Quantcast
Channel: Amplifiers forum - Recent Threads
Viewing all 18754 articles
Browse latest View live
↧

INA240: difference between INa240, INA240-Q1, INA240-SEP

April 28, 2019, 2:27 am
$
0
0

Part Number:INA240

Hello,

What is the difference between INa240, INA240-Q1 and INA240-SEP (advantages and drawbacks )? Which one is the best  choice  for  precise servo motor control? 

Regards,

Mohammad.

↧
Search

OPA192: The relationship between VCM and Vos of OPA192

April 28, 2019, 6:50 am
$
0
0

Part Number:OPA192

Hi team,

1. When I looked at OPA192 datasheet, I found below figures, could you please explain them for me? what is the relationship among Vs, Vcm and Vos?


2. The customer's schematic is as below. The value of VCM is 12V and the positive power supply value is 16V. Actually the positive power supply value can change and the worst value tested is 14.1V. So do you think the customer's application has any risk? It is an urgent case. 

Thanks very much!

Sophia Yao

↧
↧

XTR110: XTR realize +/-200 mA application consult

April 28, 2019, 6:44 pm
$
0
0

Part Number:XTR110

Hi team,

   I want to use XTR110 realize +/-200 mA AO circuit, I have seen a circuit in the DS fig.8. But I am clear about how VIN can control T2 on/off? Could you share me the principle? Thank you for your help here.

↧

TINA/Spice/LMH7324: LM7324 have not output lVDS

April 28, 2019, 11:28 pm
$
0
0

Part Number:LMH7324

Tool/software:TINA-TI or Spice Models


We are based on the following simulation graphic design，The output is an LVDS to xilinx's FPGA。The board we designed is tested with a standard square wave signal output by a signal generator and designed as a zero-crossing comparator,but the outp and outn  all is DC1.8V, What is the reason for this?,must use VT （VT=VCCO-2V=0.5V）Provide offset current?

↧

ISO224: DPPM/FIT/MTBF details

April 28, 2019, 11:35 pm
$
0
0

Part Number:ISO224

Hi, 

One of my customer is looking for DPPM/FIT/MTBF details for ISO224. These are not available online to download for this device. Please suggest. 

Regards,
Naveen

↧
↧

INA118: I AM USING INA118 FOR THE AMPLIFICATION OF SMALL SIGNAL WHICH IS IN A PULSED FORM.

April 29, 2019, 3:04 am
$
0
0

Part Number:INA118

THE PROBLEM THAT I AM FACING IS THAT WHEN I OBSERVE THE SIGNAL THE SOME SIGNALS ARE OKAY BUT SUM SIGNAL GETS CLIPPED OF EVEN IF THEY ARE 20% VALUE OF THE SUPPLY VOLTAGE. I HAVE CHECKED EVERY PARAMETER LIKE SLEW RATE , BANDWIDTH , GAIN.

I HAVE APPLIED THE GAIN OF 200. CAN ANYONE HELP ME WHY THIS SORT OF OUTPUT IS COMING? WHY IS THE PROVIDING UNSTABLE OUTPUT?

↧

TLV6700: Schematic review

April 29, 2019, 3:35 am
$
0
0

Part Number:TLV6700

Hi,

Please help to review schematic about TPS2121 + TLV6700 application.

VDCIN_ACC is a power source operating in 12V or 6~8.4V, our customer want to use TPS2121 + TLV6700 to get both OVP and UVP.

We assume 3 scenario (OVP, Normal, UVP) as attachment.

The OVP is setting at about 15.427V, UVP is at about 5.483V.

Please help to check is this structure can meet our application or not, thanks~

(Please visit the site to view this file)

↧

LM358: .

April 29, 2019, 3:33 am
$
0
0

Part Number:LM358

Hi folks.

I am trying to build a motor speed controller using labview. I got the labview diagram circuit but struggling with the motor circuit. 

 

I am using Arduino uno and DAC (MCP4922). If i connect any component after MCP4922, the voltage drops dramatically.  I want to make the motor operate according to the voltage, but it just working really slow..  I've used different motor to check if it is a motor problem, and i've measured the output voltage using digital multimeter- measuring directly from the DAC, i get the right voltage, but whenever i connect LM358(in above circuit i couldn't find the LM358 so just put it instead) or the diode, only few voltage comes out so the motor is not working according to the voltage we control. I think the problem is that too large current is taking through the motor and can not find the way out. Please tell me how i can make it work. 

↧
Search

LM2907-N: Operating voltage

April 29, 2019, 6:28 am
$
0
0

Part Number:LM2907-N

Hello. Simple question, I think.  What is the lowest operating voltage of the LM2907?  I may be incorrect, but I cannot determine this from the data sheet.  Thank you.

