Amplifiers forum - Recent Threads

AMC0330R: [Inquiry] Status of VDE/UL Reinforced Isolation Certification for AMC0330R (DWV)

HYEJEONG KIM — Fri, 11 Sep 2026 01:59:22 GMT

Part Number: AMC0330R
Other Parts Discussed in Thread: AMC0230R

Dear TI Support Team,

We are evaluating the AMC0330R (DWV package, reinforced isolation) isolated amplifier
for a voltage-sensing front end. Our end product targets compliance with IEC 60255-27
and KEMC 1120, so we need to confirm the current safety certification status of this
component before finalizing our design.

In the datasheet we have on file (SBASAS2, revised July 2025), the "Safety-Related
Certifications (Reinforced Isolation)" section lists both the VDE certificate number
and the UL1577 File Number as "Pending."

Could you please confirm the following?

1. Whether VDE (DIN EN IEC 60747-17 / VDE 0884-17) and UL1577 certification for the
AMC0330R (DWV, reinforced isolation) has been completed, and if so, the certificate
number and UL File Number.
2. If certification is still in progress, the expected completion timeframe.
3. Whether an updated datasheet revision reflecting the completed certification is
available.
4. As we are also evaluating the basic-isolation variant AMC0230R in parallel, please
share its certification status as well.

The certification status directly affects our component qualification timeline, so a
prompt response would be greatly appreciated.

Best regards,
Hyejeong Kim
LS ELECTRIC
Email: hyejeong.kim@ls-electric.com

LM393: LM393 with negative feedback

MIKE TITTA — Thu, 10 Sep 2026 19:39:37 GMT

Part Number: LM393
Other Parts Discussed in Thread: LM339

A pcb was designed for us where an lm393 comparator uses negative feedback res 5.1k neg in to output of the 393--The 393 positive in of the comparator is connected directly to 12 V pull up res.(10K) --The 393 pos input is connected to a hall type encoder and its output is connected to the in port of a MCU----I have been in electronics for over 60 years I have never seen a comparator use neg feed back---The comparator oscillates with an input voltage between the ref voltage =3V and the modified ref voltage due to the neg feed back of 1.7V---The voltage divider to set up for a 3V ref (the divider is a 15K and a 5.1K connected to 12V providing a 3V ref)---When the comparator goes low it puts the feedback resistor in parallel with the existing 5.1K divider providing a new ref V of 1.77V so the comparator oscillates between the 3V ref and the1.77ref when the input voltage is between those levels. My question is there ever an application to design a comparator with negative feedback. I will send you a cut and paste of the schematic if needed----Thanks Mike T

OPA333-Q1: Phase Margin Gain Margin

Nishant Gupta — Thu, 10 Sep 2026 18:47:03 GMT

Part Number: OPA333-Q1
Other Parts Discussed in Thread: TINA-TI, INA333-Q1

Subject: Help Required: Phase Margin and Gain Margin Analysis of Op-Amp Current Source

Hello TI Team,

I am evaluating an op-amp-based voltage-to-current source for my system and would like to verify its stability.

Could you please help me with:

How to measure phase margin and gain margin in TINA-TI, including the correct loop-gain simulation setup and interpretation of the Bode plot.
How to perform the corresponding hardware stability measurement without a Frequency Response Analyzer/Bode plot analyzer. I would like to know a practical method using equipment such as an oscilloscope/function generator.
Please suggest easy-to-understand TI literature/application notes for this analysis.
If possible, could you please provide or modify a TINA-TI simulation file for my exact current-source circuit so I can understand the complete procedure?

My circuit is a voltage-to-current source for a constant-current application. The current-source schematic is attached.

Ron Michallick , you previously helped me with a similar simulation in my earlier E2E post. Ron, could you please help me complete the stability analysis for this updated circuit in this new thread? circuit is same

Thank you for your support.

TMUX6212: MAX3657 die replacement

Paul Sharman — Thu, 10 Sep 2026 17:15:11 GMT

Part Number: TMUX6212

I'm looking to replace the MAX3657 (Die only - Not packaged)

Do you know if the TMUX6212 is the replacement and does this come as Die only??

OPA380: Proper gain from TIA

john Fioriglio — Thu, 10 Sep 2026 16:16:34 GMT

Part Number: OPA380

I need to have a TIA that can convert current for an optical detector in the range of 0.55 uA to 55 uA.

