Overview
The ADM699ARZ is a microprocessor supervisory circuit produced by Analog Devices Inc. This component is designed to provide power supply monitoring and watchdog timing for microprocessor systems. It ensures reliable operation by generating a RESET pulse during power-up, power-down, and low voltage 'Brown Out' conditions. The ADM699ARZ is particularly useful in systems that require precise voltage monitoring and automatic reset functions.
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 | |
| Reset Threshold Hysteresis | 40 | mV | |||
| Reset Active Time | 140 | 200 | 280 | ms | TA = +25°C, VCC = +5 V |
| Watchdog Timeout Period | 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 | ||
| Package | 16-SOIC (0.295, 7.50mm Width) |
Key Features
- Precision Voltage Monitoring: The ADM699ARZ monitors the 5 V VCC power supply and generates a RESET pulse during power-up, power-down, and low voltage 'Brown Out' conditions with a precise reset threshold of 4.65 V.
- Watchdog Timer: It includes a watchdog timer input to monitor microprocessor activity, ensuring the RESET output is forced low if the watchdog input is not toggled within the 1 second watchdog timeout period.
- Low Supply Current: The device operates with a low supply current of 0.6 mA to 1.95 mA, making it energy-efficient.
- Multiple Output Options: Available in 16-lead SOIC packages with additional outputs such as RESET (without inversion) and Watchdog Output (WDO) for the ADM699.
- Operating Temperature Range: The component is operational over a temperature range of -40°C to +85°C.
Applications
- Microprocessor Systems: Ideal for monitoring and managing power supplies in microprocessor-based systems.
- Computers and Controllers: Used in various computer and controller applications to ensure reliable power supply monitoring.
- Intelligent Instruments: Suitable for intelligent instruments that require precise voltage monitoring and automatic reset functions).
- Automotive Systems: Employed in automotive systems for critical power monitoring and management).
Q & A
- Q: What is the primary function of the ADM699ARZ?
A: The primary function of the ADM699ARZ is to provide power supply monitoring and watchdog timing for microprocessor systems, ensuring reliable operation by generating a RESET pulse during power-up, power-down, and low voltage 'Brown Out' conditions.
- Q: What is the typical reset threshold voltage of the ADM699ARZ?
A: The typical reset threshold voltage of the ADM699ARZ is 4.65 V.
- Q: Does the ADM699ARZ have a watchdog timer?
A: Yes, the ADM699ARZ includes a watchdog timer input to monitor microprocessor activity, ensuring the RESET output is forced low if the watchdog input is not toggled within the 1 second watchdog timeout period).
- Q: What is the operating temperature range of the ADM699ARZ?
A: The ADM699ARZ operates over a temperature range of -40°C to +85°C).
- Q: What is the supply current range of the ADM699ARZ?
A: The supply current range of the ADM699ARZ is from 0.6 mA to 1.95 mA).
- Q: In what package types is the ADM699ARZ available?
A: The ADM699ARZ is available in 16-lead SOIC packages).
- Q: What are the typical applications of the ADM699ARZ?
A: The ADM699ARZ is typically used in microprocessor systems, computers, controllers, intelligent instruments, and automotive systems).
- Q: Does the ADM699ARZ have multiple output options?
A: Yes, the ADM699ARZ in 16-lead SOIC packages includes additional outputs such as RESET (without inversion) and Watchdog Output (WDO)).
- Q: How does the watchdog timer work in the ADM699ARZ?
A: The watchdog timer in the ADM699ARZ forces the RESET output low if the watchdog input is not toggled within the 1 second watchdog timeout period. The timer resets with each transition on the WDI line).
- Q: What is the minimum reset active time of the ADM699ARZ?
A: The minimum reset active time of the ADM699ARZ is 140 ms).
