Overview
The ADM698AR-REEL, produced by Analog Devices Inc., is a microprocessor supervisory circuit designed to provide power supply monitoring and watchdog timing for microprocessor systems. This component is part of the ADM698/ADM699 family and is specifically tailored to ensure reliable operation of microprocessors under various power conditions.
Key Specifications
| Parameter | Min | Typ | Max | Units | Test Conditions/Comments |
|---|---|---|---|---|---|
| VCC Operating Voltage Range | 3.0 | 5.5 | V | ||
| Supply Current | 0.6 | 1.95 | mA | ||
| Power-Down Reset Assertion | 4.5 | 4.65 | 4.73 | V | |
| Power-Up Reset Deassertion | 4.73 | V | |||
| Reset Threshold Hysteresis | 40 mV | ||||
| Reset Active Time | 140 | 200 | 280 | ms | TA = +25°C, VCC = +5 V |
| Watchdog Timeout Period (ADM699) | 1.0 | 1.6 | 2.25 | s | TA = +25°C, VCC = +5 V |
| Minimum WDI Input Pulse Width | 50 ns | VIL = 0.4, VIH = 3.5 V | |||
| RESET Output Voltage | 0.4 | V | ISINK = 1.6 mA, Vcc = 4.4 V | ||
| RESET Output Voltage (VCC = 1 V) | 200 mV | ISINK = 10 µA, VCC = 1.0 V |
Key Features
- Guaranteed RESET assertion with VCC as low as 1 V.
- Low 0.6 mA supply current.
- Precision 4.65 V voltage monitor.
- Power OK/Reset Time Delay.
- Watchdog Timer (for ADM699).
- Minimum component count.
- Performance specified over temperature.
- Available in 8-pin plastic DIP and 16-lead SOIC packages.
Applications
- Microprocessor Systems.
- Computers.
- Controllers.
- Intelligent Instruments.
- Automotive Systems.
- Critical Power Monitoring.
Q & A
- What is the primary function of the ADM698AR-REEL? The primary function is to provide power supply monitoring and watchdog timing for microprocessor systems.
- What is the operating voltage range for the ADM698AR-REEL? The operating voltage range is from 3.0 V to 5.5 V.
- How much current does the ADM698AR-REEL typically consume? The supply current is typically 0.6 mA.
- What is the reset threshold voltage for the ADM698AR-REEL? The reset threshold voltage is 4.65 V.
- Does the ADM698AR-REEL have a watchdog timer? No, the watchdog timer is a feature of the ADM699, not the ADM698.
- In what packages is the ADM698AR-REEL available? It is available in 8-pin plastic DIP and 16-lead SOIC packages.
- What is the minimum VCC voltage at which the RESET output remains operational? The RESET output remains operational with VCC as low as 1 V.
- What is the reset active time for the ADM698AR-REEL? The reset active time is between 140 ms and 280 ms at TA = +25°C, VCC = +5 V.
- What are some common applications of the ADM698AR-REEL? Common applications include microprocessor systems, computers, controllers, intelligent instruments, and automotive systems.
- Is the ADM698AR-REEL suitable for critical power monitoring? Yes, it is suitable for critical power monitoring due to its precise voltage monitoring and reset functions.
