Overview
The ADM707ARZ, produced by Analog Devices Inc., is a microprocessor supervisory circuit designed to monitor 5 V power supplies and microprocessor activity. This device is part of the ADM707/ADM708 series, which provides essential functions for ensuring the reliable operation of microprocessor systems. The ADM707ARZ is particularly useful in applications requiring power-supply monitoring, watchdog timer functionality, and manual reset capabilities.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Reset Threshold Monitor Level | 4.65 V | V |
| Watchdog Timeout Period | Not Available (ADM707/ADM708) | - |
| Watchdog Input Threshold | Logic Low: 0.8 V, Logic High: 3.5 V | V |
| Watchdog Input Current | 50 to 150 µA | µA |
| Manual Reset Input Threshold | Logic Low: 0.8 V, Logic High: 2.0 V | V |
| Manual Reset Input Pull-Up Current | 100 to 250 µA | µA |
| Power-Fail Input Threshold | 1.2 to 1.3 V | V |
| Package Type | 8-lead SOIC | - |
Key Features
- Power-Supply Monitoring: Generates a reset output during power-up, power-down, and brownout conditions.
- Active High Reset Output: Provides an active high reset output (RESET) in addition to the active low reset output.
- Manual Reset Input: Includes a debounced, active low manual reset input (MR).
- Power-Fail Warning: Features a 1.25 V threshold detector to warn of power failures or low battery conditions.
- Low Voltage Operation: The reset output remains operational with VCC as low as 1 V.
Applications
- Microprocessor Systems: Ideal for monitoring and ensuring the reliable operation of microprocessors.
- Computers and Controllers: Suitable for use in various computer and controller applications.
- Intelligent Instruments: Used in intelligent instruments that require robust power supply monitoring.
- Critical Microprocessor Supply Monitoring: Essential for critical systems where power supply stability is crucial.
Q & A
- What is the primary function of the ADM707ARZ?
The primary function of the ADM707ARZ is to monitor 5 V power supplies and microprocessor activity, providing reset outputs during power-up, power-down, and brownout conditions.
- What is the reset threshold monitor level for the ADM707ARZ?
The reset threshold monitor level for the ADM707ARZ is 4.65 V.
- Does the ADM707ARZ have a watchdog timer function?
No, the ADM707ARZ does not have a watchdog timer function; instead, it provides an active high reset output.
- What is the package type of the ADM707ARZ?
The ADM707ARZ is available in an 8-lead SOIC package.
- What is the minimum VCC voltage at which the reset output remains operational?
The reset output remains operational with VCC as low as 1 V.
- What is the purpose of the manual reset input (MR) on the ADM707ARZ?
The manual reset input (MR) is a debounced, active low input that allows for manual reset of the system.
- What is the power-fail input threshold for the ADM707ARZ?
The power-fail input threshold for the ADM707ARZ is between 1.2 V and 1.3 V.
- In what types of applications is the ADM707ARZ commonly used?
The ADM707ARZ is commonly used in microprocessor systems, computers, controllers, and intelligent instruments.
- How does the ADM707ARZ handle low battery conditions?
The ADM707ARZ features a 1.25 V threshold detector to warn of power failures or low battery conditions.
- What are the logic levels for the watchdog input on the ADM707ARZ?
The watchdog input on the ADM707ARZ has logic levels of 0.8 V for low and 3.5 V for high.
