Memory Type:	Volatile
Base Part Number:	MAX5391
Supplier Device Package:	16-TQFN (3x3)
Package / Case:	16-WFQFN Exposed Pad
Operating Temperature:	-40°C ~ 125°C
Resistance - Wiper (Ohms) (Typ):	200 (Max)
Temperature Coefficient (Typ):	35 ppm/°C
Tolerance:	±25%
Features:	--
Voltage - Supply:	1.7 V ~ 5.5 V
Series:	--
Interface:	SPI
Resistance (Ohms):	100k
Number of Taps:	256
Number of Circuits:	2
Configuration:	Potentiometer
Taper:	Linear
Part Status:	Active
Packaging:	Tube

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Data Acquisition - Digital Potentiometers

MAX5391NATE+ Application Field and Working Principle

Digital potentiometers are integrated circuits that feature the same basic functionality as the potentiometers found in older analog systems. MAX5391NATE+ is a single digital potentiometer device that offers vast range of applications in data acquisition and control.This device has a functional range between 10 kiloΩ and 500 kiloΩ and it provides a linear or logarithmic adjustability of the resistance value, depending on the application. The terminal design becomes an important aspect when choosing a digital potentiometer, as it should help minimizing external noise and potential problems during the operation of the device. All terminals of the MAX5391NATE+ have four pins: 3-terminal (A, B, W) plus one ground.The main application field of MAX5391NATE+ is data acquisition, which requires a changeable output current to convert analog signals into digital signals. Digital potentiometers provide a higher level of accuracy and flexibility of adjustment than conventional analog potentiometers. Also, the digital potentiometers are extremely precise and repetitive, with very low levels of variation between conductive paths.In data acquisition applications, MAX5391NATE+ is used to accurately adjust the desired electrical characteristics. For example, it can be used to adjust the gain of an amplifier or an oscilloscope, the frequency of a tone generator, or the offset of a signal generator. The precise adjustment of the potentiometer settings ensures that the output signals match the desired conditions, thus providing accurate data acquisition.The working principle of MAX5391NATE+ can be explained as follows: when a binary code is applied, it switches the appropriate segments of the resistor into the circuit. In a resistance network, the combination of different resistances determines the resulting value of a certain circuit parameter, such as voltage, current, or power.The MAX5391NATE+ is suitable for use in many types of applications, due to its various features. The device is characterized by an active low write voltage and an unadjusted resistance range of 10 kiloΩ to 500 kiloΩ. It also provides a low-level standby current, a noise-free operation, and a wide operating temperature range of -20°C to 125°C.In summary, the MAX5391NATE+ is a high-performance digital potentiometer that can be used for various data acquisition and control applications. It offers a wide range of features, including a linear or logarithmic adjustment of the resistor values and high accuracy and precision. This device is also reliable, thanks to its four-pin terminal design, which helps to minimize external noise and potential related problems during operation.

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