LM431ACM

Noise - 0.1Hz to 10Hz:	--
Base Part Number:	LM431
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-25°C ~ 85°C (TA)
Current - Cathode:	1mA
Current - Supply:	--
Voltage - Input:	--
Noise - 10Hz to 10kHz:	--
Series:	--
Temperature Coefficient:	50ppm/°C Typical
Tolerance:	±2%
Current - Output:	100mA
Voltage - Output (Max):	36V
Voltage - Output (Min/Fixed):	2.5V
Output Type:	Adjustable
Reference Type:	Shunt
Part Status:	Obsolete
Packaging:	Tube

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LM431ACM is a widely used commercial voltage reference IC, providing high performance and good accuracy, widely used in many application fields. System designers have been using LM431ACM devices to provide accurate reference voltages for their circuits in a wide range of applications, such as current sources/sinks, temperature measuring, power supplies, AC-DC converters, analog-to-digital (AD) converters, and many more. This paper will explore the application fields and working principle of LM431ACM. Application Field Voltage References: The voltage reference design usually requires extremely stable references, which can provide basic reference voltages for other components in the system. LM431ACM provides very stable reference voltage and low temperature coefficient. It can be used for applications like data acquisition systems, instrumentation and medical instrumentation.Current Sources / Sinks: Current sources and sinks are commonly used for low-power applications, and LM431ACM is the perfect choice for these applications. It can provide linear and relatively low output voltage to be used as current sources or sinks. It can also be used in applications that require high accuracy and stability. Temperature Measuring: Temperature measurement is an important task that needs proper circuit design. LM431ACM can be used to measure temperature in different environments and applications. It can provide a very accurate and stable reference voltage for the temperature circuit, making it possible to get accurate temperature readings.Power Supplies: LM431ACM is used in power supplies and AC-DC converters to provide a very accurate reference voltage to ensure optimal performance. It is also used in high power voltage regulators and switching power supplies, helping to ensure consistent output voltage and stability.Analog-to-Digital (AD) Converters: LM431ACM is commonly used in AD converters to provide a stable reference voltage for the AD conversion process. Its accuracy and stability makes it ideal for these applications.As these applications show, LM431ACM is a very versatile and widely used device that is used in a variety of circuits and applications. Working Principle The LM431ACM is based on the voltage reference principle which involves comparing the voltage of a reference circuit with the applied input voltage. The output of the reference circuit is compared to the input voltage, and the output voltage is adjusted to match.In the case of the LM431ACM, the reference circuit is a steep slope zener diode and a bias network, which is connected between the reference pin and the ground. The zener diode is responsible for providing a reference voltage, while the bias network helps to adjust the voltage drop over the zener diode. Basically, when no input voltage is applied, the LM431ACM will provide a default reference voltage of 2.496V. When the input voltage is applied, the LM431ACM will adjust its output voltage to match the input voltage up to 2.5V.The LM431ACM also has two built-in differential amplifier stages, which help to improve accuracy and stability, as well as providing a high common mode rejection ratio.Thus, LM431ACM is able to provide high-performance and accurate reference voltages to enable different applications and system designs. It\'s a great choice for those who need high accuracy and stable reference voltages.

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