ADM809SAKS-REEL

Product Overview

Category

ADM809SAKS-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 ADM809SAKS-REEL can monitor voltages in the range of 1.2V to 5.0V.
• Reset timeout period: It has a fixed reset timeout period of typically 140ms.
• Low power consumption: This IC consumes very low power, making it suitable for battery-powered applications.
• Small package size: The ADM809SAKS-REEL is available in a small SOT-23 package, which saves board space.
• High accuracy: It provides accurate voltage monitoring with a typical threshold accuracy of ±1.8%.

Package and Quantity

The ADM809SAKS-REEL is packaged in a SOT-23 package. It is typically supplied in reels containing a specific quantity, such as 3000 units per reel.

Specifications

• Supply Voltage Range: 1.2V to 5.5V
• Reset Threshold Voltage Options: 2.93V, 3.08V, 3.15V, 4.38V, 4.63V, 4.75V (typical)
• Reset Timeout Period: 140ms (typical)
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 7µA (typical)

Pin Configuration

The ADM809SAKS-REEL has three pins:

1. VCC: Power supply input pin.
2. GND: Ground reference pin.
3. RESET: Output pin that generates a reset signal when the monitored voltage falls below the threshold.

Functional Features

• Voltage Monitoring: The ADM809SAKS-REEL continuously monitors the supply voltage.
• Reset Generation: When the voltage drops below the specified threshold, it generates a reset signal to initiate system reset.
• Fixed Timeout Period: It provides a fixed timeout period for the reset signal, ensuring sufficient time for the system to stabilize before resuming operation.
• Manual Reset Input: The IC also includes a manual reset input pin that allows an external signal to force a system reset.

Advantages and Disadvantages

Advantages

• Wide operating voltage range enables compatibility with various electronic systems.
• Small package size saves board space.
• Low power consumption is ideal for battery-powered applications.
• Accurate voltage monitoring ensures reliable system operation.

Disadvantages

• Fixed reset timeout period may not be suitable for all applications requiring different timeout durations.
• Limited reset threshold voltage options may not cover all voltage monitoring requirements.

Working Principles

The ADM809SAKS-REEL operates by comparing the supply voltage with a fixed threshold voltage. When the supply voltage drops below the threshold, the internal circuitry triggers the RESET pin, generating a reset signal. This signal remains active for the fixed timeout period, allowing the system to reset and stabilize before resuming normal operation.

Application Field Plans

The ADM809SAKS-REEL finds applications in various electronic systems where voltage monitoring and system reset functionality are crucial. Some potential application fields include:

1. Microcontrollers and Microprocessors: Ensuring proper system initialization and preventing erratic behavior due to voltage fluctuations.
2. Industrial Control Systems: Providing reliable reset functionality to maintain system integrity during power supply variations.
3. Automotive Electronics: Monitoring critical voltages to prevent malfunctions and ensure safe operation of vehicle systems.
4. Battery-Powered Devices: Protecting battery life by initiating a reset when the voltage drops below a certain level.

Alternative Models

1. ADM811: This IC offers similar voltage monitoring and reset functionality with adjustable timeout periods.
2. MAX809: Provides voltage monitoring and reset generation with additional features like manual reset input and adjustable threshold voltages.

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

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