Overview
The ADM705AN is a microprocessor supervisory circuit manufactured by Analog Devices Inc. This component is designed to monitor and manage the power supply and microprocessor activity in various electronic systems. It is particularly suitable for applications requiring robust power-on reset, watchdog timer functionality, and power-fail detection.
The ADM705AN is part of the ADM705/ADM706/ADM707/ADM708 family, which offers different configurations to meet various system requirements. It operates within a temperature range of -40°C to +85°C and is available in an 8-lead plastic dual in-line package (PDIP).
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package Type | 8-DIP (0.300", 7.62mm) | |
| Operating Voltage Range | 1.0 to 5.5 | V |
| Supply Current | 190 to 250 | μA |
| Reset Threshold | 4.5 to 4.75 | V |
| Reset Threshold Hysteresis | 40 | mV |
| Reset Pulse Width | 160 to 280 | ms |
| Watchdog Timeout Period | 1.00 to 2.25 | sec |
| Watchdog Input Threshold | 0.8 V (Logic Low), 3.5 V (Logic High) | V |
| Manual Reset Input Threshold | 0.8 to 2.0 | V |
Key Features
- Power-on Reset Output: Generates a reset during power-up, power-down, and brownout conditions. The RESET output remains operational with VCC as low as 1 V.
- Independent Watchdog Timer: The ADM705AN features a watchdog timer with a 1.6-second timeout period, which goes low if the watchdog input has not been toggled within this time frame.
- Power-Fail Warning: Includes a 1.25 V threshold detector for power-fail warning, low battery detection, or monitoring a power supply other than 5 V.
- Manual Reset Input: An active-low debounced manual reset input (MR) that can be driven from TTL, CMOS logic, or a manual reset switch.
- Multiple Package Options: Available in 8-lead DIP and SOIC packages.
Applications
- Microprocessor Systems: Ideal for monitoring and managing power supplies in microprocessor-based systems.
- Computers and Controllers: Suitable for use in computer systems, controllers, and other critical microprocessor monitoring applications.
- Intelligent Instruments: Used in intelligent instruments that require robust power management and reset capabilities.
- Automotive Systems: Applicable in automotive systems where reliable power monitoring is crucial.
Q & A
- What is the primary function of the ADM705AN?
The primary function of the ADM705AN is to monitor the power supply and microprocessor activity, providing power-on reset, watchdog timer functionality, and power-fail detection.
- What is the operating temperature range of the ADM705AN?
The ADM705AN operates within a temperature range of -40°C to +85°C.
- What types of packages are available for the ADM705AN?
The ADM705AN is available in 8-lead DIP and SOIC packages.
- What is the watchdog timeout period for the ADM705AN?
The watchdog timeout period for the ADM705AN is between 1.00 to 2.25 seconds.
- Can the ADM705AN be used in automotive systems?
- What is the reset threshold voltage for the ADM705AN?
The reset threshold voltage for the ADM705AN is between 4.5 to 4.75 V.
- Does the ADM705AN have a manual reset input?
- What is the supply current range for the ADM705AN?
The supply current range for the ADM705AN is between 190 to 250 μA.
- Is the ADM705AN ESD sensitive?
- What are some common applications of the ADM705AN?
