DS1052U-100+

Overview

The DS1052U-100+ is a programmable, 5-bit pulse-width modulator (PWM) from Analog Devices Inc./Maxim Integrated. It features a standard output frequency of 100kHz and operates on a single supply voltage ranging from 2.7V to 5.5V. The device utilizes a 2-wire addressable serial interface for control, allowing multiple units to share a bus. It provides an adjustable duty cycle from 0% to 100% with 5-bit resolution. The component is housed in an 8-pin uMAX/uSOP package and supports an operating temperature range of -40°C to +85°C.

Feature Summary

• Single 5-bit programmable PWM with adjustable duty cycle from 0% to 100%
• Standard 100kHz output frequency
• 2-Wire addressable serial interface compatible with standard and fast modes
• Low power consumption: 100µA active current, 1µA shutdown current

Applications

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

Procurement Notes

Verify the specific suffix U-100 corresponds to the 8-pin 118-mil uSOP package and 100kHz frequency variant. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the design accounts for the open-drain nature of the SDA and SCL lines requiring external pull-up resistors.

Selection Notes

Select this component when a low-cost, software-configurable PWM source is required for analog control applications. The 5-bit resolution offers 32 discrete steps, suitable for coarse adjustments. Consider the 2-wire interface compatibility if integrating with other Dallas Semiconductor/Maxim devices like RTCs or digital potentiometers on the same bus.

Part Context

The DS1052 belongs to the family of programmable pulse-width modulators designed for simple, cost-effective control tasks. The 'U' designation indicates the space-saving 8-pin micro-small outline package, while '-100' specifies the 100kHz standard frequency option. It serves as a direct replacement for fixed-frequency PWM circuits in consumer electronics.

Replacement Considerations

Direct substitutes include the DS1052Z-100, which shares identical electrical specifications but utilizes an 8-pin SOIC package instead of the uSOP form factor. Designers must verify pinout compatibility and footprint dimensions when swapping between these package variants.