DS1050Z-025+T&R

Overview

The DS1050Z-025+T&R is a programmable, 5-bit pulse-width modulator (PWM) from Analog Devices/Maxim Integrated. It features a standard output frequency of 25 kHz and operates on a single supply voltage ranging from 2.7 V to 5.5 V. The device utilizes a 2-wire addressable serial interface for control, allowing duty cycle adjustments from 0% to 100%. It draws a typical active supply current of 50 µA and supports a low-current shutdown mode with standby current below 1 µA. The component is housed in an 8-pin SOIC package and functions within an industrial temperature range of -40°C to +85°C.

Feature Summary

• Single 5-bit PWM with adjustable duty cycle from 0% to 100%
• Standard 25 kHz output frequency
• 2-wire addressable serial interface supporting up to eight devices
• Low power consumption: 50 µA active, <1 µA standby

Applications

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

Procurement Notes

Verify the specific suffix '+T&R' indicates tape-and-reel packaging when sourcing. Confirm the 'Z' designation aligns with lead-free compliance requirements for the target assembly process. Ensure the master controller supports the required 2-wire protocol timing for standard or fast modes.

Selection Notes

Select this part for applications requiring a fixed 25 kHz PWM frequency. Choose alternative suffixes (e.g., -001, -005, -010) if different standard frequencies are needed. Consider the 8-pin SOIC package constraints for PCB layout. Verify that the system bus speed matches the device's support for both standard (100 kHz) and fast (400 kHz) modes.

Part Context

This component belongs to the DS1050 family of programmable pulse-width modulators. The 'Z' suffix typically denotes lead-free packaging compliant with RoHS standards. The '-025' identifier specifies the internal oscillator calibration for a nominal 25 kHz output frequency. The '+T&R' suffix indicates the unit is supplied in a tape-and-reel format suitable for automated surface-mount assembly.

Replacement Considerations

Direct replacements within the same series include DS1050Z-001+T&R, DS1050Z-005+T&R, and DS1050Z-010+T&R for different frequency requirements. For space-constrained designs, the DS1050U-025 variant offers the same electrical specifications in an 8-pin µSOP package.