Overview
The ADM691ARZ-REEL, produced by Analog Devices Inc., is a supervisory circuit designed to provide comprehensive power supply monitoring and battery control functions in microprocessor systems. This component is part of the ADM691A/ADM693A/ADM800L/ADM800M family, offering a single-chip solution for various power management needs. It is fabricated using a 5V CMOS process, ensuring low power consumption and high reliability.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Operating Voltage Range (VCC) | 4.75 | 5.5 | V | ADM691A, ADM800L | |
| Operating Voltage Range (VCC) | 4.5 | 5.5 | V | ADM693A, ADM800M | |
| Battery Backup Switching - VOUT | VCC - 0.05 | VCC - 0.02 | VCC - 0.3 | V | IOUT = 25 mA, IOUT = 250 mA |
| PFI Input Threshold (ADM69xA) | 1.2 | 1.25 | 1.3 | V | VCC = 5 V |
| PFI Input Threshold (ADM800L/M) | 1.225 | 1.25 | 1.275 | V | VCC = 5 V |
| PFO Output Voltage | 0.4 | V | ISINK = 3.2 mA | ||
| CEIN to CEOUT Resistance | 40 | 150 | Ω | Enable Mode | |
| CEIN to CEOUT Propagation Delay | 6 | 10 | ns | RIN = 50 Ω, CLOAD = 50 pF |
Key Features
- Low Power Consumption: The ADM691ARZ-REEL features low power consumption, making it suitable for battery-powered systems.
- Precision Voltage Monitor: It offers a precision voltage monitor with ±2% tolerance on the ADM800L/M models.
- Reset Time Delay: The component provides a reset time delay of 200 ms, or it can be adjusted as needed.
- Automatic Battery Backup Power Switching: It includes automatic battery backup power switching for CMOS RAM and other low-power logic devices.
- Watchdog Timer: The ADM691ARZ-REEL includes a watchdog timer that generates a reset pulse if the timer is not toggled within a specified time.
- Power-On Reset Output: The circuit provides a power-on reset output during power-up, power-down, and brownout conditions.
- Multiple Package Options: Available in 16-pin DIP, SO, and TSSOP packages, offering flexibility in design.
Applications
- Microprocessor Systems: Ideal for monitoring and controlling power supplies in microprocessor-based systems.
- Computers and Controllers: Used in various computer and controller applications to ensure reliable power management.
- Intelligent Instruments: Suitable for intelligent instruments that require precise power monitoring and control.
- Automotive Systems: Applied in automotive systems for critical power monitoring and battery backup functions.
Q & A
- What is the primary function of the ADM691ARZ-REEL?
The primary function of the ADM691ARZ-REEL is to provide power supply monitoring and battery control functions in microprocessor systems.
- What are the operating voltage ranges for the ADM691A and ADM693A models?
The operating voltage range for the ADM691A and ADM800L is 4.75 V to 5.5 V, and for the ADM693A and ADM800M, it is 4.5 V to 5.5 V.
- What is the precision of the voltage monitor in the ADM800L/M models?
The voltage monitor in the ADM800L/M models has a precision of ±2% tolerance.
- What is the reset time delay provided by the ADM691ARZ-REEL?
The reset time delay is 200 ms, or it can be adjusted as needed.
- Does the ADM691ARZ-REEL support automatic battery backup power switching?
Yes, it supports automatic battery backup power switching for CMOS RAM and other low-power logic devices.
- What is the purpose of the watchdog timer in the ADM691ARZ-REEL?
The watchdog timer generates a reset pulse if it is not toggled within a specified time.
- In what packages is the ADM691ARZ-REEL available?
The ADM691ARZ-REEL is available in 16-pin DIP, SO, and TSSOP packages.
- What are some common applications of the ADM691ARZ-REEL?
Common applications include microprocessor systems, computers, controllers, intelligent instruments, and automotive systems.
- How does the ADM691ARZ-REEL handle power-on reset output?
The circuit provides a power-on reset output during power-up, power-down, and brownout conditions.
- What is the typical standby current of the ADM691ARZ-REEL?
The typical standby current is 1 µA.
