MCP4661T-104E/ST

Memory Type:	Non-Volatile
Base Part Number:	MCP4661
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):	100k
Number of Taps:	257
Number of Circuits:	2
Configuration:	Potentiometer
Taper:	Linear
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Digital potentiometers are used to provide adjustable voltage dividers in circuits where the total resistance of the divider needs to be adjusted. The potentiometers can provide an accurate resistance adjustment within an electrical circuit as compared to traditional mechanical potentiometers. MCP4661T-104E/ST is an example of a digital potentiometer, manufactured by Microchip Technology Inc.

Application Fields

The MCP4661T-104E/ST digital potentiometer is a single-channel, 32-taps (31 positions), low voltage, low-power CMOS device that can be used in various fields. It is suitable for digital control of a potentiometer need in smaller, space-constrained designsIn applications such as data acquisition and test equipment, digital potentiometers are used to provide variable attenuation of signals. The MCP4661T-104E/ST digital potentiometer provides precise digital control over the attenuation level and can be used in industrial, consumer, and medical audio and video applications.Digital potentiometers can also be used for motor control applications to provide precise control over motor speed. The MCP4661T-104E/ST digital potentiometer is suitable for precise control over the voltage used to drive a DC motor, allowing precise control over the motor speed.

Working Principle

The MCP4661T-104E/St digital potentiometer have five pins, the middle pin is the wiper terminal and the other two are end terminals. The voltage at the output of this device is proportional to the resistance between the wiper and one of the end terminals. It has three control pins - SEL0, SEL1 and CS – that allow the output voltage to be set digitally. The SEL0 and SEL1 pins are used to select the end terminal to which the wiper will be connected when the CS pin is asserted. Depending on the state of the SEL0 and SEL1 pins, either terminal A (SEL0, SEL1 = 0, 0) or terminal B (SEL0, SEL1 = 0, 1) will be selected as the wiper terminal for the potentiometer. To set the output voltage, the CS pin is asserted, and the digital code stored in the inputs is used to set the resistance between the wiper and the selected terminal.The MCP4661T-104E/ST digital potentiometer also has two other control pins - UP and DOWN. These pins, when asserted, increment or decrement the wiper position, respectively, allowing the output voltage to be controlled in a granular fashion.

Conclusion

The MCP4661T-104E/ST digital potentiometer can be used in many applications due to its low voltage, low power CMOS device and its precise digital control. It is suitable for use in smaller, space-constrained designs and can provide adjustable voltage dividers in various circuits. The UP and DOWN control pins allow precise digital control over the voltage dividers, and the SEL0, SEL1 and CS pins allow the output voltage to be set digitally with a higher degree of accuracy.

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