MAX5427ETA+T

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Digital Potentiometers, or digital pots, come in a variety of shapes, sizes and configurations. The MAX5427ETA+T, from Maxim Integrated, is one such example. It features a 9-bit wiper, along with a volatile and non-volatile memory, and is offered in a space-saving, 5-pin SOT-23 footprint.

Key Features

The MAX5427ETA+T includes some key features that make it stand out from other digital pots. These include:

• 9-bit wiper resolution
• Operating temperature range of -40°C to +85°C
• Non-volatile, zero-step EEPROM
• User-programmable reset default
• Low power consumption
• Compatible with I2C and SMBus interfaces
• Small 5-pin SOT-23 footprint

Application Field

The MAX5427ETA+T provides a versatile solution for data acquisition, as it can be used in a variety of applications - from robotics to HVAC systems, home automation, industrial control, automotive and medical. It can be used in any application that requires precise control over a variable electrical signal, such as voltage and current. It is also useful in controlling the speed and direction of DC motors, and in providing control of a servo or stepper motor.

Working Principle

At its core, the MAX5427ETA+T is a digitally controlled variable resistance or potentiometer. It is composed of a resistor array and a wiper, which is controlled by the digital input. The voltage output is proportional to the position of the wiper across the resistor array. The resolution of the digital pot is determined by the number of “taps” or steps between the input and output terminals, which is 9-bits in the case of the MAX5427ETA+T. When the digital input is switched from one state to another, the wiper jumps from its current position to the new one, as determined by the input code.

The MAX5427ETA+T also has a non-volatile zero-step EEPROM memory, which allows the device to store setting changes, even when power is removed or lost. The device also has a user-programmable reset default, which can be programmed to the desired power-on default condition with just a few lines of code.

Conclusion

The MAX5427ETA+T is a versatile, 9-bit digital potentiometer that is suitable for many applications. It is cost effective, with a small 5-pin SOT-23 footprint, and is easy to control with I2C and SMBus interfaces. With its non-volatile memory, user-programmable reset default, and low power consumption features, the MAX5427ETA+T makes data acquisition easy, reliable, and precise.

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