LM4040DIM3-3.0/NOPB

Overview

The LM4040DIM3-3.0/NOPB is a micropower shunt voltage reference by Texas Instruments, delivering a fixed 3V output with ±1% initial accuracy. Housed in a compact SOT-23-3 package, it operates within a -40°C to +85°C temperature range and features a temperature coefficient of 150 ppm/°C. The device supports a maximum shunt current of 15 mA and draws a minimum cathode current of 70 µA. It exhibits low noise characteristics, specified at 35µVrms between 10Hz and 10kHz, ensuring stable performance for precision analog circuits.

Feature Summary

• Provides a stable fixed 3V reference voltage suitable for precision applications
• Operates with minimal quiescent current for power-sensitive designs
• Delivers low noise performance to maintain signal integrity
• Utilizes a compact surface-mount package for space-constrained layouts

Applications

• Portable battery-powered instrumentation requiring low power consumption
• Data acquisition systems needing precise analog-to-digital conversion references
• Temperature sensing circuits utilizing thermistors or RTDs
• Handheld measurement devices where size and efficiency are critical

Procurement Notes

Verify the complete part number including suffixes such as NOPB to ensure lead-free compliance and specific packaging options like cut tape or reel. Confirm that the required accuracy grade matches the design specifications, as variations exist within the LM4040 family. Check for any recent product change notices regarding packaging or manufacturing site updates to ensure long-term availability and consistency for production runs.

Selection Notes

Select this component when a fixed 3V reference is required with moderate precision and low power consumption. Consider the 150 ppm/°C temperature coefficient against environmental conditions; higher stability grades may be needed for wider temperature ranges. Ensure the circuit can provide the minimum operating current of 70 µA while staying within the 15 mA maximum limit. Evaluate noise requirements, as this device offers standard low-noise performance suitable for most general-purpose applications.

Part Context

This device belongs to the LM4040 series of micropower shunt voltage references from Texas Instruments. The series offers various fixed voltage outputs and accuracy grades in small packages. The LM4040DIM3 variant specifically denotes the SOT-23-3 package form factor with industrial temperature rating. It serves as a cost-effective solution for applications requiring reliable voltage referencing without the complexity of adjustable regulators.

Replacement Considerations

Direct replacements include other LM4040 variants with different voltage outputs or accuracy grades, such as LM4040CIM3-3.0/NOPB for tighter tolerance. Cross-reference with LM4040EIM3-3.0/NOPB for potentially different performance characteristics. Verify pinout compatibility and thermal management requirements when substituting with similar shunt references from other manufacturers.