DS1844-050

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Data Acquisition - Digital Potentiometers have been a popular choice for engineers for decades. Digital potentiometers (DPot) are a type of variable resistor typically used for setting accurate analog circuit parameters. The DS1844-050 is a member of the DS1844 family of Digital Potentiometers (DPOTs) from Dallas Semiconductor. It is a low-power, surface-mount dual-channel digital potentiometers with a wide range of adjustable resistor values. This article will discuss the DS1844-050 application field and working principle.

Applications

The DS1844-050 is ideal for precision applications due to its 10-bit resolution and excellent tracking linearity of 4%. It is suitable for low-power and portable applications requiring flexible control, such as volume and tone control. The device is available in a small 8-pin SOIC package, making it well suited to PCB layout requirements. It also features double-protected pins that provide ESD protection up to ±20kV.

The DS1844-050 is particularly well-suited for power saving applications that require very low static power consumption. It only uses 13mW of static power and 28mW of dynamic power when operating at a 3.3V supply. Additionally, the DS1844-050 has been designed to integrate seamlessly with the DS1846, a multi-channel digital potentiometer, allowing multiple devices to be used together for complex applications.

Working Principle

The DS1844-050 works as a 3-wire, 2-channel potentiometer. Each channel can be set to one of 1024 discreet values, which equates to 10-bit resolution. The device is programmed by inputting an 8-bit command code to the device\'s control input. The device can be operated in either the linear or non-linear mode. In the linear mode, both channels will change their resistance in linear relationship to each other, while in the non-linear mode the output of channel 1 will remain fixed while the output of channel 2 changes.

The DS1844-050 is a dual-channel device that can provide up to +/-5% tracking linearity, making it ideal for precision applications. It also features double-protected pins that provide ESD protection up to ±20kV, ensuring reliability. Additionally, the device is designed to provide excellent power-saving features, including low static and dynamic power consumption.

Conclusion

The DS1844-050 is a member of the Digital Potentiometer (DPOT) family from Dallas Semiconductor. It is a low-power, surface-mount dual-channel digital potentiometer with 10-bit resolution, providing up to +/-5% tracking linearity. The device also features double-protected pins that provide ESD protection up to ±20kV, making it suitable for precision applications that require very low static and dynamic power consumption. Additionally, it has been designed to integrate seamlessly with the DS1846 multi-channel digital potentiometer, allowing multiple devices to be used together. In conclusion, the DS1844-050 is an ideal choice for engineers seeking a high-precision, low-power digital potentiometer.

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