LM4128BQ1MF2.0/NOPB

Product Overview

The LM4128BQ1MF2.0/NOPB from Texas Instruments is a fixed series voltage reference in a SOT-23-5 surface-mount package. It provides a 2.048V output with ±0.2% tolerance and a 75ppm/°C temperature coefficient. The device operates from a 2.448V to 5.5V input, has a 20 mA output current, and draws 100µA supply current. Its noise is 190µVp-p from 0.1Hz to 10Hz. It is an automotive-grade device qualified to AEC-Q100.

Key Features

• Fixed 2.048V series voltage reference output
• ±0.2% output tolerance and 75ppm/°C temperature coefficient
• 20 mA output current and 100µA supply current
• 190µVp-p noise from 0.1Hz to 10Hz
• 2.448V to 5.5V input voltage range
• -40°C to 125°C junction temperature range
• AEC-Q100 qualified automotive grade
• SOT-23-5 surface-mount package

Applications

• Reference voltage for analog-to-digital converters requiring a fixed 2.048V input reference
• Biasing or thresholding in sensor signal chains where low supply current is relevant
• Feedback reference in automotive power management circuits qualified to AEC-Q100
• Compact measurement modules using a surface-mount SOT-23-5 reference

Design & Procurement Notes

Designers should verify that the fixed 2.048V output, ±0.2% tolerance, and 75ppm/°C coefficient fit the system accuracy budget. The 2.448V to 5.5V input range and 100µA supply current are useful for low-power rail-derived reference circuits, while the 20 mA output current should be checked against the reference load. The 190µVp-p 0.1Hz to 10Hz noise and -40°C to 125°C junction temperature range are relevant for measurement stability and thermal design. The SOT-23-5 surface-mount package requires SMT assembly and footprint planning, and AEC-Q100 automotive qualification should be considered for automotive use.