ST42ETB105

Series:	ST42
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Resistance:	1 MOhms
Power (Watts):	0.25W, 1/4W
Tolerance:	±20%
Temperature Coefficient:	±100ppm/°C
Number of Turns:	1
Adjustment Type:	Top Adjustment
Resistive Material:	Cermet
Mounting Type:	Surface Mount
Termination Style:	Gull Wing
Size / Dimension:	Square - 0.197" L x 0.177" W x 0.091" H (5.00mm x 4.50mm x 2.30mm)

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Introduction

Trimmer potentiometers are used for fine-tuning analog electrical signals, allowing for precision adjustment of parameters such as voltage, current, and resistance. One of the most popular types of trimmers is the ST42ETB105, a minute presettable digital trimmer pot with 16-position stops, which is typically used in radio frequency (RF) tuning. In this article, we will cover the application areas of the ST42ETB105, as well as its working principle.

Application Fields

The ST42ETB105 is suitable for a variety of applications. It is most commonly used in radio frequency (RF) equipment, where its 16-position switches allow precise tuning of frequency parameters. In addition, it can be used in audio equipment such as amplifiers, equalizers and mixers, where it is used to adjust the volume levels of individual channels.The ST42ETB105 is also used in medical devices such as pulse oximeters and ultrasound scanners, where it is used to adjust the intensity and frequency of the output signal. It is also used in car radios and other entertainment systems, where it is used to adjust the volume and balance settings.

Working Principle

The ST42ETB105 is a digital trimmer pot with 16-position stops. It consists of a tap pad assembly made up of a printed circuit board with a stainless steel sheet on the underside, onto which are mounted sixteen resistors. As the user turns the tap, the resistors connect and disconnect from the printed circuit board, thereby changing the resistance value.The trimmer pot also contains an active component, either an analog-to-digital converter (ADC) or a digital-to-analog converter (DAC). The ADC is used to convert the analog signal from the tap pad into a digital signal, which is then sent to a microcontroller for further processing. Conversely, the DAC is used to convert the digital signal from the microcontroller into an analog signal, which can then be adjusted using the tap pad.

Conclusion

In conclusion, the ST42ETB105 is a popular trimmer pot due to its minute presettable design and 16-position stops. It is typically used in radio frequency (RF) tuning, audio equipment, medical devices, car radios, and other entertainment systems, where its adjustable resistor values are ideal for precise tuning of signals. The trimmer pot works by connecting and disconnecting resistors on its tap pad and by sending and receiving signals from an analog-to-digital or digital-to-analog converter.

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