LM385PSR-1-2

Product Overview

Category

The LM385PSR-1-2 belongs to the category of voltage references.

Use

It is commonly used as a precision voltage reference in various electronic circuits.

Characteristics

• High accuracy and stability
• Low temperature coefficient
• Low power consumption
• Wide operating voltage range

Package

The LM385PSR-1-2 is available in a small surface mount package (SOT-23).

Essence

The essence of LM385PSR-1-2 lies in its ability to provide a stable and accurate voltage reference, which is crucial for many electronic applications.

Packaging/Quantity

The LM385PSR-1-2 is typically packaged in reels or tubes, with a quantity of 3000 units per reel/tube.

Specifications

• Output Voltage: 1.235V
• Initial Accuracy: ±0.5%
• Temperature Coefficient: 20ppm/°C
• Operating Voltage Range: 1.8V to 20V
• Quiescent Current: 120µA
• Load Regulation: 0.1%/mA
• Line Regulation: 0.01%/V

Detailed Pin Configuration

The LM385PSR-1-2 has three pins:

1. Vout: Output voltage pin.
2. GND: Ground reference pin.
3. Vin: Input voltage pin.

Functional Features

• Precise voltage reference for analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and other precision measurement systems.
• Stable output voltage over a wide range of operating conditions.
• Low power consumption makes it suitable for battery-powered devices.
• Excellent line and load regulation ensures consistent performance.

Advantages

• High accuracy and stability ensure reliable operation of precision circuits.
• Low temperature coefficient minimizes voltage drift with temperature changes.
• Wide operating voltage range allows for versatile applications.
• Small package size enables space-saving designs.

Disadvantages

• Limited output voltage options restrict its use in certain applications requiring different reference voltages.
• Sensitive to external noise and fluctuations, requiring proper filtering and decoupling techniques.

Working Principles

The LM385PSR-1-2 utilizes a bandgap voltage reference circuit to generate a stable and accurate 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 relatively constant over a wide temperature range.

Detailed Application Field Plans

The LM385PSR-1-2 finds extensive application in various electronic systems, including:

1. Precision measurement instruments
2. Data acquisition systems
3. Voltage regulators
4. Battery management circuits
5. Analog signal conditioning circuits

Detailed and Complete Alternative Models

1. LM4040: A series of precision voltage references with different output voltage options.
2. LT1021: High-precision voltage reference with ultra-low temperature coefficient.
3. REF5025: Precision voltage reference with low dropout voltage and high accuracy.

These alternative models offer similar functionality and can be used as substitutes for the LM385PSR-1-2 in specific applications.

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