MCP4451-503E/ML

Memory Type:	Volatile
Base Part Number:	MCP4451
Supplier Device Package:	20-QFN (4x4)
Package / Case:	20-VFQFN Exposed Pad
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):	50k
Number of Taps:	257
Number of Circuits:	4
Configuration:	Potentiometer
Taper:	Linear
Part Status:	Active
Packaging:	Tube

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Introduction MCP4451-503E/ML is a two-channel, digital potentiometer with a resolution of 8 bits per channel. It is offered in either a through-hole (T package) or surface-mount (ML package) package. It is ideal for use in data acquisition, analog signal conditioning, and digital control. MCP4451-503E/ML provides one of the easiest and most cost-effective ways to achieve higher channel count data acquisition, as well as automate dynamic control functions.Application Field MCP4451-503E/ML is suitable for a wide range of data acquisition applications, including low-level signal conditioning and automatic control, such as temperature and pressure control. The user can program any number of steps in either the precise position steps or in the precise voltage step. This can be used to adjust a precise voltage setting and reduce time spent by the user when adjusting a single potentiometer.The MCP4451-503E/ML is also applicable for low-level signal conditioning in medical devices, motion control, and any application that requires precise, digital feedback and control.Working Principle MCP4451-503E/ML digital potentiometers are based on the same central operating principle as other digital potentiometers, namely, two identical, linear resistors separated by a wiper, which is controlled by a digitally addressable electronic switch.When power is applied to the two resistors, the output of the device will be the amount of current that is able to flow through the resistors. This output current is proportional to the digital input to the resistor, as the output current is a function of the relative resistance of the two resistors. When the digital input is changed, the output current of the device changes.The MCP4451-503E/ML is able to achieve much higher precision than traditional analog potentiometers by utilizing different internal resistors and by providing a programmable switch between them. This allows the user to set the resistor value to a much more accurate level, as it can be changed incrementally in the form of “steps”.In addition to providing variable resistor values, the MCP4451-503E/ML also allows for digital offset adjustment and storage. This feature enables the user to adjust the output voltage of the device to a specified level and then store it in a digital register for later use. The device also provides for output range selection so that the output can be set to one of two ranges. This feature eliminates the need for external resistors for range selection.Conclusion MCP4451-503E/ML digital potentiometers are a great choice for data acquisition and dynamic control applications. They offer high precision, programmable resistance and digital offset adjustment, which make them ideal for robotics, automated control systems, and medical instruments. The device also provides for output range selection and can be used in a wide variety of applications.

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