Overview
The ADM691AARW-REEL, produced by Analog Devices Inc., is a part of the ADM691A/ADM693A/ADM800L/ADM800M family of supervisory circuits. These circuits provide comprehensive single-chip solutions for power supply monitoring and battery control in microprocessor systems. The ADM691A is designed to offer robust power management features, including power-on reset, battery backup switchover, watchdog timer, and power-failure warning. This component is particularly useful in ensuring the reliable operation of microprocessors under various power conditions.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Operating Voltage Range (VCC) | 4.75 | - | 5.5 | V | - |
| Reset Voltage Threshold | 4.5 | 4.65 | 4.75 | V | VCC Falling, TA = +25°C |
| Reset Threshold Hysteresis | - | - | 15 mV | - | - |
| VCC to RESET Delay | - | - | 80 µs | - | - |
| Power Down LOW LINE to RESET Delay | - | - | 800 ns | - | - |
| Reset Timeout Period (Internal Oscillator) | 140 | 200 | 280 ms | - | Power Up |
| Watchdog Timeout Period (Internal Oscillator) | 1.0 | 1.6 | 2.25 s | - | Long Period |
| Minimum WDI Input Pulse Width | - | - | 100 ns | - | - |
| Package Type | - | - | 16-SOIC | - | - |
Key Features
- Low Power Consumption: The ADM691A features low power consumption, making it suitable for battery-powered systems.
- Precision Voltage Monitoring: The component offers precision voltage monitoring with a tolerance of ±2%.
- Reset and Watchdog Timer: Provides power-on reset, watchdog timer, and reset timeout periods to ensure system reliability.
- Battery Backup Switching: Automatic battery backup switchover for CMOS RAM and other low-power logic.
- Fast Onboard Gating of Chip Enable Signals: Quickly gates chip enable signals to protect the system during power transitions.
- Multiple Package Options: Available in 16-pin DIP, SO, and TSSOP packages for flexibility in design.
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 management.
- Intelligent Instruments: Suitable for intelligent instruments that require precise power monitoring and control.
- Automotive Systems: Applied in automotive systems for critical power monitoring and battery backup functions.
Q & A
- What is the primary function of the ADM691AARW-REEL?
The primary function of the ADM691AARW-REEL is to provide power supply monitoring and battery control functions in microprocessor systems.
- What are the operating voltage ranges for the ADM691AARW-REEL?
The operating voltage range for the ADM691AARW-REEL is from 4.75 V to 5.5 V.
- What types of packages are available for the ADM691AARW-REEL?
The ADM691AARW-REEL is available in 16-pin DIP, SO, and TSSOP packages.
- Does the ADM691AARW-REEL support battery backup switching?
- What is the purpose of the watchdog timer in the ADM691AARW-REEL?
The watchdog timer ensures that the system resets if the watchdog input has not been toggled within a specified time period.
- How does the ADM691AARW-REEL handle power-on reset?
The ADM691AARW-REEL provides a power-on reset output during power-up, power-down, and brownout conditions.
- What is the minimum WDI input pulse width for the ADM691AARW-REEL?
The minimum WDI input pulse width is 100 ns.
- Is the ADM691AARW-REEL suitable for automotive applications?
- What is the reset threshold hysteresis for the ADM691AARW-REEL?
The reset threshold hysteresis is 15 mV.
- Can the ADM691AARW-REEL operate with an external clock for the watchdog timer?
