MCP4361T-104E/ST

Memory Type:	Non-Volatile
Base Part Number:	MCP4361
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:	--
Voltage - Supply:	1.8 V ~ 5.5 V
Series:	WiperLock™
Interface:	SPI
Resistance (Ohms):	100k
Number of Taps:	257
Number of Circuits:	4
Configuration:	Potentiometer
Taper:	Linear
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Digital potentiometers are digital devices that perform the same electrical function as mechanical potentiometers. The main difference between the digital and the mechanical devices is that the digital devices can be easily programmed by the user, whereas the mechanical potentiometers have to be changed in the hardware itself. The MCP4361T-104E/ST are digital potentiometers that are used in various application fields.The MCP4361T-104E/ST are a type of passive digital potentiometers. On the MCP4361T-104E/ST, the resistance that can be controlled is up to 10kΩ, with a total temperature range of -40°C to 125°C and a working voltage range of 2.7V to 5.5V. Moreover, the MCP4361T-104E/ST supports pull-up and pull-down resistors with various current levels.Their application field mainly concerns digital audio amplifiers, keyboards, touch screens, analog-to-digital conversion (ADC), audio crossbar switching and display brightness controls.In digital audio amplifiers, this type of digital potentiometer is used to convert digital audio signals, received from storage devices like MP3 players, computers and smartphones, into analog audio signals and amplify them.The digital potentiometer is also used to control the audio crossbar switching, which serves to route the required input signal to the selected output. Its main function is to switch the signals from several sources, such as the CD player, and the computer to the amplifier and speakers.In keyboards and touch screens, the digital potentiometer is used to adjust and control the response rate of the keys and the sensitivity of the touch screens. In this case, the digital potentiometer works as a voltage divider and it is adjusted in order to achieve the desired pressure sensitivity.In display brightness control, the digital potentiometer is used to control the voltage that the display receives, so that it can adjust the brightness. This control helps to save energy.In ADC conversion, the digital potentiometer is used to scale the input voltage before converting it to digital signal, as digital signal operates in a fixed voltage range.The MCP4361T-104E/ST also have a wide range of features, such as low power consumption, low leakage current, and a low temperature coefficient of resistance. The device has an accuracy of 0.5% and a lower temperature coefficient of resistance for more accuracy in different temperature environments. It also has a write protect feature, which prevents unintentional adjustment of the device, as well as limited cycle features to prevent the device from incrementing more than a set number of cycles.The working principle of the MCP4361T-104E/ST is relatively simple. It works as a voltage divider, where the center pin divider moves along the two ends of the resistors on the wiper side, to achieve the desired voltage on the center pin. First, the user sets the desired resistance on the device, then the user inputs an analog voltage which is then divided between the resistors.The resistance is controlled through a Simple Communication Network (SCN) bus, which is a two-wire interface. This interface allows the user to directly control the wiper from a microcontroller, and is able to employ several features such as single-ended or differential line coding schemes. The SCN bus also allows the user to read the resistance value and the position of the wiper on the device.The MCP4361T-104E/ST are an effective and efficient digital potentiometers that can be used in many application fields, such as digital audio amplifiers, keyboards, touch screens, analog-to-digital conversion, audio crossbar switching, and display brightness control. Its advantages, such as low power consumption, low leakage current and low temperature coefficient of resistance, make it ideal for these application fields.

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