↧
↧

PGA309EVM-USB: : Check Hardware Connection and Reboot the Software

April 29, 2019, 8:35 am
$
0
0

Part Number:PGA309EVM-USB

Hi,

I just started using the PGA309EVM-USB.

I am having problems with the Evaluation Software recognizing the hardware. 

I am running Win10 Pro

All 4 power LEDs are on and i can measure voltage at the power supply VS1 pin of the PGA309 board.

I have double checked all jumper settings on both the USB-DAQ and PGA309 Test board.

Th  Address Select Pins Jump 4 and 5 on USB-DAQ are set to L.

Everytime i start the Evaluation Software i get the error message "Check Your Hardware Connection and Reboot the Software".

Checking the Windows Device Manager on the control Panel shows the device as an 'Unknown Device'...i am missing a driver?

↧

INA190: Using INA190 for motor low side current sense

April 29, 2019, 8:39 am
$
0
0

Part Number:INA190

Can this be used for motor low-side current sense? If not, why?

↧

LM139AQML: ESD mitigation above 600V

April 29, 2019, 10:45 am
$
0
0

Part Number:LM139AQML

I need to protect the comparator inputs to meet 2kV HBM ESD. Can external Schottky diodes be used to clamp the inputs to the supply rail and ground to provide greater ESD immunity over the 600V specified. Do you have any data on internal clamp diode voltage versus current?

↧

OPA2673: NC pin and PowerPad connection

April 29, 2019, 11:06 am
$
0
0

Part Number:OPA2673

To whom it may concern,

I just want to confirm about the connections of NC pins and PowerPad.

Can NC pins be left unconnected?

Must PowerPad be connected to VS- or can it be left unconnected? (I have this doubt because PowerPad is typically connected to GND instead of VS-.)

Thank you very much.

Weiyu

↧
↧

LMH6321: solder questions

April 29, 2019, 11:17 am
$
0
0

Part Number:LMH6321

Team,

How to solder the metal pad at the chip bottom to the copper pad on the board? I assume I need to draw an area that will have solder paste applied. If solder by hand, how can it be done?

Regards,

Brian 

↧

INA333: INA333 confirm schematic

April 29, 2019, 6:43 pm
$
0
0

Part Number:INA333

Dear,

we first time use INA333, Please double confirm as below schematic

If any suggestion, Please advise me.

Thanks,

Best regards,

Lawrence.

↧
Search

Is Figure 3 on OPA2658 datasheet right?

April 29, 2019, 9:26 pm
$
0
0

Hello,

I am reading the datasheet of OPA2658, and found in FIGURE 3. Single Supply Operation, the feedback resistor was connected between inverting input and output.  Is this figure right? Or OPA2658 is a special amplifier.

Thanks.

Junwei

↧

OPA2277: Output voltage spike when input signal zero-cross

April 29, 2019, 11:02 pm
$
0
0

Part Number:OPA2277

Dears,

My customer use OPA2277 to detect AC input voltage as below circuit. The input signal is AC(50Hz) 0.2V pk voltage. But customer found big output voltage spike when input signal zero cross, as below test waveform(yellow line is input INVL, blue line is output INV.I+).

Customer also do another test, they use 2pcs OPA177 to replace OPA2277, and then under same condition and input signal, there is no any voltage spike for output of OPA177. So not sure what's problem for OPA2277. Could you please help to check this? Thanks.

↧
↧

OPA209: OPA209 have around 0.5V offset at no load

April 30, 2019, 12:43 am
$
0
0

Part Number:OPA209

Hi team,

My costomer use OPA209 for output current sensing and Rsense is 0.25 ohm, please refer to below circuit.

But the OPA209 have around 0.5V offset at no load, after change OPA365 this issue solved.(verify on 20 samples)

I would like to know the root cause or which OPA parameter cause this issue.

Thanks.

↧

INA220: About INA220 address latching

April 30, 2019, 1:08 am
$
0
0

Part Number:INA220

hi dear supporting team,

for INA220 Address latching, will it be identify on powering up or over every time I2C communication lauching? ii.e if after power up, we change the address, will it be identified ? tks a lot!

↧

OPA180: Is the input offset voltage really only positiv?

April 30, 2019, 1:24 am
$
0
0

Part Number:OPA180

Hello everybody,

in the datasheet of the OPA180 is the Input Offset Voltage only positiv.

Typicall 15 uV and Max 75 uV. You can find it in 7.7 Electrical Charecteristic

Is there a mistake in the datsheet?

I would expect that the input offset voltage is negativ or positv.

Like Typical +-15 uV and Max +-75 uV

In all the datasheets of Ti Op Amps I have seen it the input offset voltage positiv and negativ.

Here is the Link of the datasheet: www.ti.com/.../opa180.pdf

Best regars,

Marvin

↧
Viewing all 18754 articles
Browse latest View live
Search
<script src="https://jsc.adskeeper.com/r/s/rssing.com.1596347.js" async> </script>