SPX431AN-L/TR

Temperature Coefficient:	30ppm/°C
Supplier Device Package:	TO-92-3
Package / Case:	TO-226-3, TO-92-3 (TO-226AA) (Formed Leads)
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 125°C (TA)
Current - Cathode:	1mA
Current - Supply:	--
Voltage - Input:	--
Noise - 10Hz to 10kHz:	--
Noise - 0.1Hz to 10Hz:	--
Series:	--
Tolerance:	±0.5%
Current - Output:	150mA
Voltage - Output (Max):	36V
Voltage - Output (Min/Fixed):	2.503V
Output Type:	Adjustable
Reference Type:	Shunt
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Introduction

The SPX431AN-L/TR is a voltage reference designed using a combination of advanced process, low-temperature drift, low power, and high accuracy characteristics. It provides precise, stable, surge and noise-free voltage references from as low as 3.3V to as high as 12V to satisfy a wide variety of general-purpose, low-power and precision applications in digital devices. The SPX431AN-L/TR can be used as a drop-in replacement for devices using various reference levels and a variety of logic families. Additionally, the device is equipped with a very low power consumption, and a very low quiescent current that makes it ideal for portable, low-power, secure applications.This article will discuss the application field and working principle of the SPX431AN-L/TR.

Application Field

The application fields of the SPX431AN-L/TR are mainly in the area of precision electronics, such as in point-of-sale terminals, clocks, agriculture apparatus, and hand-held devices. In these applications, the device can be used as a precise voltage reference. For example, the device can be used in a POS terminal as a precise reference for providing a stable and accurate voltage to the sensitive peripheral components. The device can also be used in clocks, particularly in digital quartz clock types, to provide accurate voltage references for quartz timers and other elements. Its low noise and low power characteristics make it perfect for use in other sensitive applications in agriculture. Finally, its portability and accurate voltage reference make it the ideal choice for use in hand-held devices that are used in many different environments.

Working Principle

The SPX431AN-L/TR is based on an advanced low-temperature-drift circuit structure that utilizes two complementary error amplifiers. One of the amplifiers, referred to as the reference amplifier, is driven by the external reference resistor, while the other, referred to as the comparator, is driven by the monitoring circuitry. The voltage reference is generated by comparing the signals from the two amplifiers and generating a difference voltage.The reference signal is also compensated for modifications in voltage due to temperature fluctuations by using a TCXO (Temperature Controlled Crystal Oscillator). The TCXO helps to ensure that the reference signal remains as accurate and stable as possible, even when there are large variations in the ambient temperature.The SPX431AN-L/TR also utilizes a unique protection feature which helps to ensure that the device remains protected against overloads and voltage surges. This protection circuitry is built into the device and helps to ensure that the voltage reference remains stable and accurate even when there are sudden increases in the load.

Conclusion

The SPX431AN-L/TR is a precision voltage reference device that is designed to be used in a variety of precision applications. It has low power consumption, low noise, low temperature drift characteristics, and a unique protection feature that helps to ensure that the voltage reference remains stable and accurate. Its advanced circuit structure and simple design make it a perfect choice for applications that require precise and reliable voltage references.

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