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krispots
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What will happen when the input voltages applied to the op amp is higher than its supplied voltage? Will it damage the op amp?
This will usually damage the op amp. Use either or both a decoupuling capacitor and a resister voltage divider. Also, there are isolation op amps available. Seekrispots said:What will happen when the input voltages applied to the op amp is higher than its supplied voltage? Will it damage the op amp?
With a high series input resistor there would be no problem.
Studiot said:Doesn't this divide the input with the amp input resistance, thereby reducing the actual voltage at the input pin?
skeptic2 said:I misunderstood your original question. I have had to use an opamp where the input voltage was higher than the supply voltage and I did that by limiting current to the input. Limiting the current does of course also limit the voltage to that pin. Opamps generally are flexible enough that the limited input voltage can be compensated for by the gain.
input voltages applied to the op amp
An op amp, short for operational amplifier, is an electronic device that amplifies the difference between two input voltages. It is commonly used in many electronic circuits, such as audio amplifiers, signal filters, and voltage regulators.
An op amp consists of a differential input stage, a gain stage, and an output stage. The differential input stage amplifies the difference between the two input voltages and sends it to the gain stage. The gain stage then amplifies the signal further and sends it to the output stage, which produces the final output voltage.
The two input voltages in an op amp are the non-inverting input and the inverting input. The non-inverting input is usually connected to the signal source, while the inverting input is connected to a feedback path or a fixed reference voltage.
The output voltage of an op amp can be calculated using the following formula: Vout = (Vin+ - Vin-) * A, where Vin+ is the non-inverting input voltage, Vin- is the inverting input voltage, and A is the gain of the op amp.
The maximum output voltage of an op amp depends on the power supply voltage and the gain of the op amp. It cannot exceed the power supply voltage, and it is typically limited by the op amp's internal circuitry. For most op amps, the maximum output voltage is equal to the power supply voltage minus a small voltage drop.