LMH6643QMM/NOPB Integrated Circuits (ICs)

Voltage - Input Offset:	1mV
Base Part Number:	LMH6643
Supplier Device Package:	8-VSSOP
Package / Case:	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Voltage - Supply, Single/Dual (±):	2.7 V ~ 10 V, ±1.35 V ~ 5 V
Current - Output / Channel:	75mA
Current - Supply:	2.7mA
Series:	--
Current - Input Bias:	1.6µA
-3db Bandwidth:	130MHz
Slew Rate:	135 V/µs
Output Type:	Rail-to-Rail
Number of Circuits:	2
Amplifier Type:	Voltage Feedback
Part Status:	Active
Packaging:	Tape & Reel (TR)

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LMH6643QMM/NOPB Application Field And Working Principle

Introduction

LMH6643QMM/NOPB is a very innovative, flexible, high-performance linear amplifier with a built-in reference voltage source. It has an excellent high-speed and wide dynamic range, making it ideal for applications such as instrumentation and circuit simulation. Its power drain is low, making it a better alternative in comparison to traditional linear amplifiers. Further, due to its low noise figure, it is highly suitable for low power applications. This article will further explore the application field and working principle of this amplifier.

Application Field of LMH6643QMM/NOPB

The versatility of this amplifier makes it suitable for a variety of applications. One of the most common use is as a buffer amplifier in applications where the output voltage need to be maintained constant, such as in filters and amplifiers. Additionally, it can be used for power followers, current followers, current feedback amplifiers and instrumentation systems.It is also widely used in active transducer applications due to its low input and output offset, low noise and low power dissipation. In these instances, the amplifier is capable of amplifying very small input and current signals with great accuracy. Furthermore, LMH6643QMM/NOPB amplifiers are also used in signal conditioning applications, such as signal conversion and isolation between circuits, as well as signal isolation and common mode rejection.

Working Principle of LMH6643QMM/NOPB

The working principle of the LMH6643QMM/NOPB amplifier is based on its reference voltage source. This reference voltage source is responsible for setting the bias voltage, or the voltage at which the amplifier starts to amplify, and the nominal voltage of the output. The reference voltage source is configured in the form of a voltage divider that divides the input supply voltage into two parts. The first part is used to set the bias voltage of the amplifier while the second part is used to set the output voltage. When the input signal is applied to the amplifier, the voltage on the input terminals change, thus causing the amplitude of the output signal to change proportionally.To further stabilize the working of the amplifier and reduce the drift, the reference voltage source can also be adjusted. This adjustment process is referred to as “zero-drift” and it allows the amplifier to maintain its nominal gain over a wide range of temperatures and conditions.

Conclusion

The LMH6643QMM/NOPB amplifier is a versatile, high-performance linear amplifier with an excellent high-speed and wide dynamic range. It can be used in a variety of applications, from powering followers and current followers, to signal conditioning applications and instrumentation systems. Its working principle is based on its reference voltage source, which consists of a voltage divider that sets the bias voltage and the nominal voltage of the output. This reference voltage source can also be adjusted to reduce its drift and further stabilize the performance of the amplifier.

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