Overview
The ADM691AARNZ is a microprocessor supervisory circuit manufactured by Analog Devices Inc. This component is part of the ADM691A/ADM693A/ADM800L/M family, which provides comprehensive single-chip solutions for power supply monitoring and battery control functions in microprocessor systems. The ADM691AARNZ is designed to ensure reliable operation of microprocessors by monitoring power supply conditions, providing reset signals, and managing battery backup.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Operating Voltage Range (VCC) | 4.75 | 5.5 | V | ||
| Operating Voltage Range (VBATT) | 2.8 | V | |||
| Output Voltage (VOUT) | VCC - 0.05 | VCC - 0.02 | VCC - 0.3 | V | IOUT = 25 mA, IOUT = 250 mA |
| Output Resistance | 0.8 | 1.2 | Ω | VCC = 4.5 V | |
| Reset Time Delay | 200 ms | Adjustable | |||
| Watchdog Timeout | 100 ms | 1.6 s, Adjustable | |||
| Battery Backup Switching | Yes | ||||
| Package Type | NSOIC-16 | ||||
| Temperature Range | -40°C | +85°C |
Key Features
- Low Power Consumption: The ADM691AARNZ features low power consumption, making it suitable for battery-powered systems.
- Precision Voltage Monitor: It includes a precision voltage monitor with a tolerance of ±3% for the ADM691A and ±2% for the ADM800L/M models.
- Reset Time Delay: The component offers a reset time delay of 200 ms or adjustable, ensuring proper system initialization.
- Watchdog Timer: An optional watchdog timer provides a reset pulse if the timer is not toggled within a specified time, enhancing system reliability.
- Battery Backup Switching: Automatic battery backup power switching for CMOS RAM, CMOS microprocessors, or other low-power logic.
- Power-Fail Warning: A 1.25 V threshold detector for power fail warning, low battery detection, or monitoring other power supplies.
- Fast Onboard Gating of Chip Enable Signals: This feature allows for quick and efficient control of chip enable signals.
- 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 supply conditions in microprocessor-based systems.
- Computers and Controllers: Used in various computer and controller applications to ensure reliable operation.
- Intelligent Instruments: Suitable for intelligent instruments that require precise power monitoring and control.
- Automotive Systems: Employed in automotive systems for critical power monitoring and battery management.
- Critical Power Monitoring: Essential in applications where power supply monitoring is critical, such as in medical devices and industrial control systems.
Q & A
- What is the primary function of the ADM691AARNZ?
The primary function of the ADM691AARNZ is to provide power supply monitoring and battery control functions in microprocessor systems.
- What are the key features of the ADM691AARNZ?
Key features include low power consumption, precision voltage monitoring, reset time delay, watchdog timer, battery backup switching, and power-fail warning.
- What are the available package types for the ADM691AARNZ?
The ADM691AARNZ is available in 16-pin DIP, SO, and TSSOP packages.
- What is the operating voltage range for the ADM691AARNZ?
The operating voltage range for VCC is 4.75 V to 5.5 V, and for VBATT, it is +2.8 V.
- Does the ADM691AARNZ support battery backup switching?
Yes, the ADM691AARNZ supports automatic battery backup power switching for CMOS RAM and other low-power logic.
- What is the purpose of the watchdog timer in the ADM691AARNZ?
The watchdog timer provides a reset pulse if it is not toggled within a specified time, ensuring system reliability.
- In what temperature range can the ADM691AARNZ operate?
The ADM691AARNZ can operate in a temperature range of -40°C to +85°C.
- What types of systems can the ADM691AARNZ be used in?
The ADM691AARNZ can be used in microprocessor systems, computers, controllers, intelligent instruments, and automotive systems.
- How does the ADM691AARNZ handle power-fail conditions?
The ADM691AARNZ includes a 1.25 V threshold detector for power fail warning, low battery detection, or monitoring other power supplies.
- Is the ADM691AARNZ available in different models with varying specifications?
Yes, the ADM691AARNZ is part of a family that includes models like ADM693A and ADM800L/M, each with slightly different specifications.
