DS4303R-U+

Overview

The DS4303R-U+ is a nonvolatile electronically programmable voltage reference manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single supply voltage ranging from 2.4V to 3.6V with a typical supply current of 1.6mA. The output voltage is adjustable within the range of 0.3V to VCC-0.3V, featuring a tracking accuracy of ±20mV and quantization steps of ±1mV. The device provides ±1mA of output-current drive and includes output short-circuit protection. It utilizes an internal EEPROM to store the programmed voltage indefinitely, even after power cycling.

Feature Summary

• Nonvolatile memory stores the voltage level indefinitely without requiring external components
• Enables automated factory trimming through simple in-circuit adjustment procedures
• Provides low temperature coefficient for stable performance across operating ranges
• Includes output short-circuit protection and low power consumption characteristics

Applications

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

Procurement Notes

Verify the specific suffix 'U+' indicates lead-free packaging compliance when sourcing this component. Confirm the package type matches the required SOT-23-5 footprint for your PCB layout. Ensure the ordering information aligns with the manufacturer's current production status and availability constraints. Cross-reference the datasheet revision to confirm electrical characteristics match your design requirements.

Selection Notes

Select this component when precise, field-adjustable voltage references are required for manufacturing calibration processes. It serves as a direct replacement for cumbersome factory adjustment arrangements involving discrete resistors or mechanical pots. Consider its small 5-lead SOT23 package for space-constrained designs. Evaluate its ability to be adjusted after assembly to reduce inventory costs and improve time-to-market flexibility.

Part Context

The DS4303 series belongs to Maxim Integrated's portfolio of precision analog components designed for embedded systems. It replaces traditional shunt voltage references and hand-selected resistor networks. The device integrates a 12-bit DAC and EEPROM to achieve high precision. Its primary value proposition lies in enabling automated alignment techniques during production testing.

Replacement Considerations

DS4303R+T&R