Overview
The ADM705AR-REEL, produced by Analog Devices Inc., is a microprocessor supervisory circuit designed to monitor 5 V power supplies and microprocessor activity. This component is part of the ADM705/ADM706/ADM707/ADM708 family and is specifically tailored for applications requiring robust power supply monitoring and reset functionality.
The ADM705AR-REEL provides power-supply monitoring circuitry that generates a reset output during power-up, power-down, and brownout conditions. It also includes an independent watchdog monitoring circuitry and a 1.25 V threshold detector to warn of power failures or low battery conditions.
Key Specifications
| Parameter | Min | Max | Unit | Test Conditions/Comments | |
|---|---|---|---|---|---|
| VCC Operating Voltage Range | 1.0 | 5.5 | 5.5 | V | |
| Supply Current | 190 | 250 | 250 | μA | VCC = 4.75 V to 5.5 V, TA = TMIN to TMAX |
| Reset Threshold | 4.5 | 4.65 | 4.75 | V | ADM705/ADM707 |
| Reset Threshold Hysteresis | 40 | mV | |||
| Reset Pulse Width | 160 | 200 | 280 | ms | |
| Watchdog Timeout Period (tWD) | 1.00 | 1.60 | 2.25 | sec | |
| Watchdog Input (WDI) Pulse Width (tWP) | 50 | ns | |||
| Manual Reset Input (MR) Pull-Up Current | 100 | 250 | 600 | μA | MR = 0 V |
| Power-Fail Input (PFI) Threshold | 1.2 | 1.25 | 1.3 | V | |
| Operating Temperature Range | -40 | 85 | °C | Industrial (Version A) |
Key Features
- Power-supply monitoring circuitry that generates a reset output during power-up, power-down, and brownout conditions.
- Independent watchdog monitoring circuitry with a 1.60 sec timeout period.
- 1.25 V threshold detector to warn of power failures or low battery conditions.
- Active low, debounced manual reset input (MR).
- Available in narrow 8-lead PDIP and 8-lead SOIC packages.
- Reset output remains operational with VCC as low as 1 V.
Applications
- Microprocessor systems.
- Computers.
- Controllers.
- Intelligent instruments.
- Critical microprocessor supply monitoring.
Q & A
- What is the primary function of the ADM705AR-REEL?
The primary function is to monitor 5 V power supplies and microprocessor activity, generating reset outputs during power-up, power-down, and brownout conditions.
- What is the reset threshold voltage for the ADM705AR-REEL?
The reset threshold voltage is 4.65 V.
- Does the ADM705AR-REEL have a watchdog timer function?
Yes, it includes an independent watchdog monitoring circuitry with a 1.60 sec timeout period.
- What is the purpose of the 1.25 V threshold detector?
The 1.25 V threshold detector is used to warn of power failures, detect low battery conditions, or monitor an additional power supply.
- What types of packages are available for the ADM705AR-REEL?
The component is available in narrow 8-lead PDIP and 8-lead SOIC packages.
- What is the operating temperature range for the ADM705AR-REEL?
The operating temperature range is -40°C to +85°C for the industrial version.
- How does the manual reset input (MR) work?
The manual reset input (MR) is an active low, debounced input that can be used to manually reset the system.
- What is the supply current of the ADM705AR-REEL?
The supply current is typically 250 μA with VCC = 4.75 V to 5.5 V and TA = TMIN to TMAX.
- Is the ADM705AR-REEL RoHS compliant?
Yes, the ADM705AR-REEL is RoHS compliant.
- What are some common applications of the ADM705AR-REEL?
Common applications include microprocessor systems, computers, controllers, intelligent instruments, and critical microprocessor supply monitoring.
