LT1881CS8#PBF

Voltage - Input Offset:	30µV
Base Part Number:	LT1881
Supplier Device Package:	8-SO
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 70°C
Voltage - Supply, Single/Dual (±):	2.7 V ~ 36 V, ±1.35 V ~ 18 V
Current - Output / Channel:	40mA
Current - Supply:	850µA
Series:	--
Current - Input Bias:	150pA
Gain Bandwidth Product:	1MHz
Slew Rate:	0.4 V/µs
Output Type:	Rail-to-Rail
Number of Circuits:	2
Amplifier Type:	General Purpose
Part Status:	Active
Packaging:	Tube

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Introduction

The LT1881CS8#PBF is an instrumentation, OP Amp, and buffer amplifier. It is designed for various applications, and this article will discuss its application field and working principle.

Application Field

The LT1881CS8#PBF is a monolithic bipolar integrated circuit used for accurate signal amplification. The device has plenty of features, including a high input impedance, which makes it suitable for usage in a wide variety of applications. It can be used in an oscilloscope, analog-to-digital converter, signal processing systems, signal conditioning circuits, and test instruments. One of its advantages is that it is capable of amplifying signals accurately over a wide range of frequencies. This is useful when measuring signals which range in frequency. Another is high common-mode rejection ratio, making it stable when measuring signals which also have a common-mode component. A design feature of the LT1881CS8#PBF is that it is unity-gain stable, meaning it will not oscillate when used as a voltage follower. This makes it suitable for buffering low impedance signals and driving low capacitance loads when used as an amplifier.

Working Principle

The LT1881CS8#PBF is a voltage-feedback amplifier designed for high-speed, low-power applications. Its input stage is a cascode current mirror configuration, which results in a high input impedance and low-noise. The amplifier is unity-gain stable, as mentioned, due to its wide bandwidth. The amplifier also has high common-mode rejection ratio, due to its wide-band input stage filter. This filter allows the circuit to reject common-mode signals and reduce their effect on the gain accuracy. The LT1881CS8#PBF also has fast settling time, meaning that it can quickly respond to changes in input. This makes it suitable for high-speed applications such as data acquisition or test and measurement applications.

Conclusion

The LT1881CS8#PBF is a high-speed, low-power amplifier suitable for a variety of applications. It features a high input impedance, unity-gain stability, wide bandwidth, and high common-mode rejection ratio. These features make it suitable for usage in oscilloscopes, analog-to-digital converters, signal processing systems, and signal conditioning circuits. The LT1881CS8#PBF also has fast settling time, making it suitable for high-speed applications.

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