LT1795CFE#PBF

LT1795CFE#PBF Application Field and Working Principle

The LT1795CFE#PBF is an operational amplifier designed for a variety of linear applications. This device features a wide voltage gain range, low power consumption, and fast settling time. It is ideal for audio, analog-to-digital conversion, instrumentation and control systems. Understanding the working principle of the LT1795CFE#PBF is necessary to get the most out of this op-amp in applications.

Field of Application

The LT1795CFE#PBF is suitable for a wide array of applications including audio mixing, analog-to-digital converters, instrumentation, and voltage regulation systems. It features a rail-to-rail output so it can provide an output signal close to the power rails. It also has an input common-mode voltage range of 0V to 4.5V and an output voltage range of 0V to 4.5V. The device can also provide a high-quality signal with a low THD of 0.001%.

The low-power operational amplifier also features a fast settling time, which makes it ideal in applications where fast responses are necessary. The LT1795CFE#PBF can provide signal settling time of 5 IDB in only 4-5 µs and a signal-to-noise ratio of greater than 65 dB.

Working Principle

At the heart of the LT1795CFE#PBF is a differential amplifier circuit composed of two field effect transistors (FETs) and an input resistor. The circuit is designed such that the voltage difference across the two FETs determines the output voltage. This output voltage is the amplifier’s gain-control voltage.

The gain-control voltage is determined by comparing the input voltage to a reference voltage, which is in turn generated by a precision voltage reference circuit. The reference voltage is compared to the input by the amplifier’s non-inverting and inverting inputs. If the input voltage is higher than the reference voltage, the amplifier’s output is a high voltage, which causes the amplifier’s gain-control voltage to increase. Conversely, if the input voltage is lower than the reference voltage, the amplifier’s output is a low voltage, which causes the amplifier’s gain-control voltage to decrease.

The amplifier’s output voltage is the difference between the voltage across the two FETs multiplied by the gain-control voltage. This means that the output voltage is a function of the input voltage and the gain-control voltage. The amplifier’s output voltage is then inverted, making it a negative gain-control voltage and ensuring that it produces a negative output voltage.

The LT1795CFE#PBF operational amplifier is designed to provide a fast response time and high signal-to-noise ratio. This makes it the ideal device for a wide range of applications from audio to instrumentation and control systems.