We spiced the OPA380 in our circuit and we could not get a significant voltage change with the 0.55 uA input. What part would you recommend?

INA114: Temp is not stable with the new

Marvn Arcangel — Thu, 10 Sep 2026 15:39:20 GMT

Part Number: INA114

Hi Experts,

There is an issue with an old batch IC which was received on Oct-2025 this is working fine and New Batch IC that is not working properly all setup are same for old and new batch IC.

We will provide the comparion video and other references.

Would you kindly confirm what is the issue?

Thanks and regards,

Marvin

TLV9042: Op-Amp producing 1V Oscillation between 20-40kHz

Stephen Kirchner — Thu, 10 Sep 2026 15:18:21 GMT

Part Number: TLV9042
Other Parts Discussed in Thread: TLV9052

At coil50 we are getting the expected results. At TP1/CoilBuf I am seeing a ringing on the line up to 1V and causing the output on TP4 to switch with it. Incomming pulses can be as small as 1mV, so to have the ringing at 1v overrides that signal. Is there a way to clear out the ringing?

INA237: INA237 SCH confirmation

Vayne Li — Thu, 10 Sep 2026 12:02:20 GMT

Part Number: INA237

Hi Teams.

The customer is using INA237 for robot applications for current detection. Below is SCH. Could you please help confirm if there are any issues? Thank you!

TLV9102: Is it okay to use OAMP instead of Comaparator for push pull output

Souradeep Pal — Thu, 10 Sep 2026 10:11:53 GMT

Part Number: TLV9102
Other Parts Discussed in Thread: TLV9032, , TLV9022

U13 (TLV9102) is a rail-rail OPAMP. Do we need to use comparator? TLV9022/TLV9032.

IO_SENSE is compared with a Fixed value, to output logic signal.

AUDIO-AM62D-EVM-CPLD-PROGRAMMING-TOOL: SDK/environment used by TI and DSPC for MBOS Amplifier

Abdelazim Elkadi — Thu, 10 Sep 2026 07:40:40 GMT

Part Number: AUDIO-AM62D-EVM-CPLD-PROGRAMMING-TOOL

please share urgently the latest SDK/environment used by TI and DSPConcepts for the EVAL Board bring up activities, including the relevant latest configuration, patches and packages that are as close as possible to the Mercedes-Benz Amplifier

This is required to ensure that Bose can reproduce the same environment and avoid compatibility differences between the Bose EVAL setup and the environment used by TI/DSPC with the Mercedes-Benz Amplifier.

INA114: Temp Fluctuation in INA114AP In Recent Batch

Nikhil Mishra — Thu, 10 Sep 2026 04:57:08 GMT

Part Number: INA114

I had purchase the 1000 Qty of INA114AP from TI Store, In this New Batch IC is not working Properly with my machine, We are Regular buyer and Regular user of this IC and i think i had purchase almost 5000 IC from TI Store, Every time this is working properly but this time we have issue with new Lot IC.

So i want Replacement on Top Most Priority Basis, Beacuse my Production is stuck due to this Major issue.

If you Required any Document and Evidance from my side i will let give it to you. Just let me know what you Required.

I am attaching the some comparision Video of Prvious batch IC performance vs New Batch IC performance, Setup are same.

In New Batch Temp are flucuating continious with the diff of 0.8'C this is not accepted to us, we are accepting the Max 0.2'c or Stable.

I am Attaching the COC copy of this IC so you have the idea about when i had purchase.

I want Replacement so do Expedite the Process and Proceed it for replacement.

000050.pdf

TPS389006: MSL requirement

June Ding — Thu, 10 Sep 2026 02:58:04 GMT

Part Number: TPS389006

We can't find any information on TI’s website of parts as below,please help to check are these parts on the status of non-production or end-of-life ,tks!

