Overview
The ADM693AARN is a microprocessor supervisory circuit produced by Analog Devices Inc. It is part of the ADM693A family, designed to provide comprehensive power supply monitoring and battery control functions in microprocessor systems. This device integrates multiple essential functions, including microprocessor reset, watchdog timer, battery backup switchover, and power failure warning. The ADM693AARN is available in a 16-pin SOIC package and operates over a temperature range of –40°C to +85°C.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| VCC Operating Voltage Range | 4.5 | 5.5 | V | ||
| VBATT Operating Voltage Range | 2.0 | 4.0 | V | ||
| Reset Threshold | 4.4 | V ± 3% | |||
| Watchdog Timeout Period | 100 ms, 1.6 s, Adjustable | ||||
| Battery Backup Switching | Yes | ||||
| Chip Enable Signals | Yes | ||||
| Supply Current (Excludes IOUT) | 1 | 1.95 | mA | IOUT = 100 mA | |
| Battery Standby Current | 0.6 | 1 | µA | VCC = 0 V, VBATT = 2.8 V |
Key Features
- Low Power Consumption: The device has a low standby current of 1 µA, making it suitable for battery-powered systems.
- Precision Voltage Monitor: The reset threshold has a ±3% tolerance, ensuring reliable operation.
- Watchdog Timer: The watchdog timer monitors the microprocessor's activity to prevent it from getting stuck in an indefinite loop.
- Battery Backup Switchover: Automatically switches between VCC and VBATT to ensure continuous operation during power failures.
- Chip Enable Signals: Provides onboard gating of chip enable signals.
- Adjustable Reset and Watchdog Timeout: Allows for customizable reset and watchdog timeout periods.
- Power Failure Warning: Generates a power failure warning signal.
Applications
- Microprocessor Systems: Ideal for monitoring and controlling power supplies in microprocessor-based systems.
- Computers and Controllers: Used in various computer and controller applications to ensure reliable power supply monitoring.
- Intelligent Instruments: Suitable for intelligent instruments that require precise power supply management.
- Automotive Systems: Applied in automotive systems for critical power monitoring and control.
Q & A
- What is the operating voltage range for VCC in the ADM693AARN?
The operating voltage range for VCC is 4.5 V to 5.5 V.
- What is the reset threshold voltage for the ADM693AARN?
The reset threshold voltage is 4.4 V ± 3%.
- Does the ADM693AARN support battery backup switchover?
Yes, the device supports automatic battery backup switchover.
- What is the typical supply current for the ADM693AARN?
The typical supply current is between 1 mA and 1.95 mA, excluding IOUT).
- What is the purpose of the watchdog timer in the ADM693AARN?
The watchdog timer monitors the microprocessor's activity to prevent it from getting stuck in an indefinite loop).
- What package type is the ADM693AARN available in?
The device is available in a 16-pin SOIC package).
- What is the temperature range for the ADM693AARN?
The operating temperature range is –40°C to +85°C).
- Does the ADM693AARN provide power failure warning signals?
Yes, the device generates power failure warning signals).
- Can the reset and watchdog timeout periods be adjusted in the ADM693AARN?
Yes, the reset and watchdog timeout periods are adjustable).
- What are some common applications of the ADM693AARN?
Common applications include microprocessor systems, computers, controllers, intelligent instruments, and automotive systems).
