DS1844E-100/T&R

Digital Potentiometers Overview

The DS1844E-100/T&R is a quad digital potentiometer IC from Analog Devices/Maxim Integrated, featuring four independent 64-position linear potentiometers with a nominal resistance of 10 kΩ. It operates on a single supply voltage ranging from 2.7 V to 5.5 V and supports industrial temperatures from -40°C to +85°C. The device offers dual interface options: a 5-wire serial port and a 2-wire addressable I²C-compatible bus. Each wiper position is controlled via an 8-bit register, allowing for precise analog signal adjustment in embedded systems.

Digital Potentiometers Feature Summary

• Quad configuration with four independent 64-position linear potentiometers
• Dual interface support: 5-wire serial and 2-wire addressable (I²C)
• Volatile memory architecture; power-up defaults to mid-tap (position 32)
• Industrial temperature range operation (-40°C to +85°C)

Digital Potentiometers Applications

• Programmable gain amplifiers and variable attenuators
• Digital volume control in audio circuits
• Calibration of sensor signals and instrumentation
• Adjustable reference voltages and biasing networks

Digital Potentiometers Procurement Notes

Verify the 'T&R' suffix indicates tape-and-reel packaging rather than tube. Confirm the 'E' designation aligns with current manufacturing specifications. Check for lead-free compliance status as historical data varies. Ensure the 10 kΩ resistance value matches circuit requirements. Validate that the volatile nature of the device suits the application's power-loss behavior expectations.

Digital Potentiometers Selection Notes

Select this component when four independent digital pots are required in a single package. Choose the 10 kΩ variant if the circuit impedance matches this value. Consider the 2-wire interface for space-constrained designs using standard I²C buses. Verify that the 64-step resolution meets the required precision. Note that the device lacks non-volatile storage, requiring state restoration upon power cycling.

Digital Potentiometers Part Context

This part belongs to the DS1844 family of quad digital potentiometers. Other variants include different resistance values such as 50 kΩ and 100 kΩ. The 'E' suffix typically denotes specific manufacturing or environmental grades within the Maxim Integrated portfolio. The T&R suffix specifies the reel packaging format for automated assembly.

Digital Potentiometers Replacement Considerations

Direct pin-to-pin replacements may include other DS1844 variants with different resistance values. Cross-reference with DS1844-050 or DS1844-100 if resistance scaling is acceptable. Verify interface compatibility if substituting with similar quad digital potentiometers from other manufacturers.