DS1844-010

Digital Potentiometers Overview

The DS1844-010 is a quad digital potentiometer IC from Analog Devices/Maxim Integrated, featuring four independent 64-position linear potentiometers with a standard resistance of 10 kΩ. It operates on a supply voltage of 2.7V to 5.5V and supports industrial temperatures from -40°C to +85°C. The device offers two interface options: a 5-wire serial port or a 2-wire addressable I²C-compatible bus. As a volatile component, it powers up with wipers at the mid-tap position (32). Each potentiometer utilizes an 8-bit register for control, where the lower 6 bits define the wiper position.

Digital Potentiometers Feature Summary

• Quad configuration with four independent 64-position linear potentiometers
• Dual interface support: 5-wire serial shift register or 2-wire addressable bus
• Standard 10 kΩ end-to-end resistance with ±20% tolerance
• Volatile memory architecture with mid-tap power-up state

Digital Potentiometers Applications

• Multi-channel volume or gain control in audio systems
• Programmable voltage reference adjustment
• Calibration of sensor signal conditioning circuits
• Variable resistor replacement in test and measurement equipment

Digital Potentiometers Procurement Notes

Verify package availability as the datasheet lists 20-pin DIP, SOIC, and TSSOP options. Confirm interface requirements; the PS pin determines between 5-wire and 2-wire modes. Ensure system logic levels match the 2.7V–5.5V operating range. Check for obsolescence status as older Maxim parts may have limited lifecycle support.

Digital Potentiometers Selection Notes

Select the DS1844-010 specifically for 10 kΩ applications; other variants like DS1844-050 or DS1844-100 offer different resistance values. Note that this is a volatile device; if non-volatile storage is required, consider the DS1844E series. Verify that the 64-position resolution meets the application's precision needs compared to higher-resolution alternatives.

Digital Potentiometers Part Context

The DS1844 belongs to the Maxim Integrated digital potentiometer family. It serves as a digitally controlled alternative to mechanical potentiometers, allowing remote adjustment via serial interfaces. The '010' suffix denotes the 10 kΩ resistance value within the DS1844 product line.

Digital Potentiometers Replacement Considerations

For non-volatile functionality, the DS1844E-xxx series is the direct upgrade. For single-channel applications, the DS1804U may be suitable. For quad channels with different interface requirements, the AD5292 series offers higher resolution but different pinouts.

Digital Potentiometers FAQ

What is the default wiper position upon power-up?

The DS1844 is a volatile device that always powers up with all wiper positions set to the mid-tap, which corresponds to decimal position 32.

How is the serial interface mode selected?

The Port Select (PS) input pin determines the mode. A low state on PS selects the 5-wire serial interface, while a high state selects the 2-wire addressable interface.

What is the maximum clock frequency for the 5-wire interface?

The maximum clock frequency for the 5-wire serial interface (CLK) is 5 MHz.