ADM8693AN

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High-performance voltage supervisor with watchdog timer
• Package: 8-pin plastic dual in-line package (PDIP)
• Essence: Monolithic integrated circuit designed to monitor the power supplies in microprocessor and digital systems
• Packaging/Quantity: Available in tubes or tape and reel, quantity depends on supplier

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Watchdog Timer Timeout Period: Adjustable from 6.4ms to 1.6s
• Reset Threshold Voltage Options: 4.63V, 4.38V, 4.00V, 2.93V, or adjustable
• Power-On Reset Delay Time: 200ms typical
• Quiescent Current: 25µA typical

Detailed Pin Configuration

The ADM8693AN has the following pin configuration:

1. VCC: Supply voltage input
2. GND: Ground reference
3. MR: Manual reset input
4. RESET: Active-low reset output
5. WDI: Watchdog input
6. CT: Capacitor connection for watchdog timeout period adjustment
7. ADJ: Reset threshold voltage adjustment
8. NC: No connection

Functional Features

• Voltage monitoring: Monitors the supply voltage and asserts a reset signal if it falls below the specified threshold.
• Watchdog Timer: Provides a mechanism to detect and recover from software or hardware failures by resetting the system if a periodic input signal is not received within the specified timeout period.
• Manual Reset: Allows the system to be reset manually using an external signal.
• Adjustable Reset Threshold: The reset threshold voltage can be adjusted to suit different system requirements.
• Power-On Reset: Generates a reset signal during power-up to ensure a controlled start-up.

Advantages and Disadvantages

Advantages: - High-performance voltage supervision - Wide supply voltage range - Adjustable reset threshold - Power-on reset functionality - Compact 8-pin package

Disadvantages: - Limited number of available reset threshold voltage options - No internal pull-up resistor for the WDI pin

Working Principles

The ADM8693AN monitors the supply voltage using an internal voltage reference and comparator. If the supply voltage falls below the set threshold, the reset output is asserted, indicating a power failure. The watchdog timer operates by monitoring the WDI input for periodic signals. If the WDI signal is not received within the specified timeout period, the reset output is activated, resetting the system.

Detailed Application Field Plans

The ADM8693AN is commonly used in microprocessor-based systems, digital systems, and other applications where reliable power management and system reset functionality are required. Some specific application areas include:

1. Embedded Systems: Provides power supply monitoring and reset functionality for microcontroller-based embedded systems.
2. Industrial Automation: Ensures reliable operation and system recovery in industrial automation equipment.
3. Medical Devices: Monitors power supplies in medical devices, ensuring safe and controlled operation.
4. Automotive Electronics: Used in automotive electronic control units (ECUs) to monitor power supply integrity and provide system reset capability.

Detailed and Complete Alternative Models

1. ADM8691AN: Similar to ADM8693AN but with fixed reset threshold voltage options.
2. ADM8692AN: Similar to ADM8693AN but without the watchdog timer functionality.
3. ADM8694AN: Enhanced version with additional features such as adjustable watchdog timeout period and power-fail comparator.

Note: This is not an exhaustive list, and there may be other alternative models available from different manufacturers.

Word count: 529 words