Overview
The ADM693AR, manufactured by Analog Devices Inc., is a microprocessor supervisory circuit designed to provide comprehensive power supply monitoring and battery control functions in microprocessor systems. This IC is part of the ADM691A/ADM693A/ADM800L/M family and is specifically tailored for applications requiring precise voltage monitoring, reset functions, and battery backup switchover.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Operating Voltage Range (VCC) | 4.5 | 5.5 | V | ||
| Operating Voltage Range (VBATT) | 2.0 | 4.0 | V | ||
| Reset Voltage Threshold | 4.25 | 4.40 | 4.50 | V | |
| Reset Timeout Period (Internal Oscillator) | 140 | 200 | 280 | ms | |
| Watchdog Timeout Period (Internal Oscillator) | 1.0 | 1.6 | 2.25 | s | Long Period |
| 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 | |
| Package | 16-SOIC (0.295", 7.50mm Width) |
Key Features
- Precision Voltage Monitoring: The ADM693AR offers a precise voltage monitor with a reset threshold of 4.40 V and a tolerance of ±2%.
- Low Power Consumption: The IC has a low standby current of 1 µA, making it suitable for battery-powered systems.
- Automatic Battery Backup Power Switching: It automatically switches between the main power supply and a backup battery, ensuring continuous operation during power failures.
- Watchdog Timer: The device includes a watchdog timer with adjustable timeout periods, ensuring the system remains operational even if the microprocessor fails to reset the watchdog within the specified time.
- Chip Enable Gating: Fast onboard gating of chip enable signals is available, enhancing system control and stability.
Applications
- Microprocessor Systems: Ideal for monitoring and controlling power supplies in microprocessor-based systems.
- Computers and Controllers: Used in various computer and controller applications requiring robust power management.
- Intelligent Instruments: Suitable for intelligent instruments that need precise voltage monitoring and battery backup.
- Automotive Systems: Applied in automotive systems for critical power monitoring and control.
- Critical Power Monitoring: Used in applications where reliable power monitoring is crucial, such as in medical devices and industrial control systems.
Q & A
- What is the primary function of the ADM693AR?
The primary function of the ADM693AR is to provide power supply monitoring and battery control functions in microprocessor systems. - What is the operating voltage range for VCC in the ADM693AR?
The operating voltage range for VCC is 4.5 V to 5.5 V. - What is the reset voltage threshold for the ADM693AR?
The reset voltage threshold is 4.40 V. - Does the ADM693AR support battery backup switchover?
Yes, the ADM693AR supports automatic battery backup power switching. - What is the typical standby current of the ADM693AR?
The typical standby current is 1 µA. - What package type is the ADM693AR available in?
The ADM693AR is available in a 16-SOIC package. - What are the key applications of the ADM693AR?
The key applications include microprocessor systems, computers, controllers, intelligent instruments, and automotive systems. - Does the ADM693AR have a watchdog timer?
Yes, the ADM693AR includes a watchdog timer with adjustable timeout periods. - How does the ADM693AR handle power failures?
The ADM693AR automatically switches to a backup battery during power failures, ensuring continuous operation. - What is the significance of the chip enable gating feature in the ADM693AR?
The chip enable gating feature allows for fast onboard control of chip enable signals, enhancing system stability and control.
