Overview
The ADM691AARN is a microprocessor supervisory circuit produced by Analog Devices Inc. This IC is part of the ADM691A/ADM693A family, designed to provide comprehensive power supply monitoring and battery control functions in microprocessor systems. It features a robust set of functionalities including power-on reset, battery backup switching, watchdog timer, and power-fail warning, ensuring reliable operation of microprocessors under various conditions.
Key Specifications
| Parameter | Value | Unit | Comments |
|---|---|---|---|
| Manufacturer | Analog Devices Inc. | ||
| Package | 16-SOIC N | ||
| Threshold Voltage | 4.65 V | ||
| Number of Voltages Monitored | 1 | ||
| Output Type | Open Drain, Push-Pull | ||
| Reset Type | Active High/Active Low | ||
| Reset Timeout | 140 ms (Minimum) | ||
| Operating Temperature | -40°C to +85°C | ||
| Mounting Type | Surface Mount | ||
| Max Supply Voltage | 5.5 V | ||
| Power Dissipation | 700 mW | ||
| Watchdog Timer | Yes | ||
| Battery Backup Switching | Yes |
Key Features
- Precision Voltage Monitoring: The ADM691AARN features precision voltage monitoring with a 2% tolerance, ensuring accurate detection of voltage levels.
- Power-on Reset: Provides a reset pulse during power-up, power-down, and brownout conditions, ensuring the system starts in a known state.
- Battery Backup Switching: Automatically switches to battery backup for CMOS RAM or other low-power logic when the main power supply fails.
- Watchdog Timer: Includes a watchdog timer that generates a reset pulse if the timer is not toggled within a specified time, preventing system lockup.
- Power-Fail Warning: Offers a power-fail output to indicate low battery or power supply failure.
- Low Power Consumption: Operates with low power consumption, including a standby current of 1 µA.
- Chip Enable Gating: Provides fast onboard gating of chip enable signals.
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 use in intelligent instruments that require precise power supply monitoring.
- Automotive Systems: Applied in automotive systems for critical power monitoring and control.
Q & A
- What is the primary function of the ADM691AARN?
The primary function of the ADM691AARN is to provide power supply monitoring and battery control functions for microprocessor systems.
- What is the threshold voltage for the ADM691AARN?
The threshold voltage for the ADM691AARN is 4.65 V.
- What types of outputs does the ADM691AARN provide?
The ADM691AARN provides open drain and push-pull outputs.
- Does the ADM691AARN have a watchdog timer?
Yes, the ADM691AARN includes a watchdog timer that generates a reset pulse if not toggled within a specified time.
- What is the operating temperature range of the ADM691AARN?
The operating temperature range of the ADM691AARN is -40°C to +85°C.
- What is the maximum supply voltage for the ADM691AARN?
The maximum supply voltage for the ADM691AARN is 5.5 V.
- Does the ADM691AARN support battery backup switching?
Yes, the ADM691AARN supports automatic battery backup switching for CMOS RAM or other low-power logic.
- What is the power dissipation of the ADM691AARN?
The power dissipation of the ADM691AARN is 700 mW.
- In what package is the ADM691AARN available?
The ADM691AARN is available in a 16-SOIC N package.
- What are some common applications of the ADM691AARN?
The ADM691AARN is commonly used in microprocessor systems, computers, controllers, intelligent instruments, and automotive systems.
