LM4140BCM-2.5

Voltage Reference Overview

The LM4140BCM-2.5 is a micropower low dropout voltage reference manufactured by Texas Instruments, designed for precision applications requiring stable output voltages. It operates within a temperature range of 0°C to +70°C and features an initial accuracy of 0.1%. The device delivers a fixed output voltage of 2.5V with a typical temperature coefficient of 6 PPM/°C. It supports a maximum shunt current of 8 mA and accepts input voltages up to 5.6 V. The component consumes approximately 230 µA of operating supply current and is housed in an SOIC-Narrow-8 package.

Voltage Reference Feature Summary

• Micropower operation with low quiescent current consumption suitable for battery-powered systems
• High precision performance with tight initial accuracy and low temperature drift
• Low dropout capability allowing efficient regulation from varying input sources
• Compact surface-mount packaging for space-constrained circuit designs

Voltage Reference Applications

• Portable instrumentation requiring precise voltage references
• Battery-operated measurement devices
• Data acquisition systems needing stable analog references
• Calibration equipment requiring high accuracy

Voltage Reference Procurement Notes

Verify the specific suffix and tolerance grade when ordering, as variations exist within the LM4140 family. Confirm RoHS compliance status and lead times directly with authorized distributors or Texas Instruments. Ensure the selected package matches your PCB footprint requirements. Check for any recent product change notifications that may affect pinout or electrical characteristics before finalizing procurement.

Voltage Reference Selection Notes

Select this component when a 2.5V reference is required with high precision and low power consumption. Consider the 0°C to +70°C operating range against your environmental conditions. Evaluate the 8 mA shunt current limit to ensure adequate load regulation. Compare the 6 PPM/°C temperature coefficient against stricter requirements that might necessitate higher-grade variants like the A version.

Voltage Reference Part Context

The LM4140 series represents Texas Instruments' line of micropower precision voltage references. These devices are engineered to provide stable reference voltages in compact packages. The BCM variant specifically denotes the commercial temperature range and SOIC-8 narrow package configuration. This series is widely used in industrial and consumer electronics where size and power efficiency are critical design constraints.

Voltage Reference Replacement Considerations

Direct substitutes include other LM4140 variants with different output voltages or accuracy grades, such as LM4140ACM-2.5/NOPB for improved temperature coefficients. Cross-reference with LM4040 series shunt references if parallel topology is acceptable. Verify pin compatibility and thermal performance when substituting with components from other manufacturers offering similar specifications.