LMH6619MA/NOPB

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

LMH6619MA/NOPB is a monolithic low-power IC precision amplifier. It is a wideband, high-performance current-feedback amplifier in 8-Pin MSOP package. With a constant bandwidth of 130 MHz and a slew rate of 290 V/μs, it is suitable for most precision, high-speed applications. This article explains the typical application fields, working principle and internal circuit of this amplifier.

Application Field:
The LMH6619MA/NOPB amplifier is mainly used for video and RF sampling applications. Since the amplifier combines both current and voltage modes, it is ideal for use in audio preamplifiers, active filters, and sound generators. The device also provides high-power supply rejection ratio, which is necessary for sensitive applications such as test and measurement systems. Additionally, its high open loop gain and common-mode rejection ratio make it a good choice for post-amplification of sources with limited slew rate.

Working Principle:
The LMH6619MA/NOPB is a current-feedback amplifier with a unique design that combines both current and voltage modes to enjoy the benefits of both technologies. The device features a widely-tunable gain bandwidth range of 1 MHz to 130 MHz, which allows it to adapt its performance to various applications. It can also operate from a wide supply range of ±2.7 V to ±18 V. Additionally, the output current is fully independent of the input voltage and other external parameters, making it a versatile amplifier for precision frequency response control.

Internal Circuit:
The internal architecture of the LMH6619MA/NOPB is composed of a differential input, current-feedback amplifier, error amplifier and open-loop gain control circuits. The amplifier operates from a single 3.3 V or 5 V power supply. The input differential pair is based on the unity-gain stability architecture to provide low-power operation while maintaining high dynamic range. The current-feedback amplifier block is an improved version of the classic trans-impedance amplifier. It is optimized for very low gain error and high slew rate. The open-loop gain control (OLGC) is based on advanced loop compensation techniques for increased stability.

In summary, the LMH6619MA/NOPB is a monolithic high-performance current-feedback amplifier. It is designed for video and RF sampling applications. The amplifier\'s wideband, high-performance current-feedback amplifier provides a constant bandwidth of 130 MHz and a slew rate of 290 V/μs, making it suitable for most precision, high-speed applications. The internal architecture of the amplifier consists of a differential input, current-feedback amplifier, error amplifier, and open-loop gain control circuits.

The specific data is subject to PDF, and the above content is for reference