LM385PSRE4-1-2

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Reference

Characteristics: - Low voltage reference - Precision output voltage - Low temperature coefficient - Low power consumption

Package: SOT-23-3

Essence: The LM385PSRE4-1-2 is a low voltage precision voltage reference IC that provides a stable and accurate output voltage. It is commonly used in various electronic circuits where a precise voltage reference is required.

Packaging/Quantity: The LM385PSRE4-1-2 is available in a SOT-23-3 package, which is a small surface-mount package. It is typically sold in reels or tubes containing multiple units.

Specifications

The LM385PSRE4-1-2 has the following specifications:

• Output Voltage: 1.225V
• Initial Accuracy: ±0.5%
• Temperature Coefficient: 20ppm/°C
• Operating Temperature Range: -40°C to +85°C
• Supply Voltage Range: 2.7V to 7V
• Quiescent Current: 120µA

Pin Configuration

The LM385PSRE4-1-2 has three pins arranged as follows:

```

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| | --| VOUT |-- --| GND |-- --| VIN |-- |_______| ```

Pin Description: - VOUT: Output Voltage - GND: Ground - VIN: Input Voltage

Functional Features

• Stable Output Voltage: The LM385PSRE4-1-2 provides a precise and stable output voltage of 1.225V, making it suitable for applications requiring accurate voltage references.
• Low Temperature Coefficient: The IC has a low temperature coefficient of 20ppm/°C, ensuring minimal voltage drift with temperature changes.
• Low Power Consumption: With a quiescent current of only 120µA, the LM385PSRE4-1-2 consumes very little power, making it suitable for battery-powered applications.

Advantages and Disadvantages

Advantages: - Precise and stable output voltage - Low temperature coefficient - Low power consumption - Small package size

Disadvantages: - Limited output voltage options (only 1.225V)

Working Principles

The LM385PSRE4-1-2 is based on bandgap reference technology. It utilizes a combination of bipolar and CMOS transistors to generate a precise and stable reference voltage. The internal circuitry compensates for temperature variations, ensuring accurate voltage output over a wide temperature range.

Detailed Application Field Plans

The LM385PSRE4-1-2 can be used in various electronic circuits that require a stable and accurate voltage reference. Some common application areas include:

1. Analog-to-Digital Converters (ADCs): The IC can provide a precise reference voltage for ADCs, ensuring accurate conversion of analog signals.
2. Voltage Regulators: It can be used as a reference voltage for voltage regulators, improving their stability and accuracy.
3. Sensor Calibration: The LM385PSRE4-1-2 can be employed to calibrate sensors that require a known and stable reference voltage.
4. Battery Management Systems: It can serve as a voltage reference for battery management systems, enabling accurate monitoring and control of battery charging and discharging processes.

Detailed and Complete Alternative Models

Some alternative models to the LM385PSRE4-1-2 include:

1. LM4040: A series of precision voltage references available in different output voltages and packages.
2. LT1021: A high-precision voltage reference IC with low temperature drift and noise.
3. REF30xx: A family of low-power, high-precision voltage references from Texas Instruments.

These alternative models offer similar functionality and can be considered based on specific application requirements.

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