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TLV2371-EP: TLV2371-EP

November 12, 2018, 9:41 am
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Part Number:TLV2371-EP

Hello ,

We got a question regarding this OPA and all the EP components on general way , regarding the radiation reliability , on TID and SEE .

It will be very helpful for us if you can provide us a maximum operating rating for radiation environment .

Best regards .

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INA302: Evaluation Module CAD files

November 12, 2018, 12:33 pm
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Part Number:INA302

Hello,

I plan to use the INA302 in my next design.

are the CAD files used for the evaluation module available? I think it was done in Altium. That would be very helpful.

Regards,

Pere

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TS5A22362 can support bipolar signals?

November 12, 2018, 12:44 pm
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Part Number:TS5A22362

Following Kai's suggestion to make a local negative supply for TPS3501, I thought it better to check out if application circuit TS5A22362 having  bipolar signal is ok with GND referenced supply.. According to my understanding of  this chip, the switch can pass  both +ve  & -ve  signals. In our case, signal amplitude is <250mV. 

Pl see below

Any suggestion will be highly appreciated if there is anything design issue here.

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RTOS/OPA857EVM: OPA857EVM

November 12, 2018, 4:10 pm
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Part Number:OPA857EVM

Tool/software: TI-RTOS

Hi,

I am using TIDA-00725 Signal-Chain Circuit, can anybody please tell me what is value of R28 in BOM?

Thanks

Ahsan

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TINA/Spice/LMH6629: Calculated voltage gain is not as the simulated value for LMH6629

November 12, 2018, 9:30 pm
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Part Number:LMH6629

Tool/software:TINA-TI or Spice Models

Hi, 

While designing a noninverting op amp shown in following circuit, I used Rg=13 ohm, Rf=240 ohm, which will should give me a voltage gain of 1+Rf/Rf=19.5. However, from transient simulation, the voltage between input and output only present 116.03/10.69=10.85. This is not match to the calculated value. Are there any places that I did wrong here?

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INA233: Asking for the INA233 layout review

November 13, 2018, 1:47 am
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Part Number:INA233

Hi Team,
Customer uses INA233 for the current monitor.
Could you please review the layout and provide your comment.


BR,
SHH

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OPA360: Aging test output vedio abnormal

November 13, 2018, 2:02 am
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Part Number:OPA360

Dear TIer,

When we aging test,output vedio is abnormal in different time periods arise.When we touch OPA360,problems will arise.

Just like the picture as below.

We A-B-A swap to test.Problem is still exist.Passing board is still normal.

Abnomal:

Normal：

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OPA2189: Higher CMRR and PSRR

November 13, 2018, 5:19 am
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Part Number:OPA2189

Customer is looking for the OPA with higher CMRR and PSRR for dual channels.  Please help to check if there is suited OPA better than competition of MAX44246.

Competition: MAX44246 (CMRR=146dB, PSRR=146dB, Slew Rate=3.8V/uS)

OPA Bias power: Single VDD

Application: VFD drive

Customer thinks the OPA2189 is not good at CMRR.

Regards,

Brian

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XTR115: Pin3 to Pin4 Resistance value Tolerances.

November 13, 2018, 9:00 am
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Part Number:XTR115

Hi Kai , my name is Bishoy I'm a Victor's colleague .

We have changed the design of the board in order to eliminate the ground path , I would like to show you the new design and get your advice , but I can not share the schematic on the forum page because it is confidential i.e company property .

But it would be very beneficial for me to get your advice , so is it possible to email it to you and get your feedback on it ?

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OPA541: Damage at startup with an inductive load

November 13, 2018, 10:24 am
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Part Number:OPA541

Hello,

I'm using the OPA541 and at startup the sense input is dammage

I drive an inductive load (25mH 2,4ohms)

here is the schematic used :

Do you have an idea where is the problem.

Thank's for your help.

