A4983SETTR-T

Overview

The A4983SETTR-T is a DMOS microstepping driver with translator, designed for bipolar stepper motors. It operates within an 8 V to 35 V supply range and delivers up to 2 A output current. The device supports full, half, quarter, eighth, and sixteenth step resolutions. It features a fixed off-time current regulator with automatic decay mode selection. The component is housed in a 28-lead QFN package (5x5 mm) suitable for surface mount installation.

Feature Summary

• Integrated translator allows operation via simple step and direction signals without requiring a microprocessor.
• Automatic current decay mode detection selects between slow and mixed decay modes for optimal performance.
• Built-in protection mechanisms include thermal shutdown, cross-current protection, and short-circuit safeguards.

Applications

• Bipolar stepper motor control systems
• Motion control applications requiring microstepping
• Industrial automation equipment

Procurement Notes

Verify the specific suffix 'SETTR' confirms the tape and reel packaging format. Confirm the QFN-28 package dimensions match your PCB footprint requirements. Ensure the operating temperature range of -20°C to +85°C aligns with your environmental specifications. Check for humidity sensitivity classification if moisture-prone assembly processes are used.

Selection Notes

Select this component when a complete microstepping solution with integrated logic is required. It is suitable for designs needing simplified interface control via step/dir inputs. Consider the 2 A current capability and 35 V voltage rating for appropriate motor loads. Evaluate thermal management needs due to the power dissipation characteristics of the DMOS technology in the QFN package.

Part Context

This part belongs to the Allegro A49xx family of stepper motor drivers. It shares functional similarities with other models in the series but offers specific pinout and feature configurations. The A4983 variant includes a built-in translator, distinguishing it from basic drivers that require external logic for microstepping sequencing.

Replacement Considerations

The A4988SETTR-T is a documented substitute within the same product family. Verify compatibility regarding pin assignments and feature sets before substitution. Both components share similar electrical ratings and package types.