LM4128CMF-2.0/NOPB

Voltage Reference Overview

The LM4128CMF-2.0/NOPB is a precision micropower shunt voltage reference from Texas Instruments, housed in an SOT-23-5 package. It provides a fixed output voltage of 2.048 V with an initial accuracy of 0.5%. The device operates within a supply voltage range up to 6 V and supports a maximum shunt current of 20 mA. It features a temperature coefficient of 100 ppm/°C and consumes only 60 µA of quiescent current. The component functions reliably across an extended temperature range from -40°C to +125°C.

Voltage Reference Feature Summary

• Delivers stable 2.048 V reference voltage with 0.5% initial accuracy
• Ultra-low power consumption of 60 µA for battery-operated applications
• Compact SOT-23-5 surface-mount packaging for space-constrained designs
• Wide operating temperature range supporting industrial environments

Voltage Reference Applications

• Portable instrumentation requiring low-power voltage references
• Battery-powered measurement systems
• Data acquisition systems needing precise analog references
• Microcontroller peripheral voltage regulation

Voltage Reference Procurement Notes

Verify the complete part number including the suffix /NOPB to ensure lead-free compliance and specific tolerance grades. Confirm the SOT-23-5 package variant matches your PCB footprint requirements. Check the datasheet for thermal derating curves if operating near maximum current limits. Ensure input voltage remains within the specified 6 V maximum to prevent device damage. Validate that the 0.5% accuracy class meets your system's precision requirements before ordering.

Voltage Reference Selection Notes

Choose this component when a fixed 2.048 V reference is required with minimal quiescent current draw. The 0.5% accuracy offers a balance between cost and precision for general-purpose applications. Consider the SOT-23-5 package size against available board space. Evaluate the 100 ppm/°C temperature coefficient against environmental stability needs. Compare against higher accuracy variants like the AMF series if tighter tolerances are necessary.

Voltage Reference Part Context

This part belongs to the LM4128 family of micropower shunt voltage references designed by Texas Instruments. The CMF designation indicates the commercial grade with 0.5% initial accuracy. The NOPB suffix confirms non-lead (Pb)-free construction compliant with RoHS standards. It serves as a compact alternative to larger package references in portable electronics.

Voltage Reference Replacement Considerations

LM4128AMFX-2.0/NOPB offers improved 0.1% accuracy. LM4128BMF-2.0/NOPB provides 0.2% accuracy. LM4128DMFX-2.0/NOPB delivers 1% accuracy. All share identical pinouts and electrical characteristics except for initial accuracy specifications.