Amplifiers forum - Recent Threads

OPA355: Gain BW

sruthi siripuram — Sat, 07 Mar 2026 11:51:48 GMT

Part Number: OPA355

OPA355 datasheet mentioned GBW = 200MHz at G=10 but as per graph in page13 Gain at 10v/v is ~ 15MHz can u explain me where i am wrong

TLV2316-Q1: Request for Whisker Test Standard Information – BMW DCDC Gen Basis Project

Deepan Govindharaj Shanmugam — Sat, 07 Mar 2026 09:24:50 GMT

Part Number: TLV2316-Q1

Dear Supplier,

Good day!

We are in the process of collecting information regarding the BMW DCDC Gen Basis Project

Kindly provide the details requested below, specifically the standard used for whisker testing and confirmation on whisker evaluation according to JESD201.

Please fill in the missing information in the table:

Manufacturer	Manufacturer Part Number	Flex Part Number	Item Description	Standard used for whisker test? [DIN EN 60068-2-82 or JESD22-A121A]	Evaluation of whiskers according to JESD201 [Yes/No]
TI	TLV2316QDGKRQ1	FLX-BMW-ICS100267-00	IC 10MHz Rail-to-Rail Input/Ou

INA233: Supply voltage wrt I2C high voltage

Adi R — Fri, 06 Mar 2026 13:18:25 GMT

Part Number: INA233

Hi,

I could not make it from the datasheet. Is it allowed to supply the INA233 with 3.3V while using 5V for the high voltage on the I2C bus?

THS3491: Gain setting

ttd — Fri, 06 Mar 2026 12:18:13 GMT

Part Number: THS3491

Dear Technical Support Team,

How do I extimate the gain such as G=8 for d Noninverting amp?

THS3491 is current feedback, so resistor value is important.

I use RF=576ohm and RG=82ohm for G=8. Is it correct?

How about G=6 and G=7, G=9 for example?

This is my TINA TI simulation.

THS3491_Non_invert_G=8_250M_Sine.TSC

Best Regards,

ttd

TRF1208: TRF1208 residual phase noise

Ali Aydın — Fri, 06 Mar 2026 11:51:40 GMT

Part Number: TRF1208
Other Parts Discussed in Thread: TRF1108,

Hi,

I've been looking for DtS amplifiers and I've seen TRF1108 spcifiying its residiual phase noise but couldnt reach any data about TRF1208. 1108's BW is not enough for me, can you help me about this issue?

Thanks

LMV324-N-Q1: Voltage difference from IN A+ and IN A-

Hanbing Xiao — Fri, 06 Mar 2026 11:04:05 GMT

Part Number: LMV324-N-Q1

Hi team,

Customer replied that they found the voltage of IN+ and IN- are not same when the circuit is running. 30 units failed out of 700 units. The problem can be solved after ABA test.

Since the failure rate is pretty high, so i think it might not be a quality issue.

Can you please check if there any problems with customer design?

Hanbing

XTR106: XTR106 Circuit Inquiry

JAE OK KIM — Fri, 06 Mar 2026 08:35:04 GMT

Part Number: XTR106

I have implemented a circuit that converts a 1kohm loadcell output to 4~20mA, as shown in the image.
I'm only connection the load cell power to pin13, not pin 14

Currenly, the circuit output remains unchanged at 4~20mA.
What could ge the problem?

TAS2563: Schematics Verification

Siddarth hudedamani — Fri, 06 Mar 2026 08:04:51 GMT

Part Number: TAS2563

Could you please advise on the following:

Whether the schematic implementation for the TAS2563 BGA package is correct.
Is using a voltage divider to generate the 1.8 V supply acceptable for this IC, or could it cause stability/noise issues?
If the voltage divider is not recommended, what would be the preferred method to generate the 1.8 V rail?

AMC0311R-Q1: Max Analog input limit

ABKD — Fri, 06 Mar 2026 07:07:49 GMT

Part Number: AMC0311R-Q1
Other Parts Discussed in Thread: AMC0311R

Hello,

For AMC0311R-Q1 the recommeded conditions are given as -

But the absolute max ratings are as below -

So as per above absolute limit of upto 7V, can I apply 4.81V to the input for below application -

Here, Vin = 5V; the NTC max voltage goes to 4.81V and R1 = 68 kohm and min. 170mV

Can I directly inteface AMC0311R-Q1 to above circuit ?