PPS38900801RRTERQ

PPS38900805RRTERQ

PPS38900804RRTERQ

PPS38900802RRTERQ

PPS38900803RRTERQ

TPS38900802RRTERQ

TPS38900803RRTERQ

TPS38900805RRTERQ

TPS38900801RRTERQ

TPS38900804RRTERQ

TPS389008RV2RTERQ

TPS389008RV1RTERQ

TPS389008RV4RTERQ

TPS389008RV5RTERQ

TPS389008RV3RTERQ

PPS389008RV4RTERQ

PPS389008RV2RTERQ

PPS389008RV1RTERQ

PPS389008RV5RTERQ

PPS389008RV3RTERQ

TPS6594C3A3RWERQ1

PTPS6594C3A3RWERQ1

PLM5148QRGYRQ1

LM5148QPSQRGYRQ1

P5137QRHARQ1

PLM63625DDQDRRRQ1

PLM63635DDQDRRRQ1

LMP8640QMKE

LM324-N: Technical question about the Texas Instruments LM324N

KANTA TAKEUCHI — Thu, 10 Sep 2026 00:12:35 GMT

Part Number: LM324-N
Other Parts Discussed in Thread: LM324, TLV4888, OPA2994

In the attached very simple amplifier circuit with a lamp, about 30% of the units have an output of >100mV when the input is 0V.

The remaining 70% may have a negative-side offset, but this has not been measured.

When several hundred units were examined, the maximum output was 730mV at an input of 0V when power was turned on.

In addition, this output voltage has a positive temperature characteristic, and tends to increase over time as well as when the ambient temperature is raised.

Therefore, first of all, can this phenomenon be explained as variation within the manufacturer's allowable range? If so,

we would appreciate it if you could advise us on the mechanism and corrective measures.

If not, and this is considered an abnormal value, we would like to know the possible causes.

For example, is it possible for such a phenomenon to occur due to aging deterioration (moisture absorption, etc.)? Would baking be an effective countermeasure?

LM324N.pdf

We have secured several samples, so if possible, it would be extremely helpful if you could measure the offset of each of the four internal circuits and investigate the cause or elucidate the mechanism,

and we would greatly appreciate your kind consideration.

TLV1821-Q1: Functional safety documentation

Nicholas Carley — Thu, 10 Sep 2026 00:08:52 GMT

Part Number: TLV1821-Q1

Do we have Functional Safety Information for TLV1821QDCKRQ1? I have found it for the family, but this information is for the SOIC-8 package, not the SC-70 package.

OPA593: OPA593 - SBOA602 Application Note BJT feedback capacitor selection

Jin Rhim — Wed, 09 Sep 2026 16:50:41 GMT

Part Number: OPA593
Other Parts Discussed in Thread: OPA598,

Thanks for reading this.

I am currently developing an OP-AMP driver for driving 150nF capacitative load with sawtooth.

I originally followed the SBOA602 TI application note by Raymond Zhang for driving an capacitative load with current booster setup.

Input is the -3.3V ~ 3.3V sawtooth and the output is the amplified -30V to 30V Sawtooth.

The setup worked well until sawtooth frequency of 1khz.

At 5khz input sawtooth frequency, BJTs burned.
With thermal camera, the temperature of darlington bjts were above 160℃ within 10 seconds of running the input sawtooth signal.

My goal is to run the 150nf capacitative load with 1khz ~ 15khz sawtooth signal with highest slew rate possible during the falling edge.

Below is my modified circuit for thermal dissipitation.

Is it possible to get a feedback on what size capacitor I need to choose for C2?

Also, for the BJT selection I would prefer to have smaller TO-252 package (instead of big TO-3P Package) but I think it will not withstand ~ 100W heat during the falling edge of the sawtooth. Any suggestions on how to effectively make circuit smaller size?

I've attached the schematic.
Job1.PDF

LM311: Safety rating

Ralph Burke — Wed, 09 Sep 2026 16:35:55 GMT

Part Number: LM311

Hi,

For the lm311p voltage comparator, do you have Functional Safety, or Documentation to aid in functional safety design?

We would need to know failure rate and/or mean time before failure (MTBF) for this device.

If this information is not availbale for the lm311p, is there an equivalent voltage comparator with the same pin-out configuration, and which has functional safety data as described above?

I look forward to hearing from you.

Thanks and best regards,

Ralph Burke

TURNKEY SOLUTIONS WITH VISION

Robots
Bespoke Automated Machines
Automated Test and Measurement Systems
Vision Systems
SCADA Systems

LM6142: PSRR in datasheet

Toshiaki Morita — Wed, 09 Sep 2026 11:46:40 GMT

Part Number: LM6142
Other Parts Discussed in Thread: LM6144, LM61

Hi team,

We've received a question from the customer about the datasheet of LM6142.

