How do you damage an op amp?
Excessive input current over long periods of time or even short periods of time, if the current is high enough, can damage the op amp. This damage can result in a shift in the electrical specification parameters beyond the data sheet’s guaranteed limits; it can even cause a permanent failure of the op amp.
What is ADC circuit?
Analog to Digital Converter (ADC) is an electronic integrated circuit used to convert the analog signals such as voltages to digital or binary form consisting of 1s and 0s. Most of the ADCs take a voltage input as 0 to 10V, -5V to +5V, etc., and correspondingly produces digital output as some sort of a binary number.
When to use differential overvoltage protection circuit?
This is common in industrial and automotive solenoid control applications (Figure 1) where fault conditions caused by short circuits may arise, exposing the current sense amplifier to a high differential input voltage that may reach the same potential as the battery.
How much current can pass through differential overvoltage diodes?
Basic overvoltage protection circuit. Both the maximum rated voltage and the maximum input current tolerated by a protection circuit vary from device-to-device. As a general rule of thumb, limit the current passing through the internal differential protection diodes to 3 mA unless there is a specification indicating a larger value is acceptable.
How is overvoltage protection used in precision amps?
Figure 1. Classic clamping circuit for overvoltage protection. Although the classic circuit in Figure 1 protects the op amp inputs, it contributes a significant amount of error to the signal path. Precision amps generally have input offset voltages (V OS) in the microvolts range.
How are ESD diodes used for overvoltage protection?
The integrated ESD diodes act as overvoltage clamps to protect the part. Depletion mode FETs are in series at each input before the ESD diodes. They provide the dynamic resistance, which increases when the input voltage (V CM) exceeds the supply voltages.