Overview
The ADM708AR, produced by Analog Devices Inc., is a microprocessor supervisory circuit designed to monitor and manage power supply conditions for microprocessors. This device is part of the ADM708 series and is specifically tailored for applications requiring reliable power sequencing and monitoring. It provides essential functions such as power-on reset, power-fail warning, and manual reset capabilities, ensuring that the microprocessor operates within stable voltage conditions.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Comments |
|---|---|---|---|---|---|
| Operating Voltage Range (VCC) | 1.0 | 5.5 | V | ||
| Supply Current | 100 | 200 | 350 | μA | VCC < 3.6 V to 5.5 V |
| Reset Threshold (VRST) | 4.35 | 4.40 | 4.45 | V | |
| Reset Pulse Width | 160 | 200 | 280 | ms | |
| Manual Reset Input (MR) Threshold | 0.8 | 2.0 | V | ||
| Watchdog Timer Availability | No | ||||
| Operating Temperature Range | -40 | 85 | °C | ||
| Package Type | SOIC-8 |
Key Features
- Push-Pull Output: Ensures robust voltage monitoring.
- One-Channel Device: Simplifies power sequencing management.
- Operating Temperature Range: -40°C to 85°C, making it suitable for a wide range of environments.
- Surface-Mount Technology: Enables easy integration onto printed circuit boards.
- Active High and Active Low Reset Outputs: Provides flexibility in reset signal handling.
- Debounced Manual Reset Input (MR): Allows for manual reset with a debounced input to prevent spurious resets.
- Power-Fail Input (PFI): Monitors for power fail or low battery conditions.
- Minimum Reset Timeout: 160 ms to ensure stable power-up conditions.
Applications
The ADM708AR is suitable for various applications where reliable power sequencing and monitoring are critical. These include:
- Microprocessor Systems: Ensures stable power-up and power-down conditions for microprocessors.
- Computers and Controllers: Monitors power supply conditions to prevent system failures.
- Intelligent Instruments: Provides power monitoring and reset capabilities for sophisticated instruments.
- Critical Microprocessor Supply Monitoring: Essential in systems where power supply stability is paramount.
Q & A
- What is the primary function of the ADM708AR?
The primary function of the ADM708AR is to monitor and manage power supply conditions for microprocessors, providing power-on reset, power-fail warning, and manual reset capabilities.
- What are the operating voltage and temperature ranges of the ADM708AR?
The operating voltage range is 1.0 V to 5.5 V, and the operating temperature range is -40°C to 85°C.
- Does the ADM708AR have a watchdog timer function?
No, the ADM708AR does not have a watchdog timer function.
- What types of reset outputs does the ADM708AR provide?
The ADM708AR provides both active high and active low reset outputs.
- What is the purpose of the power-fail input (PFI) on the ADM708AR?
The power-fail input (PFI) monitors for power fail or low battery conditions and generates a corresponding output signal.
- What is the minimum reset timeout of the ADM708AR?
The minimum reset timeout is 160 ms.
- What package types are available for the ADM708AR?
The ADM708AR is available in an 8-lead SOIC package.
- Is the ADM708AR suitable for surface-mount technology?
- What is the significance of the debounced manual reset input (MR) on the ADM708AR?
The debounced manual reset input (MR) prevents spurious resets by ensuring that the reset signal is stable and not triggered by transient conditions.
- In what types of systems is the ADM708AR typically used?
The ADM708AR is typically used in microprocessor systems, computers, controllers, intelligent instruments, and other critical microprocessor supply monitoring applications.