Gilbert

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THS4304-SP: Driving inputs while unpowered

November 13, 2018, 11:07 am
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Part Number:THS4304-SP

I am using the THS4304-SP in an application where it is buffering/amplifying a ~10MHz sine wave reference clock.  The ~10MHz oscillator may get powered prior to the supply for the THS4304-SP.  The oscillator is transformer isolated, then AC-coupled to the THS4304-SP, where we have a DC-bias setup at the input.  The nominal output level of the oscillator is +6dBm.

Is it OK to drive the unpowered THS4304.SP in this situation?

Thanks,

Brian

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ET Power amplifier

November 13, 2018, 2:08 pm
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hi, guys

I'm doing telecom base station ET PA design.

Want to change bias voltage of PA by signal envelope. (bias voltage is for PA input. It's low voltage and very low current. )

I remember TI has an IC to do that. 

Could you tell me the part number?

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Linux/INA226: Current measurement with large offset(250mA)

November 13, 2018, 7:10 pm
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Part Number:INA226

Tool/software: Linux

Hi Team, I used INA226 as common field current monitor(range as DC 0 - 1.5A). But the MCU get the value of current is 1020mA, But the Multi-Meter current test show 770mA. There is about 250mA offset.

Is there any incorrect design in my .sch

 

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am335X design

November 13, 2018, 10:15 pm
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have any am335X  design sample?

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LMC6482: IBIS model

November 14, 2018, 1:32 am
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Part Number:LMC6482

Dear Technical Support Team,

Do you have IBIS model for LMC6482IMX/NOPB?

Best Regards,

ttd

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LM2904: about LM2904 output short to GND

November 14, 2018, 1:33 am
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Part Number:LM2904

hi dear supporting team,

customer is using LM2904, there is one application which connect MOS  at the output, when it need protect, there will be a drive signal cause 2904 output short to GND. is it ok? tks!

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INA210: Measurement of voltage and current

November 14, 2018, 1:48 am
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Part Number:INA210

Hello,

I just began to use theINA210 using the configuration of the INA190EVM. I have a questions to confirm that everything is  set correctly.

1.I create a new combination for the INA 210 according to the schematic INA210

With he same values as in your EVM  but i need to calculate the R81 value. The voltage  for the unit is 14V the current to measure is 0.03 mA to .100mA.   we want to measure something for .100mA should be something like 4 volts with a steps of 100mV for less current. if this possible. I assume also the power up for INA210 should be 5V, is that correct.

thanks in advance

Silvia.

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TLC3704: Recommended common-mode voltage limits

November 14, 2018, 5:14 am
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Part Number:TLC3704

I'm looking for some technical rationale for the common-mode voltage limit of Vcc-1.5V.

I have a legacy design that breaks this rule, but has worked just fine. (Vcc =3.3V, Vcm = 2.5V) I recently came across this limitation in the datasheet.

I am wondering why the limitation exists (from a part design perspective) and what failure modes (if any) are expected if this is exceeded.

This limitation is not noted as an absolute max in the datasheet. Is this stressing the part in some way?

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LM239A-EP: Marking on package

November 14, 2018, 8:04 am
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Part Number:LM239A-EP

Hello,

what is the meaning of "79KG4" and "AOTV" on the frontside of the package?

what is the meaning of "M44" and F30" on the backside?

best regards

Till

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When debugging, AMC1200TDWVRQ1 found that its temperature drift is very large.

November 14, 2018, 4:25 pm
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When debugging, AMC1200TDWVRQ1 found that its temperature drift is very large, and the chip and chip consistency is also very poor; after the board is placed in the housing and placed in a high temperature box (55 ° C or -30 ° C) for 30 minutes, the chip output A large offset occurs, the threshold shifts to a large value at high temperatures, and the threshold shifts downward at low temperatures. At 55 and -30 °C, there will be a deviation of about 30V. Help me check where the parameter settings are unreasonable, or if there is a chip with small temperature drift and good linearity, thank you

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