MCP4151-503E/P

Memory Type:	Volatile
Base Part Number:	MCP4151
Supplier Device Package:	8-PDIP
Package / Case:	8-DIP (0.300", 7.62mm)
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:	--
Interface:	SPI
Resistance (Ohms):	50k
Number of Taps:	257
Number of Circuits:	1
Configuration:	Potentiometer
Taper:	Linear
Part Status:	Active
Packaging:	Tube

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Data Acquisition - Digital Potentiometers

Digital potentiometers are used in a wide range of applications, from consumer electronics and automotive systems, to industrial measurement and automation. The MCP4151-503E/P is a single-channel, digital potentiometer in a 4-pin container package, designed to provide a wide range of adjustment values and control options that can be accessed via the two-wire interface. This article provides an overview of the MCP4151-503E/P application field and working principle.

Application Field of MCP4151-503E/P

The MCP4151-503E/P is typically used in end-user applications such as remote control units, audio systems, digital camera modules, television displays, and industrial control systems and testing equipment. It is also used in medical devices, robotic systems, and power management systems.

Working Principle of MCP4151-503E/P

The MCP4151-503E/P is a single-channel, 10 turn, digital potentiometer (DPOT) produced by Microchip Technology. It is designed to provide a wide range of adjustment values and control options to an external device or system. The device consists of a set of resistive elements configured in an adjustable voltage divider that is controlled by an internal digital-to-analog converter (DAC). The device can be programmed to output a voltage between 0 and 10V, with 10 possible settings (resistor settings 0 through 100).The device is controlled via a two-wire interface that consists of a clock (SCK) and a data (SDI) input line. The host driver will provide all the needed signals to program the position of the wiper and configure other device settings such as power-down mode.The clock input (SCK) is used to synchronize the transfer of data into and out of the device, while the data line (SDI) is used to input new data values or retrieve the current setting value. To program the device, a valid data byte (from 0 to 0xFF) is clocked into the device on the SDI line following the SCK. Each input byte is then incrementally transferred to the internal DAC and the voltage divider ratio is adjusted accordingly. The device always works in the reset position unless a valid data byte is received, in which case the adjustment will occur instantaneously.The device also features an internal power-down option that can be configured via the two-wire interface. This power-down mode reduces current draw from the device to an extremely low level (1µA typical) and is used to reduce power consumption of the device.

Conclusion

The MCP4151-503E/P is a versatile and flexible digital potentiometer with a range of applications in many different fields. Its two-wire interface and adjustable resistance output make it an ideal solution for controlling external devices or systems.

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