LMH6552MA/NOPB

Voltage - Input Offset:	1.5mV
Base Part Number:	LMH6552
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Voltage - Supply, Single/Dual (±):	4.5 V ~ 12 V, ±2.25 V ~ 6 V
Current - Output / Channel:	80mA
Current - Supply:	22.5mA
Series:	LMH®, PowerWise®
Current - Input Bias:	60µA
-3db Bandwidth:	1.5GHz
Slew Rate:	3800 V/µs
Output Type:	Differential
Number of Circuits:	1
Amplifier Type:	Current Feedback
Part Status:	Active
Packaging:	Tube

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LMH6552MA/NOPB application field and working principle

Introduction

The LMH6552MA/NOPB is a high-performance, single-supply, low-noise, gain-op amp featuring high-voltage and wide-bandwidth, ideal for applications in low-cost instrumentation, power, and control systems.

Application Field

The outstanding feature of this op amp is its 45 V/us slew rate and its capability of delivering up to 8A of peak current with minimal distortion, making it suitable for audio instrumentation, power monitoring, and measurement devices, where linearity and high speed are required. It is also suitable for high-current switching and power control applications, as well as in low-impedance drive systems, since its unique low-noise amplifier architecture can operate down to a very low supply voltage.Other applications of this op amp include wide bandwidth, high-frequency signal amplification in data acquisition and radio frequency (RF) systems. Its superior instrumentation capabilities and wide bandwidth make it well suited for use with precision sensors and digital-to-analog converters (DACs).

Working Principle

At the heart of the LMH6552MA/NOPB op amp is its unique symmetric current-mirror amplifier architecture that enables superior linearity over a wide range of frequencies and to achieve very low-noise performance. The device consists of a set of gain stages that are connected in series, and an output stage that is a current-mirror circuit, with two PMOS (p-channel metal oxide semiconductor) transistors and two NMOS (n-channel metal oxide semiconductor) transistors.The current-mirror output stage is then driven by the gain stages through an output buffer that is driven by a pair of PMOS and NMOS transistors. The current-mirror circuit allows the op amp to achieve linearity without the need for compensation capacitors.When the device is operating in the linear region, the current outputs of the gain stages and the output buffer are balanced, and the current-mirror output stage allows virtually the full output range of the device to reach the load without any additional distortion.

Conclusion

The LMH6552MA/NOPB is a versatile op amp that can be used in a wide range of applications. Its high-speed, low-noise architectures enable it to be used in high-frequency systems, while its symmetric current-mirror amplifier architecture enables it to achieve linearity over a wide range of frequencies. It is suitable for audio instrumentation, power monitoring and measurement devices, high-current switching and power control applications, and other systems.

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