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WE ARE USING OPT101 PHOTO-DIODE ,IN OUR APPLICATION THE VOLTAGE OUTPUT AT OPT101 IS 1mV, WE WANT TO AMPLIFY THIS SIGNAL WITH VERY LOW NOISE. CAN ANYONE SUGGEST ME THE OPAMP SUITABLE FOR THIS? THE OPERATING REAUENCY IS 10KHz.

April 8, 2019, 11:38 pm
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THE PROBLEM WE ARE FACING IS THAT OUR SIGNAL IS OF 1mV BUT THE NOISE OUTPUT AT THE OPT101 END IS AROUND 22mV. BECAUSE OF THIS WE ARE UNABLE TO DETECT THE SIGNAL. CAN ANYONE SUGGEST THE OPAMP FOR THE SAME AS WELL AS HOW TO REDUCE THE NOISE FROM THE SIGNAL.? 

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RTOS/INA223: INA223 Equation2 and Power Modes description

April 8, 2019, 11:40 pm
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Part Number:INA223

Tool/software: TI-RTOS

Hi Sir

I have a question about INA223 Equation2(page16) is correct or not as below.

Because I saw Power Modes description (page17) are conflict with Equation2

Maybe correct equation2 is POWERgain=VOUT/(POWER)(R SHUNT), Is it right?

Thanks for your great support.

 

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LMC7221: HBM/CDM/MM Data of LMC7221AIM5X/NOPB

April 9, 2019, 1:28 am
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Part Number:LMC7221

Hello,

Customer Gemtek Technology Co., Ltd. requests for HBM/CDM/MM Data.

I can't find data from Datasheet, could anyone help to reply? 

Thank you.

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PGA5807A: LNA solution

April 9, 2019, 1:44 am
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Part Number:PGA5807A

Dear E2E,

Do we have LNA solution which spec is shown in below?

Operating Frequency 734 ~ 960MHz

Gain 13 dB

NF 1.1 dB

Supply voltage 1.5~3.3V     2.8V (typ.)

BR,

Jason

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INA3221: register map for "current" monitor

April 9, 2019, 5:07 am
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Part Number:INA3221

Hi Team,

can you advice how to do "current" monitor function with INA3221?

what's the calculation?

where is the register map?

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LM358B: lm358 LM358B

April 9, 2019, 6:28 am
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test - will delete

April 9, 2019, 9:48 am
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I HAVE A SIGNAL OF 100uS PULSE-WIDTH, WITH 4-PULSES/SECOND, IN THIS IF I WANT TO APPLY A LOW PASS FILTER TO REMOVE NOISE WHAT SHOULD BE THE CUT OFF SO AS TO RETAIN MY SIGNAL SHAPE AND REMOVE THE NOISE.

April 9, 2019, 11:49 am
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I HAVE A SIGNAL OF 100uS PULSE-WIDTH, WITH 4-PULSES/SECOND, IN THIS IF I WANT TO APPLY A LOW PASS FILTER TO REMOVE NOISE WHAT SHOULD BE THE CUT OFF  SO AS TO RETAIN MY SIGNAL SHAPE AND REMOVE THE NOISE.

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LM393: LM393 output sink current

April 9, 2019, 5:54 pm
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Part Number:LM393

Hello Sirs,

We have a sink current not enough issue for LM393 output low .

There's proportion that LM393 can't sink current up to 10mA .Will cause output voltage not low enough .

Below is test circuit . Would you pls give advice if this test method ok or not ?

BTW. Current limit setting is by power supply .

Many thanks !

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BOOSTXL-TLV8544PIR: Can this PIR sensor used by LaunchPad CC2640R2 Board? How can I learn to use it?

April 9, 2019, 7:24 pm
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Part Number:BOOSTXL-TLV8544PIR

Hi,

I want to use the BOOSTXL-TLV8544PIR sensor with LaunchPad CC2640R2 Board to detect motion in a building corridors and transform motion sensor situation through Bluetooth. I follows the "BOOSTXL-TLV8544PIR User's Guide", which is download from TI website (www.ti.com/.../BOOSTXL-TLV8544PIR). However, the user's guide indicates that the sensor with CC2650 LaunchPad board, but I have only CC2640R2.

Following the user's guide, I download "Flash Programmer 2", "BOOSTXL-TLV8544PIR FIRMWARE" and "BOOSTXL-TLV8544PIR GUI". I download the "BOOSTXL-TLV8544PIR FIRMWARE" to the sensor by using SmartRF Flash Programmer 2. I also try to install the "LaunchPad windows driver installation". However, the GUI does not work. It always shows me the "Auto COM port detection has failed ......". I try the user's guide suggestion. It doesn't work. I also find the motion sensor green led is not on, which means the LaunchPad board is not ready (This is the user's guide's explain.). When I try to move my hands in front of the sensor, the red led does not on, either the yellow led. I think the sensor does not work. I check the hardware setup. I connect the sensor on the LaunchPad CC2640R2. Then, I connect LaunchPad CC2640R2 to PC using the USB cable. The two jumper blocks are all installed on the sensor board. I can not find any mistake of hardware setup. I have no idea how to use the sensor without CC2650 LaunchPad board.

