LM4140BCM-1.0

Voltage Reference Overview

The LM4140BCM-1.0 is a precision micropower low-dropout series voltage reference manufactured by Texas Instruments. It provides a fixed output voltage of 1.024 V with an initial accuracy of 0.1% and a temperature coefficient of 3 ppm/°C. The device operates within a supply voltage range of 1.8 V to 5.6 V, drawing a typical quiescent current of 230 µA. It features a maximum shunt current of 8 mA and functions reliably across an operating temperature range of 0°C to +70°C. Packaged in an 8-pin SOIC (Narrow) surface-mount package, it integrates an enable pin for power management.

Voltage Reference Feature Summary

• High precision with 0.1% initial accuracy and ultra-low noise characteristics
• Low temperature drift ensuring stability across wide environmental ranges
• Micropower operation with low dropout voltage capability
• Integrated enable pin for efficient power control

Voltage Reference Applications

• Precision instrumentation systems
• Portable battery-powered test equipment
• Data acquisition circuits requiring stable references
• Medical devices demanding high accuracy

Voltage Reference Procurement Notes

Verify the specific suffix against official datasheets to confirm exact electrical tolerances and package variations. Ensure compatibility with existing PCB footprints for the SOIC-8 narrow package. Confirm RoHS compliance status if required by project specifications. Cross-reference part numbers with authorized distributors to avoid counterfeit components. Validate that the 0°C to +70°C industrial temperature range meets your operational environment requirements.

Voltage Reference Selection Notes

Select this component when a fixed 1.024 V reference is required with high accuracy and low power consumption. It is suitable for designs needing an enable function to extend battery life. Compare against other LM4140 variants if different output voltages or tighter temperature coefficients are needed. Consider the SOIC-8 package constraints for space-limited applications. Ensure input voltage remains above the minimum requirement for proper regulation.

Voltage Reference Part Context

This device belongs to the LM4140 family of precision voltage references from Texas Instruments. The family includes various output voltage options and accuracy grades. The BCM suffix indicates a specific temperature grade and packaging configuration. It serves as a stable reference for analog-to-digital converters and sensor interfaces.

Voltage Reference Replacement Considerations

LM4140ACM-1.0/NOPB offers similar performance with potentially different temperature grading. LM4140BCMX-1.0 provides the same electrical characteristics in a tape-and-reel format. Verify pinout compatibility before substitution.