ADM809-5LAKS-REEL

Product Overview

Category

ADM809-5LAKS-REEL belongs to the category of electronic components, specifically voltage supervisors or reset ICs.

Use

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

Characteristics

• Voltage monitoring range: 2.93V to 5.5V
• Reset threshold accuracy: ±1.8%
• Low quiescent current: 7µA (typical)
• Power-on reset delay time: 140ms (typical)
• Active-low reset output
• Small package size: SOT-23-3
• RoHS compliant

Package and Quantity

ADM809-5LAKS-REEL is available in a SOT-23-3 package. It is typically sold in reels containing a specified quantity of units, commonly 3000 pieces per reel.

Specifications

• Supply Voltage Range: 1.1V to 6.0V
• Operating Temperature Range: -40°C to +85°C
• Reset Threshold Options: 2.93V, 3.08V, 3.3V, 4.38V, 4.63V, 4.75V, 4.88V, 5.0V, 5.13V, 5.25V, 5.38V, 5.50V
• Reset Timeout Options: 140ms, 560ms, 1120ms, 2240ms

Pin Configuration

ADM809-5LAKS-REEL has three pins arranged as follows:

```

---

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

• VCC: Power supply input pin (1.1V to 6.0V)
• /RESET: Active-low reset output
• GND: Ground reference

Functional Features

ADM809-5LAKS-REEL offers the following functional features:

1. Voltage Monitoring: It continuously monitors the power supply voltage and compares it with the preset threshold.
2. Reset Generation: When the voltage falls below the threshold, it generates an active-low reset signal.
3. Power-On Reset Delay: It provides a delay of approximately 140ms after power-up before generating the reset signal, allowing the system to stabilize.

Advantages and Disadvantages

Advantages

• Wide operating voltage range allows compatibility with various systems.
• Accurate reset threshold ensures reliable operation.
• Low quiescent current minimizes power consumption.
• Small package size enables space-saving designs.
• RoHS compliance promotes environmental friendliness.

Disadvantages

• Limited reset timeout options may not suit all application requirements.
• Lack of adjustable reset threshold limits flexibility in certain scenarios.

Working Principles

ADM809-5LAKS-REEL 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 internal circuitry triggers the generation of an active-low reset signal. This signal remains active until the voltage rises above the threshold and the power-on reset delay time elapses.

Application Field Plans

ADM809-5LAKS-REEL finds applications in various electronic systems where reliable voltage monitoring and reset functionality are crucial. Some potential application fields include:

1. Microcontrollers and Microprocessors: Ensuring proper system initialization and preventing erratic behavior during power fluctuations.
2. Communication Systems: Maintaining stable operation by resetting the system when the power supply voltage drops.
3. Industrial Control Systems: Preventing data corruption and ensuring system integrity during power disturbances.
4. Automotive Electronics: Protecting sensitive components from voltage fluctuations and enabling safe system restarts.

Alternative Models

For those seeking alternative options, the following models provide similar functionality:

1. MAX809: Manufactured by Maxim Integrated, available in various package options.
2. MCP100: Produced by Microchip Technology, offers adjustable reset threshold.
3. TPS3808: Texas Instruments' offering with additional power supply glitch immunity.

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

In conclusion, ADM809-5LAKS-REEL is a voltage supervisor IC that provides reliable power supply monitoring and reset generation. Its compact size, low power consumption, and accurate threshold make it suitable for a wide range of electronic systems. However, limited reset timeout options and fixed threshold may pose limitations in certain applications.