My question is that. Is this BOOSTXL-TLV8544PIR only works with LaunchPad CC2650? Or, it can be used in other board. For an example, I have LaunchPad CC2640R2. I think the sensor should work in other LanchPad board. Where can I find the software introduction of how to use the sensor with LaunchPad CC2640R2? I am a stranger of TI development board. Can anybody give some suggestion, where can I start to learn the sensor  operation? Can I learn the GPIO interrupt or TI-diver of the LaunchPad CC2640R2 and then try to control the BOOSTXL-TLV8544PIR sensor?

By the way, should I make sure the sensor works? For example, the green led on the sensor board should be on. How can I make the sensor works on LaunchPad CC2640R2? Does the LaunchPad CC2640R2 need a program code? where can I find it?

Regards, Robert Yang

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OPA192: the output voltage of OPA192 has spikes

April 9, 2019, 9:07 pm
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Part Number:OPA192

The amplifier part number is OPA192IDBVR and the schematic is as below. When the load current value changes from 3A to 81.72A, changing frequency is 1kHz and slope of it 2.5A/us, the output voltage of OPA192 was shown as below figure. Could you please explain why the output voltage has such spikes(red circles)?

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INA2128： Regarding current consumption

April 9, 2019, 10:30 pm
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Part Number:INA2128

Hi,

We would like to ask you about the current consumption of INA2128.

What is the maximum current consumption when operating at a supply voltage of ± 6 V with a gain of 1.4 times,

an input voltage of ± 2.5 V?

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INA2128： Regarding current consumption

April 9, 2019, 10:45 pm
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Part Number:INA2128

We would like to ask you about the current consumption of INA2128.

What is the maximum current consumption when operating at a supply voltage of ± 6 V with a gain of 1.4 times and an input voltage of ± 2.5 V?

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TIA

April 10, 2019, 12:32 am
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Hello everyone, can I convert the weak current signal into a voltage signal and amplify this signal? Which chip should I use?

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LMV358-N: LMV358MX/NOPB

April 10, 2019, 12:43 am
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Part Number:LMV358-N

Hello!

could you let me know LMV358-N get UL certification?

I checked the datasheet but there's no statement about this.  

If it has, please let know UL/CSA file number & UL/CSA category number of LMV358-N. 

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OPA2376：Can TI replace OPA2376 chip？

April 10, 2019, 1:35 am
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Part Number:OPA2376

Hi

Can TI replace OPA2376 chip，

And how to learn ADI systematically ？

Can you help me?

Thank you

Foxox

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TLV314-Q1: behavior at short of adjacent pin

April 10, 2019, 1:59 am
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Part Number:TLV314-Q1

Hi team,

As one of reliability information, it seems the customer would like to know what the behavior of TLV314-Q1 is when adjacent pin is shorted. Do you have any documents, materials or blogs that shows the behavior at short of adjacent pin for this devices?

Regards,

Jun

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LM321: slewrate is sufficient for driving 20v/usec

April 10, 2019, 2:11 am
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Part Number:LM321

hi sir/madam,

                         I am using LM321 for amplifying my input which is at 20v/usec . but lm321 slewrate is .4v/usec.Is there any device which supports 20v/usec input?

regards

M LOKESWARA REDDY

BEL

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OPA170: Using OpAmp as attenuator: less than unity gain done wrong?

April 10, 2019, 2:13 am
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Part Number:OPA170

Hello all,

my question is closely related to https://e2e.ti.com/support/amplifiers/f/14/t/177561

The issue there was to use an operational amplifier as attenuator (e.g., to convert an input voltage from 0..10 V to 0..2.5 V). As solution, a voltage divider to bring down the input voltage followed by a (unity-gain) buffer was suggested. This seems in line with what the book "Op Amps for Everyone" (by Carter, Mancini) suggests. The book explicitly warns not to use an inverting opamp as attenuator:

However, I've seen this configuration (0 < |G| < 1) suggested several times (e.g., on electronics stackexchange here). Additionally, I've read discussions where people contest Mancini's statement. They are saying that a non-inverting gain of 1 is the worst-case for op amp feedback stability, which is equivalent to an inverting gain of zero. They conclude that if the OpAmp is specified to be stable at unity-gain buffer configuration, it should be stable at less than unity gain in an inverting configuration, too.

Coming back to the original issue, what's wrong with this solution to the question (except that the output is "inverted"), using an inverting OpAmp as attenuator: 

This is the link to the simulation.

Thanks!

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LMC6062: MAX478CSA/LT2178CS8 equivalent.

April 10, 2019, 2:33 am
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Part Number:LMC6062

Hi Team,

My customer is doing project(upgrade) on medical device and looking for P2P equivalent against MAX478CSA/LT2178CS8.

We have done below comparison (attached) with multiple device and found LMC6062 matches most of the spec.

Can you please suggest any device better than LMC6062.

(Please visit the site to view this file)

Regards, Shinu Mathew.

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