INA229: nA level current variation detection

Roy Chou1 — Fri, 06 Mar 2026 05:54:20 GMT

Part Number: INA229
Other Parts Discussed in Thread: INA228

Hi Team,

I want to confirm if INA229 is appropriate solution for nA current detection?

Do we have I2C interface corresponding solution?

Regards,
Roy

OPAMP-NOISECALC: IBIS MODEL

Debasmita Deoghuria — Fri, 06 Mar 2026 04:59:49 GMT

Part Number: OPAMP-NOISECALC
Other Parts Discussed in Thread: OPA388

I need the IBIS MODEL OF OPA388 for my research purpose.

OPA2695: Behavior of Output When Power is OFF

kenji sakuma — Fri, 06 Mar 2026 04:38:51 GMT

Part Number: OPA2695

When the power is turned off while the DIS terminal is at a low (negative) level,
the output becomes energized. The device is operated with a ±5 V power supply.
1. Is this behavior acceptable and intended according to your specifications?
2. If not, could you please advise on recommended countermeasures?
Specifically, I would like to avoid any output being energized when the power is off.
Could you please let me know if any of the following measures are appropriate or recommended for this device?
• Adding a pull-up or pull-down resistor on the DIS terminal
• Adding a series resistor or protection components on the output
• Changing the default logic level or connection method of the DIS terminal
If there are any reference circuits or application notes that address this situation,
I would appreciate it if you could share them.

TLV3401: TLV3401IDBVR COD place

sam xu — Fri, 06 Mar 2026 01:25:27 GMT

Part Number: TLV3401

Pls show us the TLV3401IDBVR COD place, our customer need it, thanks a lot!

RES60A-Q1: Clarify detail each condition on absolute max parameter

Ryuuichi machida — Thu, 05 Mar 2026 23:08:54 GMT

Part Number: RES60A-Q1

Hi,
My customer is interested in RES60A.
However, there are seveal values you defined in datasheet.
I think that each described in "Recommended operating conditions" as shown below means specification which user can apply as "DC voltage" and "AC voltage".

However, I'm not sure meaning of description in "absolute maximum rating" as shown below.
Does three contents of row mean criteria of something standard specification (like IEC xxxx etc) ?
- "Maximum short-term overoad"
- "Transient high-potential voltage ac"
- "Transient high-potential voltage dc"

The point which I would like to confirm is how(what kind of method should use use) customer can confirm whether customer does not violate absolute max spec.

Best Regards,

TLE2144M: Pinout for LCCC FK (20) Package?

Matthew Johnson — Thu, 05 Mar 2026 22:46:22 GMT

Part Number: TLE2144M

Datasheet has skewing on pg 3 for pinout. Is 17 NC, 16 VCC-, 3 1IN-, 2 1OUT, 1 NC, 20 4OUT, 19 4IN-?

LM101AJAN: LM101AJAN vs M38510/1010 Pin Out

Mike Woodard — Thu, 05 Mar 2026 20:33:34 GMT

Part Number: LM101AJAN

I am looking for a replacement for an M38510/10101BGA opamp, both the LM101A and the LM101AJAN have been suggested as replacements. According to MIL-M-38510/101K pin-8 is floating (NC) on the TO-99 case. However, when reviewing the schematics for both the LM101A and the LM101AJAN it looks like pin-8 is connected to the collector of Q7, this would make them M38510/10103BGA opamps not M38510/10101BGA opamps, right? Can you confirm, if, for the TO-99 case, pin-8 is floating on the LM101A and/or LM101AJAN.?

LMH6654: Need space qualified equivalent component

cody campana — Thu, 05 Mar 2026 20:16:03 GMT

Part Number: LMH6654
Other Parts Discussed in Thread: LMH6628QML-SP, LM6172QML-SP, LM7171QML-SP

Need an equivalent opamp for space as the LT6200 from ADI or LMH6654 which should be pin to pin compatible.

LM2903B-Q1: Die failure mode

Scarlett Cao — Thu, 05 Mar 2026 14:37:07 GMT

Part Number: LM2903B-Q1

Hi team

Could you please help share what does OUT functional not in speccificaiton means?

what type of failure mode it covers? Does this include output oscillations?

