LM4128CMF-3.3/NOPB

Voltage Reference Overview

The LM4128CMF-3.3/NOPB is a precision micropower shunt voltage reference manufactured by Texas Instruments, housed in an SOT-23-5 surface-mount package. It provides a fixed output voltage of 3.3V with an initial accuracy tolerance of ±0.5%. The device operates within a temperature range of -40°C to +125°C and features a temperature coefficient of 100 ppm/°C. Key electrical specifications include a maximum input voltage of 6V, a maximum shunt current of 20 mA, and a supply current of 100 µA. Noise performance is specified at 310 µVp-p over the 0.1 Hz to 10 Hz frequency band.

Voltage Reference Feature Summary

• Provides stable series precision voltage reference functionality for analog circuitry
• Designed for low-power applications with micropower consumption characteristics
• Capable of maintaining accuracy across extended industrial temperature ranges

Voltage Reference Applications

• Portable instrumentation requiring precise voltage standards
• Battery-powered measurement systems
• Data acquisition systems needing stable reference sources

Voltage Reference Procurement Notes

Verify the specific suffix and marking code against the manufacturer's latest datasheet to ensure compatibility with your design requirements. Confirm RoHS compliance status and packaging options such as cut tape or reel availability through authorized distributors. Check for any recent product change notices regarding assembly sites or material substitutions before finalizing procurement orders.

Voltage Reference Selection Notes

Select this component when a fixed 3.3V reference with moderate precision is required in space-constrained designs. The SOT-23-5 package offers a compact footprint suitable for dense PCB layouts. Consider the 100 ppm/°C temperature coefficient and 0.5% initial accuracy against application stability needs. Ensure the operating voltage remains within the specified 3.7V to 5.5V input range for optimal regulation.

Voltage Reference Part Context

This part belongs to the LM4128 family of micropower shunt voltage references from Texas Instruments. The family includes various output voltages and accuracy grades, such as the LM4128BMF and LM4128DMFX variants. These devices are commonly used in power management integrated circuits (PMIC) subsystems where reliable voltage referencing is critical for system performance and signal integrity.

Voltage Reference Replacement Considerations

LM4128CMF-3.3/NOPB is functionally equivalent to LM4128CMF-3.3. Other compatible parts within the same series include LM4128BMF-3.3/NOPB for higher accuracy and LM4128DMF-3.3/NOPB for different tolerance levels.