MAX5387LAUD+

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The MAX5387LAUD+ is a digital potentiometer (digipot) family that provides a range of features beneficial for data acquisition applications. The device offers a wide range of features, including a wide rotate tolerance angle, low power consumption, and a flexible configuration that helps to reduce system cost. The device is relatively easy to implement by taking advantage of its three-wire configuration, allowing it to communicate with any microcontroller through an I2C or SPI interface. In data acquisition applications, digipots can be used for controlling system parameters such as gain and offset, or for calibrating external components. The MAX5387LAUD+ is designed for analog-to-digital converter (ADC) and digital-to-analog converter (DAC) gain and offset trimming, amplifier and filter attenuation, and voltage reference output level and temperature compensation.

Device Overview

The MAX5387LAUD+ consists of a three-terminal monolithic chip that contains an integrated voltage-controlled resistor. The device can be used to adjust the resistance of an external component or circuit, providing a continuous range of resistance values between two defined resistance points. The device can be operated in either the rotary mode or the stereo mode. In the rotary mode, the device can be used to adjust an external component, while in the stereo mode two parallel external resistors can be adjusted at the same time. In both modes, the device adjusts the external resistance through the use of an internal resistor array that is driven by a digital-to-analog converter (DAC). The MAX5387LAUD+ is designed for operation from a single +5V supply and draws a typical quiescent current of 1 microampere.

Application Field

The MAX5387LAUD+ digital potentiometer is a versatile device that can be utilized in a variety of data acquisition applications. In particular, the device is ideal for ADC and DAC calibration, voltage tracking, and amplifier, filter, and signal path set up. In these applications, the device provides an oft-required adjustable gain or offset component that enables the user to fine-tune the output signal for desired performance.

One of the major advantages of using the MAX5387LAUD+ is that it offers a wide rotational angle (up to 224 degrees) and a wide resistance range (10k ohms to 1.024M ohms) with excellent linearity, allowing it to be used in a variety of applications. Additionally, the device requires a low power supply voltage and can operate from a single +5V supply. With the low power requirement, the device is well-suited for the trimming of portable electronic equipment.

Working Principle

The MAX5387LAUD+ operates by taking advantage of an internal resistor array and a digital-to-analog converter (DAC). The device can be operated in either the rotary or stereo mode. In the rotary mode, the device adjusts an external component through a single resistor. In the stereo mode, two external resistors can be adjusted at the same time. The internal resistor array is connected in parallel with the external component, and the resistance of the external component can be adjusted by varying the voltage applied to the DAC.

In order to adjust the external component, the user can apply an appropriate voltage to the device\'s control input. The DAC output voltage is then converted to a resistance value, and the external component is adjusted accordingly. In this way, the user is able to switch between several defined resistance values, or control an adjustable resistance over a continuous range. Additionally, the device can be configured for a wide range of resistance values, offering the user a great degree of flexibility in the application of the technology.

Conclusion

The MAX5387LAUD+ digital potentiometer is an ideal solution for data acquisition applications that require adjustable gain or offset components. Its wide range of features and dual-mode design make it versatile enough to be used in a variety of applications, and its low power consumption allows it to be used in portable devices. Through its easy-to-use three-wire interface, the device can be easily implemented in any microcontroller-based system, offering an adjustable resistance with excellent linearity.

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