LM285LP-2-5

Overview

The LM285LP-2-5 is a fixed shunt voltage reference manufactured by Texas Instruments, designed for precision applications requiring stable voltage regulation. It operates within a temperature range of -40°C to +85°C and utilizes a TO-92-3 through-hole package. The device provides a nominal output voltage of 2.5V with an initial accuracy of ±1.5%. Key electrical parameters include a maximum shunt current of 20 mA, a minimum operating current of 20 µA, and a temperature coefficient of 20 ppm/°C. Noise performance is specified at 120 µVrms over the 10 Hz to 10 kHz frequency band.

Feature Summary

• Provides a stable 2.5V reference voltage with high initial accuracy
• Operates effectively across a wide temperature range from -40°C to +85°C
• Features low dynamic impedance and low noise characteristics for signal integrity
• Supports micro-power operation with minimal quiescent current requirements

Applications

• Analog-to-digital converter (ADC) reference sources
• Digital-to-analog converter (DAC) voltage references
• Portable battery-powered instrumentation circuits
• Sensor interface conditioning circuits

Procurement Notes

Verify the specific suffix 'LP' confirms the TO-92-3 through-hole package variant rather than surface-mount options. Ensure the '-2-5' designation matches the required 2.5V fixed output tolerance. Confirm RoHS compliance status if environmental regulations apply to the assembly process. Check for any recent Product Change Notifications regarding material or manufacturing site changes that may affect long-term sourcing stability.

Selection Notes

Select this component when a fixed 2.5V reference is needed in a through-hole design. The ±1.5% initial accuracy suits general-purpose precision tasks. Consider the 20 ppm/°C temperature coefficient for thermal stability requirements. Compare against adjustable variants if circuit flexibility for voltage setting is required instead of a fixed output level.

Part Context

This part belongs to the LM285 family of shunt voltage references, which are widely used as standard voltage references in electronic systems. The LM285 series offers both adjustable and fixed voltage versions, providing designers with options for various precision analog applications. The LP suffix specifically denotes the plastic TO-92 package style commonly used in prototyping and through-hole PCB designs.

Replacement Considerations

• LM285Z-2.5/NOPB

FAQ

What is the minimum operating current for the LM285LP-2-5?

The minimum operating current is 20 µA, allowing for efficient use in low-power applications.

Does the LM285LP-2-5 support surface mount installation?

No, the LM285LP-2-5 uses a TO-92-3 package designed for through-hole mounting only.