThank you.

I am using the STA350BW​. While I tried to change the output gains by writing register 0x07, a noise showed up. I found that it is something relative to DRC and when the DRC is enabled, ZCE seems not work.How can I eliminate the zipper noise while tuning volume. Thanks.

I have connected a Quad ADC (ADAU1978) to I2C2 peripheral of STM32F407VGT. I ahve also enabled I2S2 peripheral to get audio data from the ADAU1978.I am using HAL API HAL_I2C_IsDeviceReady to check whether the slave is acknowledging or not. This API returns a HAL_ERROR always. However if i simply make a project with only I2C2 enables the API works fine and returns HAL_OK.