Overview
The ADM708AR-REEL, produced by Analog Devices Inc., is a microprocessor supervisory circuit designed to monitor 5 V power supplies and batteries. This device is part of the ADM705/ADM706/ADM707/ADM708 family, which offers various reset threshold levels and package options. The ADM708 specifically provides an active high reset output in addition to the active low reset output, making it versatile for different system requirements.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| VCC Operating Voltage Range | 3.00 | 5.5 | V | ||
| Supply Current | 100 | 200 | 350 | μA | VCC < 3.6 V and VCC < 5.5 V respectively |
| Reset Threshold (VRST) | 2.85 | 2.93 | 3.00 | V | For ADM708R |
| Reset Threshold Hysteresis | 20 | mV | |||
| Reset Pulse Width | 160 | 200 | 280 | ms | VCC = 3 V to 5.0 V |
| Power Fail Input (PFI) Threshold | 1.2 | 1.25 | 1.3 | V | |
| Operating Temperature Range | -40 | 85 | °C | Industrial version | |
| Package Options | 8-Lead PDIP, 8-Lead SOIC, 8-Lead MSOP |
Key Features
- Debounced TTL/CMOS Manual Reset Input (MR): The MR input can be driven from TTL, CMOS logic, or a manual reset switch and is internally debounced.
- Active High and Low Reset Outputs: Provides both active high and active low reset outputs, enhancing flexibility in system design.
- Power Fail Input (PFI): Monitors the power fail condition with a threshold of 1.2 V to 1.3 V.
- Voltage Monitoring: Monitors the power supply voltage and generates a reset signal if the voltage falls below the specified threshold.
- Low Supply Current: Operates with a low supply current, typically 100 μA to 350 μA depending on the VCC voltage.
- Multiple Package Options: Available in 8-Lead PDIP, 8-Lead SOIC, and 8-Lead MSOP packages.
Applications
- Microprocessor Systems: Ideal for monitoring and protecting microprocessors in various applications.
- Embedded Systems: Suitable for use in embedded systems requiring reliable power monitoring and reset functions.
- Industrial Control Systems: Used in industrial control systems to ensure reliable operation under varying power conditions.
- Battery-Powered Devices: Monitors battery voltage and provides low battery warnings, making it suitable for battery-powered devices.
Q & A
- What is the operating voltage range of the ADM708AR-REEL?
The operating voltage range is from 3.00 V to 5.5 V.
- What are the package options available for the ADM708AR-REEL?
The device is available in 8-Lead PDIP, 8-Lead SOIC, and 8-Lead MSOP packages.
- What is the reset threshold voltage for the ADM708R?
The reset threshold voltage for the ADM708R is between 2.85 V and 3.00 V.
- How does the manual reset input (MR) work?
The MR input is debounced and can be driven from TTL, CMOS logic, or a manual reset switch. It is internally pulled up with a 250 μA current.
- What is the power fail input (PFI) threshold voltage?
The PFI threshold voltage is between 1.2 V and 1.3 V.
- What is the typical supply current of the ADM708AR-REEL?
The typical supply current is between 100 μA and 350 μA depending on the VCC voltage.
- What are the operating temperature ranges for the ADM708AR-REEL?
The operating temperature range is from -40°C to +85°C for the industrial version.
- Does the ADM708AR-REEL have a watchdog timer function?
No, the ADM708 does not have a watchdog timer function; instead, it provides an active high reset output.
- What is the purpose of the power fail output (PFO)?
The PFO goes low when the PFI input is less than 1.25 V, indicating a power fail condition.
- Is the ADM708AR-REEL RoHS compliant?
