DS1803Z-100

Digital Potentiometers Overview

The DS1803Z-100 is an addressable dual digital potentiometer featuring two independently controlled 256-position wipers. It operates on a single supply voltage ranging from 2.7V to 5.5V with a typical active current of 200µA. The device utilizes a 2-wire serial interface (SDA/SCL) and includes three address inputs (A0-A2) for bus multiplexing. Total resistance is 100kΩ with a ±20% tolerance and a temperature coefficient of 750ppm/°C. It is housed in a 16-pin SOIC package and functions within an industrial temperature range of -40°C to +85°C.

Digital Potentiometers Feature Summary

• Dual 256-position potentiometers with volatile memory
• 2-wire serial interface with hardware address selection
• 100kΩ total resistance with linear taper
• Industrial operating temperature range (-40°C to +85°C)

Digital Potentiometers Applications

• Multi-channel volume or gain control systems
• Programmable voltage reference adjustment
• Sensor calibration and offset trimming

Digital Potentiometers Procurement Notes

Verify the specific ordering suffix (+, T&R) against the datasheet table to confirm lead-free status and tape-and-reel packaging requirements. Confirm that the 16L SOIC package dimensions match the target PCB footprint. Ensure the design accounts for the volatile nature of the wiper positions, which reset to zero upon power loss.

Digital Potentiometers Selection Notes

Select this component when two isolated digital potentiometers are required on a shared serial bus. The 100kΩ value suits high-impedance signal paths. Note that the DS1803 is volatile; use non-volatile variants like the DS1809 if power-down retention is necessary. Verify that the master controller supports the required SCL clock frequencies up to 400kHz.

Digital Potentiometers Part Context

The DS1803Z-100 belongs to the DS1803 family of addressable digital potentiometers. The 'Z' suffix denotes the 16-pin SOIC package, while '-100' specifies the 100kΩ resistance value. This part allows multiple devices to share a single microcontroller interface via hardware address pins A0, A1, and A2.

Digital Potentiometers Replacement Considerations

Direct pin-compatible replacements include other DS1803 variants with different resistance values (DS1803Z-010, DS1803Z-050). For non-volatile operation, consider the DS1809 series, though interface and pinout differences may require schematic changes.

Digital Potentiometers FAQ

Does the DS1803 retain wiper position after power loss?

No, the DS1803 is a volatile device. Upon power-up, both wipers default to position 00h (low-end terminals).

How many DS1803 devices can share one serial bus?

Up to eight devices can share the same 2-wire interface using the three hardware address inputs (A0, A1, A2).

What is the maximum input signal level?

Maximum input signal levels across the potentiometer cannot exceed the operating power supply voltage (VCC).