Download e-book for kindle: A Designer's Guide to Instrumentation Amplifiers, 2nd by Charles Kitchin, Lew Counts

By Charles Kitchin, Lew Counts

ISBN-10: 0138896011

ISBN-13: 9780138896010

ISBN-10: 0916550206

ISBN-13: 9780916550202

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Additional resources for A Designer's Guide to Instrumentation Amplifiers, 2nd Edition

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Protecting in-amp inputs from high voltage transients and ESD events is very important for a circuit’s longterm reliability. Power dissipation is often a critical factor as input resistors, whether internal or external, must be able to handle most of the power of the input pulse without failing. ESD events, while they may be very high voltage, are usually of very short duration and are normally one-time events. Since the circuit has plenty of time to cool down before the next event occurs, modest input protection is sufficient to protect the device from damage.

An in-amp with a standard 1% metal film �� � ���� ���� Figure 5-10. An Example of How Differences in Input Signal Level Can Introduce Gain Errors Under zero signal conditions, there is no output signal and no resistor heating. When an input signal is applied, however, an amplified voltage appears at the op amp output. When the amplifier is operating with gain, Resistor R1 will be greater than R2. This means that there will be more voltage across R1 than across R2. The power dissipated in each resistor equals the square of the voltage across it divided by its resistance in ohms.

Figure 4 -14 shows its frequency response vs. sup ply voltage. 4-7 10M Chapter V APPLYING IN-AMPS EFFECTIVELY Dual-Supply Operation The conventional way to power an in-amp has been from a split or dual polarity power supply. This has the obvious advantage of allowing both a positive and a negative input and output swing. ������ Single-Supply Operation Single-supply operation has become an increasingly desirable characteristic of a modern in-amp. Many present day data acquisition systems are powered from a single low voltage supply.

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A Designer's Guide to Instrumentation Amplifiers, 2nd Edition by Charles Kitchin, Lew Counts


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