DS1803Z-050

Digital Potentiometers Overview

The DS1803Z-050 is an addressable dual digital potentiometer featuring two independently controlled 256-position resistive arrays. It operates on a 2.7V to 5.5V supply with a typical active current of 200µA and standby current of 40µA. The device utilizes a 2-wire serial interface (SDA/SCL) for communication, allowing up to eight units to share the bus via three address inputs (A0-A2). Each potentiometer offers a total resistance of 50kΩ with a temperature coefficient of 750ppm/°C and ±20% tolerance. The wiper position is volatile and resets to the low-end terminal upon power-up.

Digital Potentiometers Feature Summary

• Dual 256-position digitally controlled potentiometers with 50kΩ end-to-end resistance
• Addressable 2-wire serial interface supporting up to 8 devices on a single bus
• Industrial operating temperature range from -40°C to +85°C
• Available in 16-pin SOIC surface-mount packaging

Digital Potentiometers Applications

• Volume control in audio equipment
• Gain adjustment in signal conditioning circuits
• System calibration and trimmer replacement
• Voltage reference adjustment

Digital Potentiometers Procurement Notes

Verify the specific package variant, as the DS1803 series includes DIP, TSSOP, and SOIC options. Confirm lead-free status if required, indicated by the '+' suffix in ordering numbers. Check for tape-and-reel availability if automated assembly is needed. Ensure the voltage supply matches the 2.7V–5.5V specification. Validate that the volatile memory characteristic aligns with system power-loss requirements.

Digital Potentiometers Selection Notes

Select this model for applications requiring dual independent resistance control via a serial interface. The 50kΩ value suits moderate impedance circuits; use DS1803-010 for lower impedance or DS1803-100 for higher impedance needs. The SOIC package is suitable for surface-mount designs. Note that the device lacks non-volatile storage, so wiper positions must be re-established after power cycles. The 2-wire interface requires compatible master logic levels.

Digital Potentiometers Part Context

The DS1803Z-050 belongs to the DS1803 family of addressable digital potentiometers. It shares core functionality with the DS1803E (TSSOP) and DS18030 (DIP) variants, differing primarily in package type. The 'Z' suffix denotes the 16-pin SOIC package. This component serves as a solid-state alternative to mechanical potentiometers in systems requiring remote digital adjustment.

Digital Potentiometers Replacement Considerations

Direct pin-compatible replacements include other DS1803 variants with different resistance values (DS1803Z-010, DS1803Z-100) or packages (DS1803E-050, DS18030-050). Cross-family substitutes like the DS1804 offer single-potentiometer configurations with non-volatile memory but differ in interface and pinout.