LT1009CPWE4

Voltage Reference Overview

The LT1009CPWE4 is a precision shunt voltage reference integrated circuit manufactured by Texas Instruments. It provides a fixed nominal output voltage of 2.5 V with an initial accuracy of ±0.2%. The device operates within a temperature range of -40°C to +85°C and features a low temperature coefficient of 25 PPM/°C. It supports a maximum shunt current of 10 mA and requires a minimum operating current of 400 µA. The component is housed in an 8-pin TSSOP surface-mount package.

Voltage Reference Feature Summary

• Precision shunt regulation architecture with factory-trimmed initial accuracy
• Integrated adjustable terminal allowing ±5% voltage trimming capability
• Low dynamic impedance design for stable reference performance
• Wide operational current range supporting diverse load conditions

Voltage Reference Applications

• High-resolution analog-to-digital converter (ADC) reference sources
• Digital-to-analog converter (DAC) voltage references
• Precision digital voltmeter input stages
• Current loop measurement system references
• Power supply monitoring circuits

Voltage Reference Procurement Notes

Verify the specific suffix 'E4' indicates lead-free compliance status against the official datasheet. Confirm the package type matches the required PCB footprint, as variations exist within the LT1009 family. Check for obsolescence notices or lifecycle changes directly from Texas Instruments documentation before finalizing procurement plans.

Voltage Reference Selection Notes

Select this component when a fixed 2.5 V reference with high initial accuracy is required in a compact surface-mount form factor. Ensure the application demands a shunt topology rather than a series regulator. Verify that the thermal environment remains within the specified industrial temperature range for optimal stability.

Voltage Reference Part Context

This part belongs to the LT1009 family of precision voltage references, designed to replace older discrete zener-based solutions. It integrates bandgap reference technology with on-chip trimming to achieve superior temperature stability compared to standard commercial alternatives.

Voltage Reference Replacement Considerations

LT1009CDR: Pin-compatible SOIC-8 alternative with similar electrical characteristics. LT1009IDR: Higher accuracy variant available in SOIC-8 packaging. LT1009CLP: Through-hole TO-92 version for legacy board designs.