MCP4651T-103E/ST

Memory Type:	Volatile
Base Part Number:	MCP4651
Supplier Device Package:	14-TSSOP
Package / Case:	14-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:	Mute, Selectable Address
Voltage - Supply:	1.8 V ~ 5.5 V
Series:	--
Interface:	I²C
Resistance (Ohms):	10k
Number of Taps:	257
Number of Circuits:	2
Configuration:	Potentiometer
Taper:	Linear
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The MCP4651T-103E/ST is a digital potentiometer, which is a type of data acquisition device. Its main use is to measure and control the state of an analog signal, from a range of 0 to full scale. It is a 20-position variable-resistance device that can be programmed in real-time using the SPI (Serial Peripheral Interface) or I2C communication interface.This digital potentiometer has a wide range of applications in the field of data acquisition. It is used in applications in the industrial, consumer, and entertainment industries, such as motors, audio systems, lighting systems, and even displays. It can also be used as a substitute for traditional resistive components, allowing for the implementation of digital control, or the implementation of a measurement system.

Design

The MCP4651T-103E/ST digital potentiometer has two terminations, one called the "Enable" terminal and the other the "Sense" terminal. The Enable terminal is used to control the resistance\'s value, and the Sense terminal is used to measure the voltage applied to the device.The Enable terminal is connected to the Digital Logic Control (DLC) line, and the Sense terminal is connected to the Analog Voltage Input (AVI) line. The DLC line is used to connect the digital logic control signals of the chip to the upper resistor terminals, and the AVI line is used to connect the analog voltage input signals to the lower resistor terminals.The MCP4651T-103E/ST incorporates a resistor network of 20 steps which can be used to change the resistance value, in one-step increments. The digital potentiometer also has an on-chip oscillator, which can be used to control the timing of the resistance changes, and to ensure stability and reliability of the digital potentiometer.

Operation

The MCP4651T-103E/ST digital potentiometer has two communication interface, which are the SPI (Serial Peripheral Interface) and the I2C bus. The SPI interface can be used to configure the devices, while the I2C bus is used to read and write data to and from the devices.When using SPI, the user can configure the various registers associated with the device, such as the resistance value, control register, voltage read control register, and the oscillator control register. The I2C bus can be used for data read and write operations.For programming the resistance, the user can write the associated values to the control register, and the resistant value will be changed according to the value written. For reading the voltage, the user can write the associated values to the voltage read control register, and the voltage will be read from the Sense terminal.ConclusionThe MCP4651T-103E/ST is a digital potentiometer, which is a type of data acquisition device. It has a wide range of applications in the field of data acquisition and is used in industrial, consumer, and entertainment applications. It incorporates a resistor network of 20 steps and has two communication interfaces, SPI and I2C, which can be used to configure the device and read and write data.

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