DS4305R+U

Overview

The DS4305R+U is a nonvolatile, electronically programmable shunt voltage reference in a 5-lead SOT23 package. It operates on a single supply of 4.0V to 5.5V with a maximum supply current of 2.1mA. The output voltage range spans from 0.3V up to VCC - 0.3V, allowing adjustment within 300mV of the supply rails. Key electrical characteristics include a tracking accuracy of ±20mV and a quantization step of ±1.5mV. The device features low temperature coefficients ranging from -43 to +60 ppm/°C depending on conditions, and supports ±1mA output current drive.

Feature Summary

• Nonvolatile memory stores the calibrated voltage indefinitely without power
• Enables automated factory trimming via VIN and ADJ pin control
• Provides output short-circuit protection for robust operation

Applications

• Power-supply calibration
• Threshold setting
• Offset nulling
• Bias adjusting for power amplifiers
• Pressure bridges

Procurement Notes

Verify the specific suffix 'U' indicates tube packaging when sourcing this component. Confirm that the part number corresponds to the Analog Devices / Maxim Integrated manufacturer designation. Ensure the operating temperature range requirements align with the specified -40°C to +125°C limits before procurement.

Selection Notes

Select this component when a factory-calibratable voltage reference is required to replace mechanical potentiometers or fixed resistor networks. It is suitable for applications needing post-assembly adjustment capabilities. Consider the SOT23-5 footprint constraints and the need for a stable 4.0V to 5.5V supply rail during the programming phase.

Part Context

This device belongs to the DS4305 family of electronically programmable voltage references. It serves as a modern replacement for traditional factory adjustment arrangements involving hand-selected resistors. The technology allows for lower inventory costs and quicker time-to-market by enabling precise voltage locking through automated test equipment.

Replacement Considerations

DS4305R+T&R