Overview
The ADM691AANZ is a microprocessor supervisory circuit produced by Analog Devices Inc. This component is designed to provide comprehensive power supply monitoring and battery control functions in microprocessor systems. It offers features such as power-on reset, battery backup switching, watchdog timer, and power-failure warning, making it an essential component for ensuring the reliability and stability of microprocessor-based systems.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Comments |
|---|---|---|---|---|---|
| Supply Voltage | 4.75 | - | 5.5 | V | VCC range |
| Operating Supply Current | - | 1.95 | 1.95 | mA | Nominal supply current |
| Reset Threshold Voltage | 4.5 | 4.65 | 4.75 | V | ADM691A reset threshold |
| Reset Timeout Period | 140 | - | 280 | ms | Internal oscillator |
| Watchdog Timeout Period | 70 | - | 140 | ms | Short period, internal oscillator |
| Package Type | - | - | - | DIP-16 | Through-hole package |
| Pin Count | - | - | - | 16 | Number of pins |
| Power Dissipation | - | - | 600 | mW | Maximum power dissipation |
Key Features
- Power-on Reset: Provides a reset output during power-up, power-down, and brownout conditions, ensuring the microprocessor starts in a known state.
- 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 optional watchdog timer has not been toggled within a specified time, preventing system lockups.
- Precision Voltage Monitoring: Monitors the supply voltage with a ±2% tolerance, ensuring accurate detection of undervoltage conditions.
- Low Power Consumption: Operates with a low standby current, making it suitable for battery-powered systems.
- Multiple Package Options: Available in 16-pin DIP and SO packages, with the ADM691A also available in a space-saving TSSOP package.
Applications
- Microprocessor Systems: Ensures reliable operation of microprocessors by monitoring power supply and providing reset and backup functions.
- Computers and Controllers: Used in various computer and control systems to manage power supply and prevent system failures.
- Intelligent Instruments: Suitable for use in intelligent instruments that require precise power monitoring and control.
- Automotive Systems: Applied in automotive systems for critical power monitoring and battery backup functions.
- Critical Power Monitoring: Used in applications where reliable power supply monitoring is crucial, such as in medical devices and industrial control systems.
Q & A
- What is the primary function of the ADM691AANZ?
The primary function of the ADM691AANZ is to provide power supply monitoring and battery control functions for microprocessor systems, including power-on reset, battery backup switching, and watchdog timer capabilities.
- What is the supply voltage range for the ADM691AANZ?
The supply voltage range for the ADM691AANZ is from 4.75V to 5.5V.
- What types of packages are available for the ADM691AANZ?
The ADM691AANZ is available in 16-pin DIP and SO packages, with the ADM691A also available in a TSSOP package.
- What is the reset threshold voltage for the ADM691AANZ?
The reset threshold voltage for the ADM691AANZ is between 4.5V and 4.75V.
- Does the ADM691AANZ support watchdog timer functionality?
- What is the maximum power dissipation of the ADM691AANZ?
The maximum power dissipation of the ADM691AANZ is 600mW.
- Is the ADM691AANZ RoHS compliant?
- What are the typical applications of the ADM691AANZ?
The ADM691AANZ is typically used in microprocessor systems, computers, controllers, intelligent instruments, and automotive systems for critical power monitoring).
- How does the ADM691AANZ handle battery backup switching?
The ADM691AANZ automatically switches to battery backup for CMOS RAM, CMOS microprocessors, or other low-power logic when the main power supply fails).
- What is the operating supply current of the ADM691AANZ?
The nominal operating supply current of the ADM691AANZ is 1.95mA).
