Maxim Integrated MAX5387MAUD+ Dual 256-Tap Volatile Digital Potentiometer

The MAX5387MAUD+ by Maxim Integrated is a dual, 256-position, digital potentiometer designed to function as a compact variable resistor or voltage divider. This integrated circuit (IC) is ideal for applications requiring precise digital control over analog signals within a wide range of industries, including consumer electronics, communication systems, and portable battery-powered devices.

With its small 14-pin TSSOP package, the MAX5387MAUD+ offers a space-saving solution for designs where board space is at a premium. The device operates from a single +2.7V to +5.5V supply, making it versatile for various power environments. Its volatile memory ensures that the wiper position defaults to the midscale position upon power-up, providing a predictable start-up state.

The digital potentiometer features two independent channels, each with 256 tap points, allowing for fine resolution adjustments. It uses an I²C-compatible serial interface for communication, enabling easy adjustment of the wiper position by microcontrollers or other digital systems. The MAX5387MAUD+ can handle a maximum ±5mA current through the potentiometer terminals and offers an end-to-end resistance of 10kΩ, which is typical for general-purpose applications.

Among its safety features, the MAX5387MAUD+ includes a 50kΩ nominal resistance between terminals when the device is powered off, providing an additional layer of protection for the connected components. The potentiometer's wiper resistance is low, typically at 70Ω, which minimizes the effect on the analog signal and ensures high accuracy and stability over the entire operating temperature range of -40°C to +125°C.

Designers can also appreciate the built-in power-on reset circuit and the daisy-chain capability of the serial interface, which simplifies the design of applications requiring multiple digital potentiometers. The MAX5387MAUD+ is a reliable and efficient choice for applications such as volume control, LCD screen adjustment, filter tuning, and much more, providing a high level of control in a compact and power-efficient package.