ADM809SART-REEL

Product Overview

Category

ADM809SART-REEL belongs to the category of voltage supervisors or reset ICs.

Use

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

Characteristics

• Voltage monitoring range: The ADM809SART-REEL can monitor voltages in the range of 1.2V to 5.0V.
• Low power consumption: This IC consumes very low power, making it suitable for battery-powered applications.
• Precision voltage threshold: It has a precise voltage threshold with a typical accuracy of ±1.8%.
• Reset timeout period: The reset signal remains active for a fixed duration after the voltage rises above the threshold, typically 140ms.
• Power-on reset delay: The ADM809SART-REEL provides a power-on reset delay of typically 100ms to allow stable power supply voltage before releasing the reset signal.

Package

The ADM809SART-REEL is available in a small SOT-23 package, which is compact and suitable for space-constrained applications.

Essence

The essence of ADM809SART-REEL lies in its ability to monitor the power supply voltage and generate a reset signal to ensure reliable system operation.

Packaging/Quantity

This product is typically packaged in reels containing a specific quantity of ICs, such as 3000 units per reel.

Specifications

• Supply Voltage Range: 1.2V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Reset Threshold Accuracy: ±1.8%
• Reset Timeout Period: 140ms (typical)
• Power-On Reset Delay: 100ms (typical)

Pin Configuration

The ADM809SART-REEL has three pins:

1. VCC: Power supply input pin.
2. GND: Ground reference pin.
3. RESET: Output pin for the reset signal.

Functional Features

The ADM809SART-REEL offers the following functional features:

1. Voltage Monitoring: It continuously monitors the power supply voltage and compares it with a fixed threshold.
2. Reset Signal Generation: When the voltage falls below the threshold, it generates a reset signal to initiate system reset or recovery.
3. Precision Threshold: The IC maintains a precise voltage threshold, ensuring accurate monitoring.
4. Power-On Reset Delay: It provides a delay after power-on to allow the power supply voltage to stabilize before releasing the reset signal.
5. Reset Timeout: The reset signal remains active for a fixed duration after the voltage rises above the threshold, preventing premature system operation during power-up transients.

Advantages and Disadvantages

Advantages

• Wide operating voltage range allows compatibility with various systems.
• Low power consumption makes it suitable for battery-powered applications.
• Small package size enables use in space-constrained designs.
• Accurate voltage threshold ensures reliable monitoring.

Disadvantages

• Lack of adjustable threshold limits customization options.
• Limited timeout period may not be suitable for certain applications requiring longer reset durations.

Working Principles

The ADM809SART-REEL operates by comparing the power supply voltage with a fixed threshold. When the voltage falls below the threshold, the internal circuitry generates a reset signal. This signal remains active for a fixed duration after the voltage rises above the threshold, preventing premature system operation during power-up transients. The power-on reset delay feature ensures that the reset signal is released only after the power supply voltage stabilizes.

Application Field Plans

The ADM809SART-REEL finds application in various electronic systems where reliable power supply monitoring and system reset functionality are crucial. Some potential application fields include:

1. Microcontrollers: Ensuring proper system initialization and preventing erratic behavior during power-up.
2. Industrial Control Systems: Monitoring power supply voltage to prevent damage or data corruption in critical control systems.
3. Automotive Electronics: Providing reliable reset functionality for microcontrollers and other components in automotive applications.
4. Battery-Powered Devices: Protecting battery life by initiating a reset when the voltage drops below a certain threshold.

Alternative Models

There are several alternative models available that offer similar functionality to the ADM809SART-REEL. Some notable alternatives include:

1. MAX809: Manufactured by Maxim Integrated, this series of voltage supervisors offers various threshold options and package sizes.
2. MCP101: Produced by Microchip Technology, this family of reset ICs provides adjustable threshold voltages and additional features like manual reset input.
3. TPS3808: Texas Instruments manufactures this series of voltage supervisors with adjustable threshold voltages and extended timeout periods.

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

In conclusion, the ADM809SART-REEL is a voltage supervisor IC that plays a