DS1050U-005+

Overview

The DS1050U-005+ is a 5-bit programmable pulse-width modulator (PWM) from Analog Devices/Maxim Integrated, operating within a 2.7V to 5.5V supply range. It provides a fixed output frequency of 5kHz with adjustable duty cycles ranging from 0% to 96.88%, or 100% via a specific command. The device features a 2-wire addressable serial interface for communication and control. It consumes a typical active supply current of 50µA and supports a low-current shutdown mode drawing less than 1µA. The component is housed in an 8-pin µSOP package and operates across a temperature range of -40°C to +85°C.

Feature Summary

• 5-bit PWM resolution with duty cycle adjustment from 0% to 96.88% in 3.125% steps
• Fixed 5kHz output frequency with ±20% tolerance
• 2-wire addressable serial interface supporting standard (100kHz) and fast (400kHz) modes
• Low power consumption: 50µA active current and <1µA standby current

Applications

• LCD contrast and brightness control
• Power supply voltage adjustment
• Battery charging or current adjustment

Procurement Notes

Verify the ordering suffix 'U' corresponds to the 8-pin 118-mil µSOP package as specified in the datasheet. Confirm the '-005' suffix indicates the 5kHz frequency variant. Ensure compatibility with the 2.7V to 5.5V operating voltage range required by the application circuit.

Selection Notes

Select this model when a 5kHz PWM signal is required in a space-constrained design utilizing the µSOP package. Compare against the DS1050Z series if a larger 150-mil SOIC package is preferred. Consider the 2-wire interface requirements and address pin configurations (A0-A2) for multi-device bus systems.

Part Context

The DS1050U-005+ belongs to the DS1050 family of 5-bit programmable PWMs. It shares functional similarities with variants like the DS1050Z-005+ but differs in physical packaging. The 'U' suffix specifically denotes the compact 8-pin µSOP form factor, distinguishing it from the standard SOIC options available in the same product line.

Replacement Considerations

Direct replacements include other DS1050 family members such as the DS1050Z-005+ for identical functionality in a different package. Verify pinout compatibility between µSOP and SOIC packages during substitution.