Overview
The ADM709RAR, produced by Analog Devices Inc., is a power supply monitor integrated circuit designed to generate a system reset during power-up, power-down, and brownout conditions. This component is crucial for ensuring the stability and reliability of microprocessor systems by monitoring the supply voltage and initiating a reset when the voltage falls below a specified threshold. The ADM709RAR is available in an 8-pin SOIC package and supports a range of supply voltage thresholds, making it versatile for various applications.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | 8-Pin SOIC |
| Reset Threshold Voltage | 2.63 V (R suffix) |
| Operating Temperature Range | –40°C to +85°C |
| Quiescent Current | 35 µA |
| Power-On Reset Pulse Duration | 140 ms (min), 280 ms (typ), 380 ms (max) |
| Reset Output Voltage | 0.3 V (ISINK = 1.2 mA), 0.4 V (ISINK = 3.2 mA) |
| VCC to RESET Delay | 20 µs |
| RESET Active Time-Out Period | 140 ms to 380 ms |
Key Features
- Precision supply voltage monitor for +5 V, +3.3 V, and +3 V power supplies.
- Low quiescent current of 35 µA.
- 140 ms (min) power-on reset pulse.
- Low cost and compact 8-pin DIP/SO packages.
- Upgrade for MAX709.
- RESET output remains operational with VCC as low as 1 V.
Applications
- Microprocessor systems.
- Computers and controllers.
- Intelligent instruments.
- Critical microprocessor monitoring.
- Automotive systems.
Q & A
- What is the primary function of the ADM709RAR? The primary function is to monitor the power supply and generate a system reset during power-up, power-down, and brownout conditions.
- What are the available package types for the ADM709? The ADM709 is available in 8-pin DIP and SOIC packages.
- What is the reset threshold voltage for the ADM709RAR model? The reset threshold voltage for the ADM709RAR is 2.63 V.
- What is the operating temperature range of the ADM709RAR? The operating temperature range is –40°C to +85°C.
- How long does the power-on reset pulse last? The power-on reset pulse duration is a minimum of 140 ms, typically 280 ms, and a maximum of 380 ms.
- What is the quiescent current of the ADM709RAR? The quiescent current is 35 µA.
- Is the RESET output operational at low VCC levels? Yes, the RESET output remains operational with VCC as low as 1 V.
- What are some common applications of the ADM709RAR? Common applications include microprocessor systems, computers, controllers, intelligent instruments, and automotive systems.
- Can the ADM709RAR be used as an upgrade for other components? Yes, it can be used as an upgrade for the MAX709.
- What is the VCC to RESET delay time? The VCC to RESET delay time is 20 µs.
