ADM1181AAN

Product Overview

Category

ADM1181AAN belongs to the category of integrated circuits (ICs).

Use

The ADM1181AAN is commonly used as a power supply supervisor and watchdog timer in various electronic devices.

Characteristics

• Power supply supervisor with watchdog timer functionality
• Monitors voltage levels and resets the system if necessary
• Provides protection against power supply faults
• Can be programmed for different voltage thresholds and time intervals
• Low power consumption
• Compact package size

Package

ADM1181AAN is available in a small outline integrated circuit (SOIC) package.

Essence

The essence of ADM1181AAN lies in its ability to monitor power supply voltages and ensure the proper functioning of electronic systems.

Packaging/Quantity

ADM1181AAN is typically sold in reels or tubes, with each reel/tube containing a specific quantity of ICs. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Watchdog Timer Timeout Period: Programmable (1.6s to 102.4s)
• Reset Threshold Voltage: Programmable (2.55V to 4.63V)
• Quiescent Current: 25µA (typical)

Detailed Pin Configuration

ADM1181AAN has a total of 8 pins:

1. VCC: Power supply input
2. GND: Ground reference
3. RESET: Active-low reset output
4. MR: Master reset input
5. WDI: Watchdog timer input
6. TOUT: Watchdog timeout output
7. VDD: Power supply input for internal logic
8. NC: No connection (unused pin)

Functional Features

1. Power Supply Monitoring: ADM1181AAN continuously monitors the voltage levels of the power supply and generates a reset signal if the voltage falls below a programmable threshold.
2. Watchdog Timer: The integrated watchdog timer ensures that the system remains operational by periodically resetting it within a programmable time interval.
3. Fault Protection: ADM1181AAN provides protection against power supply faults such as overvoltage, undervoltage, and power loss, preventing potential damage to the electronic system.
4. Programmability: The device can be programmed to adjust the voltage threshold and watchdog timeout period according to specific system requirements.

Advantages and Disadvantages

Advantages

• Reliable power supply monitoring and reset functionality
• Flexible programmability for different system configurations
• Compact package size allows for easy integration into various electronic devices
• Low power consumption helps conserve energy

Disadvantages

• Limited number of pins may restrict the device's compatibility with certain system designs
• Requires careful programming to ensure optimal performance

Working Principles

ADM1181AAN operates by continuously monitoring the voltage level of the power supply using an internal voltage comparator. If the voltage falls below the programmed threshold, the device generates a reset signal to restart the system. Additionally, the watchdog timer periodically receives a signal from the system, and if this signal is not received within the programmed time interval, the device triggers a system reset.

Detailed Application Field Plans

ADM1181AAN finds applications in various electronic systems where reliable power supply monitoring and system reset functionality are crucial. Some potential application fields include:

1. Industrial Control Systems: Used to monitor power supply voltages in control panels and machinery, ensuring uninterrupted operation.
2. Automotive Electronics: Integrated into automotive systems to protect against power supply faults and ensure proper functioning of critical components.
3. Medical Devices: Employed in medical equipment to monitor power supply integrity and provide system reset capabilities in case of voltage fluctuations.
4. Consumer Electronics: Integrated into electronic devices such as smartphones, tablets, and gaming consoles to enhance system reliability.

Detailed and Complete Alternative Models

1. ADM1185AAN: Similar to ADM1181AAN but with additional features such as power-on reset and adjustable watchdog timeout period.
2. MAX16054AUB+: Offers similar power supply monitoring and watchdog timer functionality with enhanced programmability options.
3. TPS3839K33DBVR: Provides power supply supervision and reset generation with a fixed threshold voltage and adjustable watchdog timeout period.

Please note that the above alternative models are just a few examples, and there are several other ICs available in the market with similar functionalities.

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