LM4140BCMX-4.1/NOPB

Voltage Reference Overview

The LM4140BCMX-4.1/NOPB is a micropower low-dropout series voltage reference manufactured by Texas Instruments, formerly National Semiconductor. It provides a fixed output voltage of 4.096 V with an initial accuracy of 0.1% and a temperature coefficient of 6 ppm/°C. The device operates within a supply voltage range up to 5.6 V and supports a maximum shunt current of 8 mA. It functions in an ambient temperature range from 0°C to +70°C and is housed in an 8-pin SOIC-Narrow (SOIC-8) surface-mount package.

Voltage Reference Feature Summary

• Micropower low-dropout series voltage reference design
• High precision with 0.1% initial accuracy
• Integrated enable pin for power management

Voltage Reference Applications

• Precision analog-to-digital converter (ADC) references
• Digital-to-analog converter (DAC) voltage sources
• Battery-powered instrumentation systems

Voltage Reference Procurement Notes

Verify the manufacturer designation as Texas Instruments, which acquired National Semiconductor. Confirm the suffix /NOPB indicates lead-free and RoHS compliance. Ensure the package matches the SOIC-8 narrow variant and validate the specific 4.096 V output version against the requested model number.

Voltage Reference Selection Notes

Select this component when a stable 4.096 V reference is required with tight tolerance specifications. The low dropout characteristic allows operation from lower input voltages compared to standard references. The micropower consumption makes it suitable for battery-operated applications where energy efficiency is critical.

Voltage Reference Part Context

This part belongs to the LM4140 family of precision voltage references. The 'BCM' suffix typically denotes the commercial temperature grade and the specific package type. The '/NOPB' suffix signifies that the device is manufactured without lead and is compliant with RoHS directives, aligning with modern environmental standards for electronic components.

Voltage Reference Replacement Considerations

LM4140ACM-4.1/NOPB: Offers similar performance with potentially different temperature coefficients or accuracy grades depending on the specific sub-series. LM4140IMX-4.1/NOPB: Provides extended industrial temperature range capabilities (-40°C to +125°C) while maintaining the same electrical characteristics and pinout.