MCP4431T-502E/ST

Memory Type:	Volatile
Base Part Number:	MCP4431
Supplier Device Package:	20-TSSOP
Package / Case:	20-TSSOP (0.173", 4.40mm Width)
Operating Temperature:	-40°C ~ 125°C
Resistance - Wiper (Ohms) (Typ):	75
Temperature Coefficient (Typ):	150 ppm/°C
Tolerance:	±20%
Features:	Selectable Address
Voltage - Supply:	1.8 V ~ 5.5 V
Series:	--
Interface:	I²C
Resistance (Ohms):	5k
Number of Taps:	129
Number of Circuits:	4
Configuration:	Potentiometer
Taper:	Linear
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Data Acquisition – Digital PotentiometersDigital Potentiometers, also known as digipots, allow users to digitally adjust, control and program devices, such as amplifiers, microcontroller and other precision instruments. They are often used for gain control, linearizing signals and performing biasing adjustments.The MCP4431T-502E/ST is a low-cost, high-performance, single-channel digital potentiometer. The device is designed with a dual-channel SPI interface, which allows users to easily set and maintain the wiper setting as well as configure the device. The device is also able to be combined with other MCP4431T-502E/ST devices in order to form a larger digitally adjustable gain network.The MCP4431T-502E/ST consists of two series-connected resistors and a single gang digital potentiometer movement. The resistance value is set by setting the wiper position between the two resistors. The device can be used in a variety of applications, including control and feedback voltage applications, gain setting of filter circuits, constant current source applications, bias circuit applications and audio applications.The working principle of the MCP4431T-502E/ST is quite simple. Single bits shift out of the device by the SPI bus, when hold mode is enabled. When hold mode is disabled, each bit shift is followed by a digital potentiometer write cycle, which moves the wiper position from the current state up or down. Through the integration of the on-board 16-bit Eeprom, users are able to save the settings.In terms of data acquisition applications, the MCP4431T-502E/ST can be used to adjust the gain of a voltage or current control loop in order to ensure precision output. The device also can be used to linearize resistive inputs in order to reduce errors, such as gain and offset errors. It is also able to be used to program bias adjustments of an amplifier. In addition, the device can be used in audio applications, such as volume, gain, impedance and frequency equalization control, as well as in filter circuits for gain setting.In conclusion, the MCP4431T-502E/ST has a wide range of applications in data acquisition. It can be used for gain, linearizing, programming and biasing applications, as well as audio applications. The device features a dual-channel SPI interface and an onboard 16-bit EEPROM, allowing users to easily set and maintain the wiper settings as well as configure the device. The MCP4431T-502E/ST also has the ability to combine with other MCP4431T-502E/ST devices to form larger digitally adjustable gain networks.

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