LM385PSRG4-1-2

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 LM385PSRG4-1-2 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 LM385PSRG4-1-2 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

• Output Voltage: 1.225V
• Temperature Coefficient: 20ppm/°C
• Supply Voltage Range: 2.7V to 30V
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 120µA

Pin Configuration

The LM385PSRG4-1-2 has three pins arranged as follows:

```

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| | --| V+ |-- --| |-- |____| ```

Pin 1: V+ (Input voltage) Pin 2: GND (Ground) Pin 3: VOUT (Output voltage)

Functional Features

• Precise and stable output voltage reference
• Low temperature coefficient ensures accuracy over a wide temperature range
• Low power consumption minimizes energy usage
• Wide supply voltage range allows for versatile applications

Advantages

• High precision and stability
• Low temperature coefficient ensures accurate performance in varying temperatures
• Small form factor and surface-mount package enable space-saving designs
• Low power consumption extends battery life in portable devices

Disadvantages

• Limited output voltage options (1.225V for LM385PSRG4-1-2)
• Sensitive to supply voltage fluctuations
• Not suitable for high current applications

Working Principles

The LM385PSRG4-1-2 is based on a bandgap reference circuit that generates a stable and precise output voltage. It utilizes temperature-compensated components to minimize the effect of temperature variations on the output voltage. The IC operates by comparing the reference voltage with an external voltage source and adjusting its internal circuitry to maintain a constant output voltage.

Detailed Application Field Plans

The LM385PSRG4-1-2 finds applications in various fields, including:

1. Precision measurement instruments: Used as a voltage reference in multimeters, oscilloscopes, and other precision measurement devices.
2. Analog-to-digital converters (ADCs): Provides a stable reference voltage for accurate conversion of analog signals into digital data.
3. Power management circuits: Used as a voltage reference in power supply circuits to ensure stable and reliable operation.
4. Sensor calibration: Provides a precise reference voltage for calibrating sensors used in industrial and scientific applications.
5. Audio equipment: Used as a voltage reference in audio amplifiers and signal processing circuits to maintain accurate signal reproduction.

Detailed and Complete Alternative Models

1. LM4040: A series of precision voltage references available in different output voltages and package options.
2. LT1021: High precision voltage reference IC with low temperature coefficient and wide operating temperature range.
3. REF50xx: Voltage reference family with low noise and high accuracy suitable for precision applications.
4. MAX619: Low-power, low-voltage precision voltage reference IC with adjustable output voltage.

These alternative models offer similar functionality and can be considered as substitutes for the LM385PSRG4-1-2 depending on specific requirements.

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