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Current Sense
Related Posts

  • Forum Post: Re: Low cost high side currrent measurement

    Ron Michallick
    To get a high side current monitor to work with 120V AC will require very high common mode rejection ratios. The voltage across the sense resistor is quite low compared to the main AC voltage. It will be much easier to get a low side current sense implemented.
    on May 3, 2010

  • Forum Post: INA209

    Raghu Ranganathan
    I am currently working on an automatic sun tracking system consisting of a 85 W solar panel, microcontroller, and stepper motor. I need to monitor the output power of the solar panel at regular intervals. I was wondering if the INA209 chip would satisfy my requirements, and if it did, how should I connect...
    on Jul 19, 2010

  • Forum Post: Re: How to build a 100uA current source?

    Nichole Oljaca
    Current output current shunt monitors also can make good current sources. A differential measurement over a shunt resistor produces a corresponding current output that can be adjusted by adjusting the voltage drop over the shunt resistor. TI's INA138 would be a good example although this has a minimum...
    on Dec 2, 2010

  • Forum Post: INA213 max. input voltage on Vcc=0V

    Martin Maurer67449
    Hello, I'm using the INA213. In my application it's possible that Vcc=0V and on the analog input (IN+; IN-) pins are 5V. In the datasheet is written that the analog input (IN+; IN-) pin are able to handle up to +26V. There is no comment of Vcc. => The INA213 isn't destroyed if Vcc=0V and...
    on Feb 21, 2011

  • Forum Post: Please recommend an amp for my application

    Inyong Kwon
    Hello. I am a graduate student in U of Michigan. Our research group has made photodetectors by ourselves. It has been very successful. Now, for the next step, we would like to see the current shape from our detector on a oscilloscope. So, we are looking for special amplifiers because the output current...
    on Sep 13, 2011

  • Forum Post: INA219 Shunt Voltage Reading

    Justin Forrester
    Hi, I am working with the INA219 and I am getting incorrect shunt voltage readings. They appear to be double what I would expect given my current load and what I measure across the resistor with a voltmeter. My test setup is as such: 2m Ohm shunt resistor, 100mA load, bus voltage of 11.5. This...
    on Sep 23, 2011

  • Forum Post: lmp8640 problem

    Tan Chin Yew
    halo all, i am using the lmp8640, and Vcc=5, Vout to adc is 1.5V, sense resistor =3mili ohm; the problem with this high voltage current sense amplifier is too small, and only written AF6A, so i didnt which side is the 1st pin ? and the value of filter resistor and capacitor is...
    on Apr 2, 2012

  • Forum Post: Need suggestion for current limiting with current sensing

    Konstantinos Vasileris100221
    Hello I need to make a current limiting device that senses current and depending on the value of it is controlling the duty cycle of a PWM signal. My though is to use a differential amplifier or an instrumentation to sense the voltage drop across the sense resistor. Then the output of the amplifier...
    on Apr 11, 2012

  • Forum Post: how can i design the circuit to amplfy the current singal from 8.7nA to 600uA.

    zumao xu
    Hi: our current singal is from 8.7nA to 600uA ,and the singal frequecy is less than 20hZ ,the AD reference voltage is 1.2V, and the measurement accuracy is 0.5%. At first ,i selected the OPA2376 to amplify the singal becuase the offset voltage and bias current is very good for us .the circuit stucture...
    on Nov 26, 2012

  • Forum Post: TLC2274A in low side current sense application

    Mark Meisner
    I am using part of this quad amplifier as a differential amplifier in a low side current sense application. T he circuit in question is within the red box labeled "current sense". The voltage sense circuit functions properly, so the power and ground is fine. To test the circuit I took out...
    on Feb 27, 2013

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