Is this just a typo and is this PSRR specification is for LM6142 and LM6144 ? (Not for LM6132, right ?)

Regards,
Toshiaki Morita

LMP8480: LMP8480MME-S/NOPB Is in obselete stage. alternate

Sathya N — Wed, 09 Sep 2026 10:18:35 GMT

Part Number: LMP8480

Hi Team,

LMP8480MME-S/NOPB is in obselete part.

Can you confirm the alternate choosen is pin to pin and feature compatible with LMP8480MMX-S/NOPB

Regards,

Sathya Priya N

INA226: Can I let VBUS floating?

Yuxi Liu(Tony) — Wed, 09 Sep 2026 09:51:31 GMT

Part Number: INA226

Hi TIer

My customer use INA226 in medical system detect the current.

And we don't need the voltage monitor.

So we unuse VBUS pin right?

Could I let the VBUS pin floating ? or connect GND? Which one is correct ?

Thank you very much.

TLV9064: Pin abnormal

Arnon Sripheuk — Wed, 09 Sep 2026 09:18:07 GMT

Part Number: TLV9064

During the production process, an abnormality was found on the IC lead. The lead appeared to have a notch or cut extending into the lead material.

TRF1305A1: We need spice model of TRF1305x1

xiao weihua — Wed, 09 Sep 2026 09:10:23 GMT

Part Number: TRF1305A1
Other Parts Discussed in Thread: DAC39RF10, , TRF1305

hello, Team!

we plane to design a differential to single-end circuit for dac39rf10 with trf1305a1, we need dc couple output, so we must supply the correct bias votage for both dac and FDA, could you please help me with the spice model of TRF1305x1? thank you very much!

best regards!

xiaoweihua

INA241B: differences between INA241B4IDDFR and INA241B4QDDFRQ1

Yoni Zlotnick — Wed, 09 Sep 2026 07:51:58 GMT

Part Number: INA241B

what is the differences between INA241B4IDDFR and INA241B4QDDFRQ1 ?

CSD95410RRB: ESD Sensitivity Data Request (HBM, CDM, MM) for TEXAS INSTRUMENTS INC components

Luis Guillermo Pena — Tue, 08 Sep 2026 23:42:43 GMT

Part Number: CSD95410RRB

Hello sales team,

I hope this email finds you well.

As part of Celestica’s strict compliance with the ANSI/ESD S20.20 standard for our ESD control program, we are currently updating our component database.

To ensure our ESD Protected Areas (EPA) and manufacturing processes maintain the appropriate controls to prevent electrostatic damage, we require the ESD withstand voltage levels for the components we currently procure from you.

Could you please provide the test results or qualification reports for the following ESD model for the part number?

HBM (Human Body Model)
CDM (Charged Device Model)
MM (Machine Model)

Thank you in advance for supporting this request.

TAS2563: Access to PurePath

JONATHAN THOMPSON — Tue, 08 Sep 2026 23:07:04 GMT

Part Number: TAS2563

Hello,

We have integrated the TAS2563 into our project, however it is only working in Bypass mode. The documentation is referring us to utilize PurePath to fine tune. However, access was denied. Can someone provide guidance on next steps?

LMH6881: LMH6881 DC-Coupled Input Configuration

Abishek Devan — Tue, 08 Sep 2026 14:37:24 GMT

Part Number: LMH6881
Other Parts Discussed in Thread: LMH6882

Hi Team,

We are currently working on a new ADC front-end project, and I have selected the LMH6881 as the variable-gain amplifier (VGA).

I would like to understand how to configure the LMH6881 input for a DC-coupled application with the following input specifications:

Input voltage: −1.5 V to +1.5 V
Input type: Single-ended
Source impedance: 50 ohm
Coupling: DC-coupled
Bandwidth: 250 MHz

While reviewing the LMH6881 datasheet, I came across Figure 45 – DC-Coupled ADC Driver Example 1, High-Input-Impedance ADC.

Could you please provide guidance on how to configure the input stage to:

Attenuate the −1.5 V to +1.5 V input signal to approximately 1 Vpp, as required by the LMH6881.
Shift the input common-mode voltage to approximately 2.5 V to match the LMH6881 input requirement.
Maintain the required 50 ohm single-ended input impedance while implementing the above attenuation and DC offset.

A recommended passive resistor values for this configuration would be very helpful.

Thanks in advance for your support.

Regards,
Abishek