Overview
The ADM706ARZ-REEL7, produced by Analog Devices Inc., is a low-cost microprocessor supervisory circuit designed to monitor 5 V power supplies and microprocessor activity. This device is part of the ADM705/ADM706/ADM707/ADM708 family, which offers various reset threshold levels and watchdog timer functionalities. The ADM706 specifically generates a reset when the supply voltage falls below 4.40 V, making it suitable for applications requiring precise voltage monitoring and reset generation during power-up, power-down, and brownout conditions.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| VCC Operating Voltage Range | 1.0 | 5.5 | V | ||
| Supply Current | 190 | 250 | μA | ||
| Reset Threshold | 4.25 | 4.40 | 4.50 | V | ADM706 |
| Reset Threshold Hysteresis | 40 mV | ||||
| Reset Pulse Width | 160 | 200 | 280 | ms | |
| RESET Output Voltage | 0.4 V | ISOURCE = 800 μA, VCC - 1.5 V | |||
| Watchdog Timeout Period (tWD) | 1.00 | 1.60 | 2.25 | sec | |
| Operating Temperature Range | -40°C | +85°C | Industrial (Version A) |
Key Features
- Power Supply Monitoring: Monitors 5 V power supplies and generates a reset during power-up, power-down, and brownout conditions.
- Reset Thresholds: The ADM706 has a reset threshold of 4.40 V.
- Watchdog Timer: Independent watchdog monitoring circuitry is available, activated if the watchdog input has not been toggled within 1.60 seconds.
- Power-Fail Detection: Includes a 1.25 V threshold detector to warn of power failures or low battery conditions.
- Manual Reset Input: Active low, debounced manual reset input (MR) is included.
- Package Options: Available in 8-lead PDIP (N-8) and SOIC (R-8) packages.
Applications
- Microprocessor Systems: Suitable for monitoring microprocessor activity and ensuring proper reset conditions.
- Embedded Systems: Ideal for use in embedded systems requiring reliable power supply monitoring.
- Industrial Control Systems: Used in industrial control systems to monitor power supplies and prevent system failures.
- Battery-Powered Devices: Useful in battery-powered devices to detect low battery conditions and prevent data loss.
Q & A
- What is the primary function of the ADM706ARZ-REEL7?
The primary function is to monitor 5 V power supplies and generate a reset during power-up, power-down, and brownout conditions.
- What is the reset threshold voltage for the ADM706?
The reset threshold voltage for the ADM706 is 4.40 V.
- Does the ADM706 have a watchdog timer function?
No, the ADM706 does not have a watchdog timer function; instead, it provides an active high reset output in addition to the active low reset output.
- What is the purpose of the power-fail input (PFI) on the ADM706?
The power-fail input (PFI) is used to detect power failures or low battery conditions, triggering the power-fail output (PFO) when PFI is less than 1.25 V.
- What are the available package options for the ADM706?
The ADM706 is available in 8-lead PDIP (N-8) and SOIC (R-8) packages.
- What is the operating temperature range for the ADM706?
The operating temperature range for the ADM706 is -40°C to +85°C.
- How does the manual reset input (MR) work on the ADM706?
The manual reset input (MR) is an active low, debounced input that generates a reset when taken below 0.8 V.
- What is the supply current of the ADM706?
The supply current of the ADM706 is typically 250 μA.
- Can the ADM706 be used in battery-powered devices?
Yes, the ADM706 can be used in battery-powered devices to detect low battery conditions and prevent data loss.
- How does the reset output voltage behave at different VCC levels?
The reset output voltage remains operational with VCC as low as 1 V, and it follows VCC - 1.5 V for sourcing and sinking currents.
