ADM1811-5AKS-RL7

Product Overview

Category

ADM1811-5AKS-RL7 belongs to the category of voltage supervisors or reset ICs.

Use

This product is primarily used for monitoring the power supply voltage in electronic systems and ensuring proper system operation by generating a reset signal when the voltage falls below a specified threshold.

Characteristics

• Voltage Range: ADM1811-5AKS-RL7 operates within a voltage range of 1.8V to 5.5V.
• Low Power Consumption: It consumes very low power, making it suitable for battery-powered applications.
• Small Package Size: The IC comes in a small SOT-23 package, allowing for space-efficient designs.
• Precision Monitoring: It provides accurate voltage monitoring with a tight voltage threshold tolerance.
• Reset Time Delay: ADM1811-5AKS-RL7 offers an adjustable reset time delay to accommodate different system requirements.

Package and Quantity

ADM1811-5AKS-RL7 is available in a SOT-23 package. It is typically sold in reels containing a quantity of 3000 units.

Specifications

• Supply Voltage Range: 1.8V to 5.5V
• Reset Threshold Voltage: Adjustable from 1.6V to 4.63V
• Reset Timeout Period: Adjustable from 1ms to 640ms
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 2µA (typical)

Pin Configuration

The ADM1811-5AKS-RL7 IC has the following pin configuration:

_______ RESET | | GND | | VCC |_______| MR

• RESET: Output pin that generates the reset signal.
• GND: Ground reference pin.
• VCC: Power supply input pin.
• MR: Manual reset input pin (optional).

Functional Features

1. Voltage Monitoring: ADM1811-5AKS-RL7 continuously monitors the power supply voltage and compares it to the preset threshold voltage.
2. Reset Signal Generation: When the monitored voltage falls below the threshold, the IC generates a reset signal on the RESET pin.
3. Adjustable Threshold and Timeout: The threshold voltage and timeout period can be adjusted using external resistors and capacitors, allowing customization for different applications.
4. Manual Reset Option: The MR pin allows for manual reset functionality if required.

Advantages and Disadvantages

Advantages

• Reliable System Operation: Ensures proper system operation by monitoring the power supply voltage.
• Low Power Consumption: Consumes minimal power, making it suitable for battery-powered devices.
• Small Package Size: Compact SOT-23 package enables space-efficient designs.
• Adjustable Parameters: Threshold voltage and timeout period can be customized for specific application requirements.

Disadvantages

• Lack of Built-in Hysteresis: The IC does not provide built-in hysteresis, which may require additional external components for noise immunity.

Working Principles

ADM1811-5AKS-RL7 operates based on a voltage comparator circuit. It compares the power supply voltage with the preset threshold voltage. If the voltage drops below the threshold, the IC triggers the reset signal, indicating a power failure or unstable voltage condition. The reset signal remains active until the voltage rises above the threshold and the timeout period elapses.

Application Field Plans

ADM1811-5AKS-RL7 finds applications in various electronic systems where reliable power supply monitoring is crucial. Some potential application fields include:

1. Microcontrollers and Microprocessors: Ensures stable operation by resetting the system when the power supply voltage drops below the specified level.
2. Communication Systems: Monitors the voltage to prevent data corruption or system malfunction during power fluctuations.
3. Industrial Control Systems: Provides reliable reset functionality for critical control systems, preventing unpredictable behavior due to voltage instability.
4. Automotive Electronics: Ensures proper operation of automotive electronic modules by monitoring the power supply voltage and generating resets when necessary.

Alternative Models

1. ADM1812-5AKS-RL7: Similar to ADM1811-5AKS-RL7 but with a different reset timeout period range.
2. MAX811T: Voltage supervisor IC with adjustable threshold voltage and built-in hysteresis.
3. TPS3808G01: Precision voltage supervisor with adjustable threshold voltage and manual reset option.

These alternative models offer similar functionality and can be considered as substitutes depending on specific requirements.

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