Overview
The ADM691AARW, produced 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/ADM800M family and offers a single-chip solution for various power management needs. It includes features such as power-on reset, battery backup switching, watchdog timer, and power failure warning, making it essential for ensuring the correct operation and reliability of electronic systems.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Operating Voltage Range (VCC) | 4.75 | 5.5 | V | ||
| Operating Voltage Range (VBATT) | 2.0 | 4.25 | V | ||
| Reset Time | 200 ms or Adjustable | ||||
| Reset Threshold | 4.65 V ± 3% | ||||
| Watchdog Timeout Period | 100 ms, 1.6 s, Adjustable | ||||
| Battery Backup Switching | Yes | ||||
| Chip Enable Signals | Yes | ||||
| Package Type | SOIC-16 | ||||
| Operating Temperature Range | -40°C | 85°C | °C |
Key Features
- Power-on Reset Output: Provides a reset signal during power-up, power-down, and brownout conditions, remaining operational with VCC as low as 1 V.
- Battery Backup Switching: Automatically switches to battery backup for CMOS RAM, CMOS microprocessors, or other low-power logic when the main power supply fails.
- Watchdog Timer: Generates a reset pulse if the watchdog timer is not toggled within a specified time, with adjustable timeout periods.
- Power Failure Warning: Includes a 1.25 V threshold detector for power fail warning, low battery detection, or monitoring other power supplies.
- Low Power Consumption: Features low standby current and automatic battery backup power switching.
- Chip Enable Signals: Provides onboard gating of chip enable signals.
- Package Options: Available in 16-pin DIP, SO, and TSSOP packages.
Applications
- Microprocessor Systems: Ideal for monitoring and managing power in microprocessor-based systems.
- Computers and Controllers: Ensures reliable power supply and backup in computer systems and industrial controllers.
- Intelligent Instruments: Used in various intelligent instruments to provide stable power supply and backup functions.
- Automotive Systems: Provides stable voltage output and manages power supply in automotive electronics.
- Portable Electronics: Suitable for smartwatches, tablets, and other portable electronics requiring efficient power management.
- Industrial Production: Used in sensors, actuators, and controllers to enable precise control of devices.
Q & A
- What is the primary function of the ADM691AARW?
The primary function of the ADM691AARW is to provide power supply monitoring and battery control functions in microprocessor systems.
- What are the key features of the ADM691AARW?
The key features include power-on reset output, battery backup switching, watchdog timer, power failure warning, and low power consumption.
- What is the operating voltage range for VCC and VBATT?
The operating voltage range for VCC is 4.75 V to 5.5 V, and for VBATT it is 2.0 V to 4.25 V.
- What types of packages are available for the ADM691AARW?
The ADM691AARW is available in 16-pin DIP, SO, and TSSOP packages.
- What is the operating temperature range of the ADM691AARW?
The operating temperature range is -40°C to 85°C.
- How does the watchdog timer function in the ADM691AARW?
The watchdog timer generates a reset pulse if it is not toggled within a specified time, with adjustable timeout periods of 100 ms, 1.6 s, or adjustable.
- What is the purpose of the battery backup switching feature?
The battery backup switching feature automatically switches to battery backup for CMOS RAM, CMOS microprocessors, or other low-power logic when the main power supply fails.
- In which applications is the ADM691AARW commonly used?
The ADM691AARW is commonly used in microprocessor systems, computers, controllers, intelligent instruments, automotive systems, portable electronics, and industrial production.
- What is the significance of the power failure warning feature?
The power failure warning feature includes a 1.25 V threshold detector for power fail warning, low battery detection, or monitoring other power supplies.
- How does the ADM691AARW manage chip enable signals?
The ADM691AARW provides onboard gating of chip enable signals.
