LM9140BYZ-4.1

Voltage Reference Overview

The LM9140BYZ-4.1 is a precision micropower shunt voltage reference integrated circuit manufactured by National Semiconductor. It provides a fixed output voltage of 4.1V with an initial accuracy tolerance of ±0.5%. The device is designed for low-power applications, supporting a maximum operating current of 15 mA. It is housed in a TO-92-3 package, suitable for space-constrained designs requiring stable voltage regulation.

Voltage Reference Feature Summary

• Precision micropower shunt voltage reference design
• Fixed 4.1V output voltage capability
• ±0.5% initial accuracy specification
• TO-92-3 surface mount or through-hole compatible package

Voltage Reference Applications

• Battery-powered instrumentation circuits
• Portable measurement devices requiring stable reference
• Low-power analog signal conditioning stages
• Micropower data acquisition systems

Voltage Reference Procurement Notes

Verify the manufacturer origin, as National Semiconductor assets are now part of Texas Instruments. Confirm the specific suffix 'BYZ' matches the required package and temperature grade. Ensure the 4.1V variant is explicitly ordered, as the LM9140 series offers multiple voltage options. Check for RoHS compliance status if required by your manufacturing standards.

Voltage Reference Selection Notes

Select this component when a fixed 4.1V reference is needed with high initial accuracy in a small form factor. The micropower characteristic makes it ideal for battery-operated equipment where quiescent current must be minimized. Compare against other shunt references if lower noise or tighter long-term stability is required for your specific application.

Voltage Reference Part Context

The LM9140 series comprises precision micropower shunt voltage references available in various fixed output voltages. These devices are engineered to provide stable reference voltages with minimal power consumption. The series is widely used in industrial and consumer electronics where reliable voltage regulation is critical for analog circuit performance.

Voltage Reference Replacement Considerations

Check for direct pin-compatible substitutes within the LM9140 family offering different voltage outputs if system requirements change. Verify that any replacement maintains the same TO-92-3 package and electrical characteristics, particularly the 15 mA current limit and accuracy class.