Is lm358 opamp good for measuring highside current? Figure 1. Non Contact AC Voltage Sensor Using LM358 Here is a very useful project of a non contact AC voltage sensor circuit. In this project, we are going to make a day and night indicator (or dark and light indicator) which will indicate if there is a dark or light in the surroundings. Note 1: For operating at high temperatures, the LM358/LM358A, LM2904 must be derated based on a +125˚C maximum junction temperature and a thermal resistance of 120˚C/W for MDIP, 182˚C/W for Metal Can, 189˚C/W for Small Outline package, and 230˚C/W for … current sensing, which will be discussed in more detail in the following section. Therefore, current sensing resistors are rarely used beyond the low and medium current sensing applications. My best LM358 gets to about 1.2V below Vin. then use the op amp to measure the voltage difference, note im using an arduino so 5v is max for input analog. Electrical Characteristics V+ = +5.0V, unless otherwise stated Parameter Conditions LM358 LM2904 Units Min Typ Max Min Typ Max Input Offset Voltage (Note 5) , T A = 25˚C 2 7 2 7 mV Input Bias Current I In this circuit, we will show how to build a current sensor circuit. LM358 - Low-power dual op-amps with low input bias current, LM358DT, LM358QT, LM358D, LM358ST, LM358PT, STMicroelectronics DIY Current Sensor for Arduino: Hello there, hope you are doing good and in this tutorial I will be showing you how i made a current sensor for Arduino using some very basic electronic components and a home-made shunt. 7 years ago. is the lm358 going to be good enough? 4. Trying using a rail to rail opAmp or redesign your circuit like: (a) power your opamp by 10.5V or (b) using a current sensing IC like INA219 which is designed for current sensing. HIGH-SIDE CURRENT SENSING IMPLEMENTATION High-side current sensing is typically selected in applications where ground disturbance cannot be tolerated, and short circuit detection is required, such as motor monitoring and control, overcurrent protection The TSC101 high-side current sense amplifier features a 2.8 to 30 V input common-mode range that is independent of the supply voltage. Some applications of this circuit, are street light controlling, home/office light controlling, day and night indicators, etc. A current sensor circuit is a circuit that can sense current going through it. Author: Yang Zhen Microchip Technology Inc. Current Sensing Circuit Concepts and Fundamentals need its output read form mcu. Posted by . These are designed for the operation of this device from single supply or split supplies for a wide range of voltages.

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