XB385M3-1.2 Micropower Voltage Reference Diode

Overview

The XB385M3-1.2 from XINLUDA is a highly accurate Voltage Reference (Vref) IC, designed for applications requiring a precise 1.2V reference voltage. The LM385M3X-1.2/NOPB from Texas Instruments is a comparable voltage reference device that offers similar performance. However, the XB385M3-1.2 provides several advantages over the LM385M3X-1.2/NOPB, including lower power consumption, better temperature stability, and more accurate voltage tolerance, making it more suitable for modern high-precision and energy-efficient applications.

Voltage Accuracy

Voltage accuracy is one of the most critical aspects when evaluating voltage reference components.

• The XB385M3-1.2 features a typical output voltage tolerance of ±0.5% over temperature, which ensures precise and consistent voltage regulation across a wide range of environmental conditions.

• In comparison, the LM385M3X-1.2/NOPB offers a wider tolerance of ±1.0% at 25°C, which could result in greater variation in output voltage under changing conditions.

The XB385M3-1.2 provides better voltage accuracy, making it ideal for precision systems that require highly stable reference voltages, such as sensor calibration, analog-to-digital conversion (ADC) circuits, and digital-to-analog conversion (DAC) applications.

Temperature Coefficient

The temperature coefficient of a voltage reference is critical for maintaining accurate output voltage over varying environmental conditions, particularly in temperature-sensitive applications.

• The XB385M3-1.2 offers a temperature coefficient of 50ppm/°C, ensuring excellent stability across a wide temperature range, making it suitable for applications where precise voltage regulation is needed under fluctuating temperatures.

• The LM385M3X-1.2/NOPB has a temperature coefficient of 100ppm/°C, which is roughly double that of the XB385M3-1.2. This higher temperature coefficient could lead to greater variations in the output voltage when the device operates in environments with significant temperature changes.

The XB385M3-1.2's lower temperature coefficient gives it a significant advantage in automotive, industrial, and aerospace applications, where temperature variations are more extreme and precision is crucial.

Power Consumption

Low power consumption is particularly important in battery-powered or energy-sensitive applications.

• The XB385M3-1.2 is designed to operate with a low quiescent current of 40μA, making it an energy-efficient choice for low-power systems.

• On the other hand, the LM385M3X-1.2/NOPB has a slightly higher quiescent current of 60μA, resulting in increased power consumption in low-power applications.

The XB385M3-1.2’s lower quiescent current allows for longer battery life and better energy efficiency in battery-operated devices and portable electronics.

Load Regulation

Load regulation refers to the ability of the voltage reference to maintain a stable output voltage despite changes in the load current.

• The XB385M3-1.2 offers a superior load regulation performance with a typical value of 0.1% over a wide range of load currents, ensuring stable performance in varying load conditions.

• The LM385M3X-1.2/NOPB provides a load regulation of 0.2% at best, which could result in less stable voltage under fluctuating load conditions.

The XB385M3-1.2's superior load regulation ensures that it maintains precise voltage output even when the load current varies, making it a better choice for high-precision applications like data acquisition and communication systems.

Package and Size

The XB385M3-1.2 and LM385M3X-1.2/NOPB both come in SOT-23-3 packages, which are compact and suitable for space-constrained designs. However, the XB385M3-1.2 offers a more optimized layout, enabling efficient thermal dissipation and reducing package size without compromising performance. This makes the XB385M3-1.2 ideal for high-density PCBs and applications where space is at a premium.

Additionally, the compact design of the XB385M3-1.2 makes it more suitable for portable electronics and other small-form-factor devices.

Application Suitability

The XB385M3-1.2 is ideal for a wide range of precision applications where low power consumption, tight voltage accuracy, and temperature stability are required. This includes applications such as:

• High-precision sensors

• Portable electronics

• Medical devices

• Battery-powered systems

• Communication equipment

While the LM385M3X-1.2/NOPB can also be used in these applications, the XB385M3-1.2 stands out due to its lower temperature coefficient, better voltage accuracy, and improved load regulation, which make it more suitable for modern, high-precision, and energy-efficient designs.

Conclusion

In conclusion, the XINLUDA XB385M3-1.2 offers clear advantages over the Texas Instruments LM385M3X-1.2/NOPB in the following areas:

• Better voltage accuracy with a ±0.5% tolerance vs. ±1.0%

• Lower temperature coefficient (50ppm/°C vs. 100ppm/°C)

• Lower power consumption (40μA vs. 60μA quiescent current)

• Superior load regulation for better performance under varying load conditions

These advantages make the XB385M3-1.2 the more suitable choice for precision applications that demand low power, high stability, and efficient performance.