DS1802S

Digital Potentiometers Overview

The DS1802S is a dual digital potentiometer IC manufactured by Analog Devices Inc./Maxim Integrated. It features two independent audio taper (logarithmic) potentiometers, each with 65 tap positions and a total resistance of 45 kOhms. The device utilizes a serial 3-wire interface for control and employs volatile memory to retain wiper settings during operation. It operates on a single power supply ranging from 2.7 V to 5.5 V. The component is housed in a surface-mount SOIC-20 package and is designed for applications requiring precise electronic volume or tone control.

Digital Potentiometers Feature Summary

• Dual channel configuration with logarithmic taper characteristics suitable for audio applications
• 65 discrete tap positions per potentiometer providing fine resolution control
• Serial 3-wire interface for simplified microcontroller connectivity
• Operates within a wide voltage range of 2.7 V to 5.5 V

Digital Potentiometers Applications

• Electronic volume control circuits
• Audio tone adjustment systems
• Programmable gain amplifiers
• Battery-powered audio devices due to low voltage operation

Digital Potentiometers Procurement Notes

Verify the specific suffix 'S' indicates the SOIC-20 surface mount package variant. Confirm RoHS compliance status as legacy Maxim products may have non-compliant variants. Check for obsolescence notices from Analog Devices, as this component series has been subject to discontinuation notifications. Ensure the design accounts for volatile memory behavior upon power loss.

Digital Potentiometers Selection Notes

Select the DS1802S when dual independent logarithmic control is required. Compare against the DS1802 if through-hole packaging is preferred. Verify that the 45 kOhm resistance value aligns with the target circuit impedance. Consider the 750 PPM/C temperature coefficient for thermal stability requirements in precision audio paths.

Digital Potentiometers Part Context

The DS1802S belongs to the DS1802 family of dual digital potentiometers. It shares core specifications with the standard DS1802 but differs in packaging, utilizing an SOIC-20 form factor instead of the PDIP-20. This family is characterized by pushbutton compatibility and silent switching capabilities for audio integrity.

Digital Potentiometers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult Analog Devices for current equivalent components or assess pin-compatible alternatives from other manufacturers if the DS1802S is discontinued.