LM385-1.2-MWC

Product Overview

Category

The LM385-1.2-MWC belongs to the category of voltage references.

Use

It is commonly used as a precision shunt regulator in various electronic circuits.

Characteristics

• Provides a stable and accurate reference voltage of 1.2 volts.
• Low temperature coefficient ensures consistent performance over a wide range of temperatures.
• High initial accuracy allows for precise voltage regulation.
• Low power consumption makes it suitable for battery-powered applications.

Package

The LM385-1.2-MWC is available in a small SOT-23 package, which is compact and easy to integrate into circuit designs.

Essence

This voltage reference is designed to provide a reliable and constant voltage source for electronic devices, ensuring accurate and stable operation.

Packaging/Quantity

The LM385-1.2-MWC is typically sold in reels or tubes containing a quantity of 3000 units per package.

Specifications

• Output Voltage: 1.2 volts
• Initial Accuracy: ±0.5%
• Temperature Coefficient: 20 ppm/°C
• Operating Temperature Range: -40°C to +85°C
• Supply Voltage Range: 2.7V to 40V
• Quiescent Current: 120 µA (typical)

Detailed Pin Configuration

The LM385-1.2-MWC has three pins:

1. Vout: Output pin providing a stable reference voltage of 1.2 volts.
2. GND: Ground pin connected to the common ground of the circuit.
3. Vin: Input pin connected to the supply voltage source.

Functional Features

• Precise Voltage Reference: The LM385-1.2-MWC offers a highly accurate and stable reference voltage, ensuring consistent performance in voltage regulation applications.
• Low Power Consumption: With a low quiescent current, it minimizes power consumption, making it suitable for battery-powered devices.
• Wide Operating Temperature Range: The LM385-1.2-MWC can operate reliably in extreme temperature conditions, ranging from -40°C to +85°C.
• Low Temperature Coefficient: Its low temperature coefficient ensures that the output voltage remains stable over a wide range of temperatures.

Advantages and Disadvantages

Advantages

• High initial accuracy
• Low temperature coefficient
• Compact package size
• Low power consumption

Disadvantages

• Limited output voltage options
• Requires an external resistor for precise voltage regulation

Working Principles

The LM385-1.2-MWC utilizes a bandgap reference circuit to generate a stable 1.2-volt output voltage. It compensates for temperature variations by employing a proportional-to-absolute-temperature (PTAT) current source and a negative temperature coefficient (NTC) resistor. This design ensures that the output voltage remains constant despite changes in temperature.

Detailed Application Field Plans

The LM385-1.2-MWC finds applications in various electronic systems where accurate and stable voltage references are required. Some common application areas include:

1. Precision Analog Circuits: It is used as a reference voltage for analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and operational amplifiers (op-amps).
2. Power Management Systems: It provides a stable voltage reference for voltage regulators, ensuring reliable and efficient power management.
3. Sensor Interfaces: The LM385-1.2-MWC is employed in sensor interfaces to provide a precise reference voltage for accurate sensor measurements.
4. Battery-Powered Devices: Due to its low power consumption, it is suitable for use in portable and battery-powered devices, such as handheld instruments and consumer electronics.

Detailed and Complete Alternative Models

1. LM4040-1.2: This voltage reference offers similar specifications and performance characteristics to the LM385-1.2-MWC.
2. LT1004-1.2: Another alternative with comparable features, providing a stable 1.2-volt reference voltage.

These alternative models can be considered based on specific application requirements and availability.

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