ADM811SART-REEL7

Product Overview

Category

The ADM811SART-REEL7 belongs to the category of integrated circuits (ICs).

Use

This product is commonly used in electronic devices for voltage monitoring and reset functions.

Characteristics

• Voltage monitoring: The ADM811SART-REEL7 is designed to monitor the power supply voltage and provide a reset signal when it falls below a specified threshold.
• Reset function: It ensures that the microcontroller or other digital circuitry starts operating only when the power supply voltage reaches a stable level.
• Low power consumption: The device operates with low quiescent current, making it suitable for battery-powered applications.
• Small package size: The ADM811SART-REEL7 is available in a compact SOT-23 package, allowing for space-efficient integration into various electronic designs.

Package and Quantity

The ADM811SART-REEL7 is packaged in a SOT-23-3 package. It is typically sold in reels containing a quantity of 3000 units.

Specifications

• Supply Voltage Range: 1.6V to 5.5V
• Threshold Voltage Options: 2.63V, 2.93V, 3.08V, 4.38V
• Reset Timeout Period: 140ms (typical)
• Quiescent Current: 8µA (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The ADM811SART-REEL7 has three pins arranged as follows:

```

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| | --| VCC | --| /RESET| --| GND | |_______| ```

• VCC: Power supply input pin.
• /RESET: Active-low reset output pin.
• GND: Ground reference pin.

Functional Features

1. Voltage Monitoring: The ADM811SART-REEL7 continuously monitors the supply voltage and compares it to the preset threshold voltage.
2. Reset Generation: When the supply voltage drops below the threshold, the /RESET pin is asserted low, indicating a reset condition.
3. Reset Timeout: After power-up or when the supply voltage rises above the threshold, the /RESET pin remains low for a fixed timeout period to ensure a stable power supply before releasing the reset signal.
4. Manual Reset Input: The device includes an additional MR (manual reset) input pin that allows an external signal to force a reset condition.

Advantages and Disadvantages

Advantages

• Reliable Power-On Reset: Ensures proper initialization of microcontrollers and digital circuits.
• Low Power Consumption: Suitable for battery-powered applications, extending battery life.
• Small Package Size: Enables space-efficient integration into compact electronic designs.
• Wide Supply Voltage Range: Compatible with various power supply configurations.

Disadvantages

• Lack of Adjustable Threshold: The ADM811SART-REEL7 offers fixed threshold voltage options, limiting flexibility in certain applications.
• Single Reset Timeout Period: The device has a fixed timeout period, which may not be optimal for all system requirements.

Working Principles

The ADM811SART-REEL7 operates based on a voltage comparator circuit. It continuously compares the supply voltage with the preset threshold voltage. When the supply voltage falls below the threshold, the reset output is activated, indicating a reset condition. The reset signal remains active for a fixed timeout period after power-up or until the supply voltage rises above the threshold, ensuring a stable power supply before releasing the reset.

Application Field Plans

The ADM811SART-REEL7 finds application in various electronic devices where reliable voltage monitoring and reset functionality are crucial. Some potential application fields include:

1. Microcontroller Systems: Ensures proper initialization and reliable operation of microcontrollers in embedded systems.
2. Industrial Control Systems: Provides voltage monitoring and reset functionality for control units in industrial automation applications.
3. Consumer Electronics: Enables safe power-up and reset functions in devices such as smart home appliances, audio/video equipment, and gaming consoles.
4. Medical Devices: Ensures reliable operation and safe power-on reset in medical equipment, such as patient monitors and diagnostic devices.

Alternative Models

1. ADM803/ADM809: These ICs offer similar voltage monitoring and reset functions with adjustable threshold options.
2. MAX811/MAX813: These devices provide voltage monitoring and reset features with additional manual reset input and adjustable timeout periods.
3. MCP101/MCP102: These ICs offer voltage monitoring and reset functionality with low power consumption and adjustable threshold options.

These alternative models provide flexibility in terms of threshold voltage adjustment, additional features, and compatibility with specific application requirements.

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