LMH6658MM

LMH6658MM Application Field and Working Principle

The LMH6658MM is a programmable precision linear amplifier designed to operate over a wide range of voltages and frequencies. It is designed primarily to provide an amplifier stage with a wide dynamic range and array of gain settings capable of driving large capacitive loads. It is suitable for high current and high voltage applications such as audio power amplifiers, voltage controlled amplifiers, mixer amplifiers, and instrumentation systems.

Features and Benefits

The LMH6658MM provides a high amount of voltage headroom, and is capable of driving large capacitive loads. It is compact in size and low power consumption, and offers a wide range of gains settings. Additionally, the LMH6658MM has an exceptionally low input-referred noise and distortion performance. These features make it ideal for audio, video, and other high frequency, high precision applications.

Working Principle

The LMH6658MM is based on a Gilbert differential stage topology. The differential stage offers improved dynamic performance with a wide gain range, while at the same time maintaining a low input noise and distortion performance. The device also features optional analog or digital control of the gain, allowing the gain to be dynamically adjusted over a wide range. This provides flexibility in controlling the output level of the amplifier.

The input signals of the LMH6658MM are first converted to the differential form and then amplified by the differential stage. The differential stage provides a high gain and excellent linearity, despite the high frequency content of the input signals. The device also offers an optional output stage, which is used if the load capacitance is high or if high currents are required. The output stage offers improved performance and better stability in such cases.

Applications

The LMH6658MM is suitable for a number of applications, such as audio power amplifiers, voltage controlled amplifiers, mixer amplifiers, and instrumentation systems. It is also used in frequency synthesizers and communications systems, as well as in medical instrumentation and home theater systems. Audio applications include audio power amplifiers, AV receivers, preamps and ADC/DAC modules.

Conclusion

The LMH6658MM amplifier is a versatile and cost effective device that is suitable for a wide range of high frequency, high precision applications. It features an exceptionally low input-referred noise and distortion performance, while also providing a wide range of gains settings. Its low power consumption and small size make it an ideal solution for many applications.