Overview
The ADM707AR, produced by Analog Devices Inc., is a 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 functionalities for power supply and microprocessor monitoring. The ADM707AR is particularly suited for applications requiring power-on reset, power-fail detection, and low battery warning without the need for a watchdog timer function.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Reset Threshold Voltage | 4.65 V | V |
| Power Supply Voltage (VCC) | 5 V | V |
| Watchdog Timeout Period (ADM705/ADM706) | 1.60 sec | sec |
| Power-Fail Input Threshold | 1.2 - 1.3 V | V |
| Manual Reset Input (MR) Pull-Up Current | 100 - 250 μA | μA |
| Manual Reset Input (MR) Pulse Width | 150 ns | ns |
| Operating Temperature Range | -40°C to +85°C | °C |
| Package Types | 8-Lead PDIP, 8-Lead SOIC, 8-Lead MSOP |
Key Features
- Power-on reset output during power-up, power-down, and brownout conditions, operational with VCC as low as 1 V.
- Voltage monitor for power fail or low battery warning.
- Active low debounced manual reset input (MR).
- 1.25 V threshold detector for power-fail warning, low battery detection, or to monitor an additional power supply.
- No watchdog timer function; instead, an active high reset output (RESET) is available along with the active low reset output (RESET).
- Available in narrow 8-lead PDIP, 8-lead SOIC, and 8-lead MSOP packages.
Applications
- Microprocessor systems
- Computers
- Controllers
- Intelligent instruments
- Critical microprocessor power monitoring
- Automotive systems
Q & A
- What is the primary function of the ADM707AR?
The primary function of the ADM707AR is to monitor 5 V power supplies and microprocessor activity, providing power-on reset, power-fail detection, and low battery warning.
- What is the reset threshold voltage for the ADM707AR?
The reset threshold voltage for the ADM707AR is 4.65 V.
- Does the ADM707AR have a watchdog timer function?
No, the ADM707AR does not have a watchdog timer function. Instead, it provides an active high reset output along with the active low reset output.
- What are the package types available for the ADM707AR?
The ADM707AR is available in 8-lead PDIP, 8-lead SOIC, and 8-lead MSOP packages.
- What is the operating temperature range for the ADM707AR?
The operating temperature range for the ADM707AR is -40°C to +85°C.
- What is the purpose of the manual reset input (MR) on the ADM707AR?
The manual reset input (MR) is a debounced input that generates a reset when taken below 0.8 V, allowing for manual reset from TTL, CMOS logic, or a manual reset switch.
- How does the power-fail input (PFI) work on the ADM707AR?
The power-fail input (PFI) is the noninverting input to the power-fail comparator. When PFI is less than 1.25 V, the power-fail output (PFO) goes low.
- What are some typical applications of the ADM707AR?
Typical applications include microprocessor systems, computers, controllers, intelligent instruments, and automotive systems.
- Is the ADM707AR suitable for monitoring microprocessor activity during power-up and power-down conditions?
- Can the ADM707AR operate with a low VCC voltage?
