LM385Z-2.5G

Product Overview

Category

The LM385Z-2.5G belongs to the category of voltage references.

Use

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

Characteristics

• Voltage Reference: The LM385Z-2.5G provides a stable and precise output voltage of 2.5V.
• Low Power Consumption: It operates at low power, making it suitable for battery-powered applications.
• High Accuracy: The LM385Z-2.5G offers high accuracy with low temperature coefficient and long-term stability.
• Wide Temperature Range: It can operate within a wide temperature range, typically from -40°C to +85°C.
• Low Output Impedance: The device has a low output impedance, enabling it to drive loads efficiently.

Package

The LM385Z-2.5G is available in a TO-92 package, which is a small plastic package with three leads.

Essence

The essence of LM385Z-2.5G lies in its ability to provide a stable and accurate reference voltage for precise circuit operation.

Packaging/Quantity

The LM385Z-2.5G is typically packaged in reels or tubes, containing a specific quantity of devices per package.

Specifications

• Output Voltage: 2.5V
• Initial Accuracy: ±0.5%
• Temperature Coefficient: 100 ppm/°C
• Operating Temperature Range: -40°C to +85°C
• Supply Voltage Range: 1.9V to 5.5V
• Quiescent Current: 120 µA (typical)

Detailed Pin Configuration

The LM385Z-2.5G has three pins:

1. Vout: This pin provides the regulated output voltage of 2.5V.
2. GND: This pin is connected to the ground reference.
3. Vin: This pin is connected to the input supply voltage.

Functional Features

• Voltage Regulation: The LM385Z-2.5G maintains a constant output voltage of 2.5V, regardless of changes in the input voltage or load conditions.
• Low Power Consumption: It consumes low power, making it suitable for battery-powered applications where power efficiency is crucial.
• Stability: The LM385Z-2.5G offers excellent long-term stability and low temperature coefficient, ensuring consistent performance over time and varying temperatures.
• Load Driving Capability: With its low output impedance, it can efficiently drive loads without significant voltage drop.

Advantages and Disadvantages

Advantages

• Precise and stable output voltage
• Low power consumption
• Wide operating temperature range
• Small package size
• Low output impedance

Disadvantages

• Limited output voltage options (fixed at 2.5V)
• Not suitable for applications requiring higher output voltages

Working Principles

The LM385Z-2.5G utilizes a bandgap voltage reference circuit to generate a precise and stable output voltage. It compensates for temperature variations by employing a temperature-dependent current source and a voltage divider network. This ensures that the output voltage remains constant even with changes in temperature and input voltage.

Detailed Application Field Plans

The LM385Z-2.5G finds applications in various electronic circuits, including but not limited to:

1. Precision Analog Circuits: It is used as a voltage reference in precision analog-to-digital converters, digital-to-analog converters, and operational amplifiers to ensure accurate and reliable signal processing.
2. Battery-Powered Devices: Due to its low power consumption, it is commonly employed in battery-powered devices such as portable instruments, sensors, and handheld communication devices.
3. Industrial Control Systems: The LM385Z-2.5G is utilized in industrial control systems to provide stable reference voltages for precise measurements and control operations.
4. Automotive Electronics: It finds applications in automotive electronics, including engine control units, dashboard displays, and sensor interfaces, where accurate voltage references are essential.

Detailed and Complete Alternative Models

1. LM4040: This series of voltage references offers various output voltage options with high accuracy and low temperature coefficient.
2. LT6654: It provides a wide range of output voltages with excellent long-term stability and low noise performance.
3. REF30xx: These voltage references offer low dropout voltage and high accuracy, making them suitable for low-power applications.

These alternative models can be considered based on specific requirements and desired features.

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