LM385BM-1.2

Noise - 0.1Hz to 10Hz:	--
Base Part Number:	LM385
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 70°C (TA)
Current - Cathode:	15µA
Current - Supply:	--
Voltage - Input:	--
Noise - 10Hz to 10kHz:	60µVrms
Series:	--
Temperature Coefficient:	150ppm/°C
Tolerance:	±1%
Current - Output:	20mA
Voltage - Output (Min/Fixed):	1.235V
Output Type:	Fixed
Reference Type:	Shunt
Part Status:	Not For New Designs
Packaging:	Tube

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Introduction

The LM385BM-1.2 is a micropower voltage reference (PMIC - Voltage Reference) designed specifically for applications requiring excellent low-power performance and low voltage operation. The device features a temperature coefficient close to zero, making it an ideal choice for applications requiring sensitive and stable voltage control over temperature changes. LM385BM-1.2 is extremely versatile and is suitable for multiple applications including supply rail reference, switching power supplies, instrumentation, and other critical voltage measurement systems.

Application Field

Due to its small profile, low power consumption and excellent low voltage performance, the LM386BM-1.2 is ideal for use in a variety of applications, including as a narrow bandwidth power supply and as a reference for A/D converters. It can also be used for instrumentation and control with its excellent low temperature coefficient, small profile and low current drain.The LM386BM-1.2 can also be used in precision measurement systems due to its excellent long-term stability and high accuracy. It is also very suitable for medical instrumentation applications as well as military and space systems due to its excellent low power performance. It can also be used in industrial control systems and as a programmable reference in notebook computers.The LM386BM-1.2 can also be used in LCD backlighting applications to provide a stable voltage source for display. It is ideal for automotive applications and can be used in DC-DC converter circuits including those in cellular phones, modems and other consumer electronics.

Working Principle

The LM385BM-1.2 utilizes a temperature compensated voltage reference element that provides a highly accurate and stable output voltage despite temperature variations. It operates from a single 2.7V to 5.5V supply and is capable of driving up to 10mA of output current.The voltage reference element in the LM385BM-1.2 utilizes a combination of internal series resistors, a high accuracy amplifier, and temperature compensation. This combination provides the device\'s temperature coefficient and long-term stability.The device\'s output voltage is controlled by two external resistors and can be fine tuned for the specific application. The output voltage is determined by the voltage divider ratio of the two external resistors. An optional internal current limit can be enabled to protect against excessive current draw.

Conclusion

The LM385BM-1.2 is a micropower voltage reference designed specifically for applications requiring excellent low-power performance and low voltage operation. It utilizes a temperature compensated voltage reference element that provides a highly accurate and stable output voltage despite temperature variations. The output voltage is controlled by two external resistors and can be fine tuned for the specific application. The LM385BM-1.2 is an ideal choice for applications requiring sensitive and stable voltage control over temperature changes and is suitable for multiple applications including supply rail reference, switching power supplies, instrumentation, and other critical voltage measurement systems.

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