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LMV393-SM1-R Datasheet(PDF) 4 Page - Unisonic Technologies |
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LMV393-SM1-R Datasheet(HTML) 4 Page - Unisonic Technologies |
4 / 11 page LMV393 LINEAR INTEGRATED CIRCUIT UNISONICTECHNOLOGIESCO.,LTD 4 of 11 www.unisonic.com.tw QW-R104-004,A APPLICATION CIRCUITS Basic Comparator A basic comparator circuit can convert analog signals to a digital output. The UTC LMV393 needs a pull-up resistor connected to the positive supply voltage which can make output switch properly. So that when the internal output transistor is off, the output voltage will be pulled up to the external positive voltage. The resister should be chosen properly. The higher resister can reduce the power dissipation. the lower resister can improve the capacity of loading output. The range of resister should between 1k to 10kΩ. The Output voltage of the comparator will be high if the input voltage at the non-inverting pin is greater than the reference voltage at the inverting pin. On the other hand it will be low. Comparator with Hysteresis The comparator may oscillate or produce a noisy output if the applied differential input voltage is near the comparator’s offset voltage, especially when the input signal is moving slowly across the comparator’s switching threshold. Addition of hysteresis or positive feedback can solve this problem. Inverting Comparator with Hysteresis It requires a three resistor network that is referenced to the supply voltage VCC of the comparator. When the output voltage is high, these resistors can be represented as R1 // R3 in series with R2. The lower set input voltage is defined as: |
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