MAX1455EVKIT-NS

Series:	--
Part Status:	Active
Type:	Interface
Function:	Sensor Signal Conditioner
Embedded:	--
Utilized IC / Part:	MAX1455
Primary Attributes:	--
Supplied Contents:	Board(s)
Secondary Attributes:	--

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Introduction
MAX1455EVKIT-NS is a circuit evaluation and demonstration board designed by Maxim Integrated. It is a dual-channel, low power amplifier with independent gain control, ideal for audiorelated applications. It is also suitable for evaluation and demonstration of dual-channel headphone and mobile phone applications. Furthermore, the MAX1455EVKIT-NS contains circuit components, including power management and headphone power amplifiers, that enable wider dynamic range and better sound quality. The kit is easy to use and cost effective. This article provides an overview of the various features of MAX1455EVKIT-NS evaluation and demonstration board and kits and explains its working principle. Features
The MAX1455EVKIT-NS has a wide range of features. It has two independent gain controls to adjust the gain of both channels separately. The two independent gain controls are selectable via on-board jumpers. The amplifier has a maximum current output of 150mA per channel. Furthermore, the MAX1455EVKIT-NS has an on-board microphone preamplifier and a headphone amplifier which provides comfortable listening experience.The MAX1455EVKIT-NS also contains two small signal amplifiers. Each amplifier can be connected to an on-board microphone, line-in ports, Bluetooth or USB digital input signal feed. The kit also includes an integrated low-power amplifier that can be configured as an output for headphones or a speaker. The amplifier gains can be adjusted via DIP switches on the board.The MAX1455EVKIT-NS can operate from a wide range of operating voltages from 2.7V to 3.6V. This allows the user to evaluate different voltages depending on the application. The board is also capable of being powered directly from the vehicle’s cigarette lighter port. Additionally, the board has two LEDs which indicate power on and off. Applications
The MAX1455EVKIT-NS dual-channel headphone amplifier is ideal for audio-related applications, such as headphones, mobile phones, laptops, and other portable media players. In addition, the board can be utilized for prototyping and product development in the automotive market. This includes in-car stereo systems, car telephony, hands-free kits, and vehicle navigation systems. Working Principle
The MAX1455EVKIT-NS consists of two independent audio amplifiers, a microphone preamplifier, and a headphone amplifier. The audio amplifiers are connected to a power management IC, which supplies power to the headphone amplifier and preamplifier. The two independent gain controls are configured with on-board jumpers and an external potentiometer can be connected to the board to adjust the amplifier gains. The microphone preamplifier is used to amplify the input signal to a level suitable for input to the headphone amplifier. The input signal is then fed to the headphone amplifier which amplifies the signal and drives the headphones. The headphone amplifier can provide a maximum of 150mA per channel. The system is powered by a voltage between 2.7V and 3.6V, enabling evaluation at different voltages. The headphone amplifiers also have an integrated low-power amplifier which can be used to connect a speaker for audio output. Conclusion
The MAX1455EVKIT-NS is a dual-channel headphone amplifier with independent gain control. It is ideal for audio-related applications such as headphones, mobile phones, laptops, and other portable media players. It is also suitable for automotive application development as it can be powered directly from the vehicle’s cigarette lighter port. The on-board microphone preamplifier can be used to amplify the input signal to a suitable level for amplification by the headphone amplifier. Additionally, the kit has DIP switches for adjusting the amplifier’s gains. This evaluation and demonstration board and kit is easy to use and cost effective.

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