LT1019ACH-2.5

Voltage Reference Overview

The LT1019ACH-2.5 is a precision voltage reference utilizing thin film technology and curvature correction, offering an output of 2.5V with 0.05% initial accuracy and 5ppm/°C temperature coefficient. It operates in series or shunt modes, sourcing and sinking up to 10mA. Key electrical parameters include line regulation of 0.5ppm/V typical, ripple rejection of 90dB minimum, and quiescent current ranging from 0.65mA to 1.3mA. The device functions within a commercial temperature range of 0°C to 70°C and is housed in an 8-lead SOIC package.

Voltage Reference Feature Summary

• Third-generation bandgap design with wafer-level trimming for low drift and tight tolerance
• Capable of both sourcing and sinking up to 10mA without external components
• Features ultrahigh line rejection and low output impedance
• Includes a temperature output pin proportional to absolute temperature

Voltage Reference Applications

• A/D and D/A converters
• Precision regulators
• Constant current sources
• Bridge excitation circuits

Voltage Reference Procurement Notes

Verify the specific suffix 'ACH' corresponds to the 2.5V output, 0.05% accuracy, 5ppm/°C drift, and commercial temperature range (0°C to 70°C) in an 8-lead SOIC package. Confirm RoHS compliance status as manufacturing processes may evolve. Ensure the ordering number matches the exact package style required for your PCB layout.

Voltage Reference Selection Notes

Select this component when high stability and low drift are critical for analog signal chains. The 2.5V output suits single-supply systems requiring a stable mid-rail or ground reference. Consider the thermal regulation specification if significant power dissipation changes are expected in the application environment.

Voltage Reference Part Context

This part belongs to the LT1019 family of precision references, which serves as a direct replacement for older bandgap standards like the AD580 and LM168. The LT1019 series provides improved curvature correction compared to previous generations, ensuring superior performance across varying load and line conditions.

Voltage Reference Replacement Considerations

LT1019ACN8-2.5 (PDIP-8 variant)

Voltage Reference FAQ

How does the LT1019 handle negative output voltages?

The LT1019 can operate in shunt mode to provide negative output voltages without requiring external components.

What is the function of the TEMP pin?

The TEMP pin provides a voltage directly proportional to absolute temperature (PTAT) with a slope of approximately 2.1mV/°C, suitable for measuring relative temperature changes.