DS1050Z-25

Overview

The DS1050Z-25 is a programmable, 5-bit pulse-width modulator (PWM) from Analog Devices Inc./Maxim Integrated. It operates on a single power supply ranging from 2.7V to 5.5V and features a standard output frequency of 25kHz. The device includes a 2-wire addressable serial interface for communication. Key electrical parameters include an active supply current of 50µA and a standby current of 1µA. It supports duty cycles from 0% to 96.88% in 3.125% steps, with a command for 100% full-on operation. The component is housed in an 8-pin SOIC package.

Feature Summary

• Single 5-bit programmable PWM with adjustable duty cycle from 0% to 100%
• Standard 25kHz 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 shutdown current

Applications

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

Procurement Notes

Verify the specific suffix 'Z' indicates lead-free compliance when sourcing. Confirm the package variant matches the required footprint, as the DS1050 series also offers an 8-pin µSOP option. Ensure the master controller supports the 2-wire protocol timing requirements for both standard and fast modes.

Selection Notes

Select this model for applications requiring a fixed 25kHz PWM frequency. Choose between the 8-pin SOIC and µSOP packages based on board space constraints. Ensure the system voltage stays within the 2.7V to 5.5V range. Consider the ±20% frequency tolerance if precise timing is critical.

Part Context

The DS1050Z-25 belongs to the DS1050 family of programmable PWMs. Other variants in the series offer different standard frequencies, including 1kHz, 5kHz, and 10kHz. The 'Z' suffix typically denotes lead-free packaging compliant with RoHS standards.

Replacement Considerations

Direct replacements within the same family include DS1050Z-001, DS1050Z-005, and DS1050Z-010 for different frequency requirements. The DS1050U series offers the same functionality in an 8-pin µSOP package instead of SOIC.