LM285BXM-2.5

Overview

The LM285BXM-2.5 is a shunt precision voltage reference manufactured by Texas Instruments, operating within an extended industrial temperature range of -40°C to +85°C. It provides a fixed nominal output voltage of 2.5 V with an initial accuracy of ±1.5%. The device features a maximum shunt current capability of 20 mA and exhibits a temperature coefficient of 150 ppm/°C. Packaged in an SOIC-8 surface-mount format, it serves as a stable reference element for analog circuits requiring precise voltage regulation under varying thermal conditions.

Feature Summary

• Provides a stable 2.5 V reference voltage suitable for precision analog applications
• Operates reliably across the full industrial temperature range from -40°C to +85°C
• Supports high shunt currents up to 20 mA for robust circuit driving capabilities

Applications

• Precision analog-to-digital converter (ADC) reference inputs
• Digital-to-analog converter (DAC) voltage references
• Battery-powered instrumentation requiring stable bias voltages
• Microcontroller power supply monitoring circuits

Procurement Notes

Verify the specific suffix 'BXM' corresponds to the required package variant and temperature grade. Confirm RoHS compliance status via the official datasheet, as older revisions may differ. Ensure the ordering code matches the exact tolerance and packaging requirements for your production line. Cross-reference the manufacturer part number against authorized distributors to avoid counterfeit components.

Selection Notes

Select this component when a fixed 2.5 V reference is needed with moderate accuracy and higher current drive than micro-power alternatives. The SOIC-8 package facilitates automated surface-mount assembly. Consider the 150 ppm/°C temperature coefficient against application thermal stability needs. Compare against the LM385 series if lower cost or different accuracy grades are acceptable for the design.

Part Context

This device belongs to the LM285 family of shunt voltage references, which are widely used in industrial and commercial electronics. The 'B' suffix typically denotes improved accuracy compared to standard variants, while 'XM' indicates the SOIC-8 surface-mount package. This family offers a balance between performance and cost for general-purpose voltage referencing tasks.

Replacement Considerations

The LM285BXM-2.5/NOPB is the lead-free, RoHS-compliant version of this component. Verify pinout compatibility before substituting with other 2.5 V shunt references like the LM385 series, noting potential differences in temperature coefficients and initial accuracy.