Thanks

Scarlett

INA310B: Datasheet Error

Francis Jiang — Thu, 05 Mar 2026 13:35:37 GMT

Part Number: INA310B

Hi Team,

Whether there is a error of figure 6-37? The Figure 6-40 and below table both show the tp is about 1us under 20mV OD condition, not 75ns.

Thanks.

BRs,

Francis

LM1875: NEB package drawing confirmation needed

Suresh G — Thu, 05 Mar 2026 13:24:40 GMT

Part Number: LM1875

Hello Team,

The Part LM1875T/LB02 got Obsoleted, and the recommended replacement was LM1875T/LF02 (just Pb-free difference). When cross checking the dimensions, I could see there are two versions of NEB package (Version A & B). May I know which rev does the Obsoleted and Alternate part follows?

Regards,

Suresh G

THS4552RTWEVM: Simulating THS4552

Uday Kumar Urimi — Thu, 05 Mar 2026 12:57:04 GMT

Part Number: THS4552RTWEVM
Other Parts Discussed in Thread: TINA-TI

Dear TI,

I would like to understand the below circuit and below are my queries

Technical :

Let us consider Vin as pulse of 0-3V 50MHz, VCM as 0.9V
What will be the gain of this circuit?
What will be the output voltage level for Bias of 0V and Bias of 2V
What are the output levels of differential outputs?
How the differnet VDD supply(4.3V in the circuit) affects the output voltage swing?

Simulation :

How to simulate this circuit, if I want to experiment with different combinations?
I got permission to download PSPICE . The link is directing to a online installer. I am looking for full software for a PC that will be offline

Thank you,
Uday

TLV1701: TLV1701 vs LM139

M. Bulent KAYA — Thu, 05 Mar 2026 11:25:46 GMT

Part Number: TLV1701
Other Parts Discussed in Thread: LM139,

Hi,

In my design, I used a TLV1701 instead of the LM139 from the previous circuit. Although the rest of the circuit is the same, my signal outputs are not the same. What could be the reason for this? I can send the drawings.

INA849: Regarding the unused Pins

Maharajan P — Thu, 05 Mar 2026 10:32:23 GMT

Part Number: INA849

Dear Team,

I am Planning to use this INA849DGKR part in my design,

Please find the attached Snap shot

I want G=1, so as per te given table i left it as Not connected,

Please adivise me how to terminate VS- and IN- pins, also advise me how to use REF pin and why REF is needed. Can i terminate it to GND of 2.5V should be given as mentioned in datasheet?.

Looking forward to your reply,

Thank you and best regards,
Maharajan P

OPA858DSGEVM: Mouser Tech Request - 504429

Thomas Rosendahl — Thu, 05 Mar 2026 10:29:01 GMT

Part Number: OPA858DSGEVM

Hi,

We have a customer who ordered evaluation board OPA858DSGEVM from Mouser.

They have reported the following issues:

"The appearance of the device is complete and defect free, but the gain

should be 7 times. Currently, the laboratory has measured that it is only

1 time. We use a waveform generator to give IN+a 20mV, 1MHz sine wave. The

input and output (IN+and OUT) waveforms are exactly the same, with no

change in amplitude, indicating that the gain is only 1."

Could you please advise if there is a way they can test or trouble-shoot this board?

Kind regards

Thomas Rosendahl

Mouser Electronics

S/O 504429

OPA355: gain bandwidth product (OPA355)

vemireddi Nagamani — Thu, 05 Mar 2026 10:04:35 GMT

Part Number: OPA355
Other Parts Discussed in Thread: OPA827, OPA847

Hello Team,

In the OPA355 datasheet, multiple bandwidth-related parameters are specified, which is causing some confusion in deciding which parameter should be used for a given application.

For OPA355, the datasheet mentions:

Unity-gain bandwidth ≈ 450 MHz
Gain-bandwidth product ≈ 200 MHz at gain = 10
Small-signal −3 dB bandwidth values specified at different closed-loop gains

Since these values are not identical, it is unclear which gain bandwidth product specification should be considered during design.

My questions are:

For a specific closed-loop gain, should the small-signal bandwidth specified at that gain be preferred over unity-gain bandwidth or GBW-based estimation?
In what type of applications should each parameter be used?
- Unity-gain bandwidth
- Gain-bandwidth product specified at a particular gain
- Small-signal bandwidth at a given gain