Overview
The ADM707AN, 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 particularly suited for applications requiring robust power supply and microprocessor monitoring.
The ADM707AN provides essential functions such as power-on reset, power-fail warning, and low battery detection. It is an upgrade to the MAX705 to MAX708 series and offers a compact solution for various microprocessor-based systems.
Key Specifications
| Parameter | ADM707AN |
|---|---|
| Operating Voltage Range | 1.0 V to 5.5 V |
| Supply Current | 190 μA to 250 μA |
| Reset Threshold | 4.5 V to 4.75 V (with 40 mV hysteresis) |
| Reset Pulse Width | 160 ms to 280 ms |
| Reset Output Voltage | VCC - 1.5 V (ISOURCE = 800 μA), 0.4 V (ISINK = 1.2 mA) |
| Manual Reset Input (MR) | Debounced TTL/CMOS, Logic Low: 0.8 V, Logic High: 2.0 V |
| Power-Fail Input (PFI) Threshold | 1.2 V to 1.3 V |
| Power-Fail Output (PFO) Voltage | VCC - 1.5 V (ISOURCE = 800 μA), 0.4 V (ISINK = 3.2 mA) |
| Watchdog Timer (Not Available) | N/A (Active high reset output instead) |
| Package Types | 8-Lead PDIP, 8-Lead SOIC, 8-Lead MSOP |
| Operating Temperature Range | -40°C to +85°C |
Key Features
- Power-on reset output during power-up, power-down, and brownout conditions, remaining operational with VCC as low as 1 V.
- Voltage monitor for power fail or low battery warning with a 1.25 V threshold detector.
- Active low, debounced manual reset input (MR) compatible with TTL/CMOS logic.
- Active high reset output (instead of watchdog timer function).
- Low quiescent current of 190 μA to 250 μA.
- Precision supply voltage monitoring with reset thresholds of 4.65 V (ADM707) and 4.40 V (ADM708).
- Compact packaging options including 8-Lead PDIP, SOIC, and MSOP.
Applications
- Microprocessor systems
- Computers
- Controllers
- Intelligent instruments
- Critical microprocessor supply monitoring
- Automotive systems
Q & A
- What is the primary function of the ADM707AN?
The primary function of the ADM707AN is to monitor 5 V power supplies and microprocessor activity, providing power-on reset, power-fail warning, and low battery detection.
- What are the reset threshold levels for the ADM707AN?
The reset threshold level for the ADM707AN is between 4.5 V and 4.75 V with a 40 mV hysteresis.
- Does the ADM707AN have a watchdog timer function?
No, the ADM707AN does not have a watchdog timer function; instead, it provides an active high reset output.
- What is the operating voltage range of the ADM707AN?
The operating voltage range of the ADM707AN is from 1.0 V to 5.5 V.
- What types of packages are available for the ADM707AN?
The ADM707AN is available in 8-Lead PDIP, 8-Lead SOIC, and 8-Lead MSOP packages.
- What is the quiescent current of the ADM707AN?
The quiescent current of the ADM707AN is between 190 μA and 250 μA.
- Can the ADM707AN operate at low VCC levels?
- What is the purpose of the manual reset input (MR) on the ADM707AN?
The manual reset input (MR) is a debounced TTL/CMOS input that generates a reset when taken below 0.8 V.
- What are some common applications of the ADM707AN?
The ADM707AN is commonly used in microprocessor systems, computers, controllers, intelligent instruments, and automotive systems.
- Is the ADM707AN RoHS compliant?
