Overview
The ADM691AARN-REEL7, produced by Analog Devices Inc., is a microprocessor supervisory circuit that offers comprehensive single-chip solutions for power supply monitoring and battery control functions in microprocessor systems. This device integrates several critical functions, including microprocessor reset, backup-battery switchover, watchdog timer, CMOS RAM write protection, and power-failure warning. It is designed to ensure reliable operation of microprocessor systems under various power conditions.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Operating Voltage Range (VCC) | 4.75 | 5.5 | V | ||
| Operating Voltage Range (VBATT) | 2.0 | 4.25 | V | ||
| Reset Threshold Voltage | 4.65 | V | ± 3% | ||
| Reset Time Delay | 200 ms | Or adjustable | |||
| Watchdog Timeout Period | 100 ms, 1.6 s | Or adjustable | |||
| Supply Current (Excludes IOUT) | 1 | 1.95 | mA | IOUT = 100 mA | |
| Supply Current in Battery Backup Mode | 0.6 | 1 | µA | VCC = 0 V, VBATT = 2.8 V | |
| Operating Temperature Range | -40 | 85 | °C | ||
| No. of Pins | 16 | NSOIC package |
Key Features
- Low Power Consumption: The ADM691A has a low standby current of 1 mA and a battery standby current of 0.6 to 1 µA.
- Precision Voltage Monitor: The device features a precision voltage monitor with a reset threshold voltage of 4.65 V ± 3%.
- Adjustable Reset and Watchdog Timeout: The reset time delay and watchdog timeout periods are adjustable, providing flexibility in system design.
- Battery Backup Switching: Automatic battery backup switching ensures continuous operation during power failures.
- Fast Onboard Gating of Chip Enable Signals: The device supports fast onboard gating of chip enable signals, enhancing system performance.
- CMOS RAM Write Protection: It includes CMOS RAM write protection to safeguard data during power transitions.
Applications
- Microprocessor Systems: The ADM691A is widely used in microprocessor-based systems to ensure reliable power supply monitoring and battery control.
- Computers and Controllers: It is suitable for use in computers, controllers, and other digital systems requiring robust power management.
- Intelligent Instruments: The device is used in intelligent instruments where precise power monitoring and control are essential.
- Automotive Systems: It is applied in automotive systems for critical power monitoring and battery management.
- Critical Power Monitoring: The ADM691A is used in various applications requiring critical power monitoring and backup battery switchover.
Q & A
- What is the primary function of the ADM691A?
The primary function of the ADM691A is to provide power supply monitoring and battery control functions in microprocessor systems, including microprocessor reset, backup-battery switchover, watchdog timer, and power-failure warning.
- What is the reset threshold voltage of the ADM691A?
The reset threshold voltage of the ADM691A is 4.65 V ± 3%.
- What are the operating temperature ranges for the ADM691A?
The operating temperature range for the ADM691A is -40°C to +85°C.
- What is the typical reset time delay of the ADM691A?
The typical reset time delay of the ADM691A is 200 milliseconds, but it is also adjustable.
- Does the ADM691A support battery backup switching?
Yes, the ADM691A supports automatic battery backup switching to ensure continuous operation during power failures.
- What is the standby current of the ADM691A in battery backup mode?
The standby current of the ADM691A in battery backup mode is 0.6 to 1 µA.
- What package types are available for the ADM691A?
The ADM691A is available in 16-lead narrow SOIC packages.
- Does the ADM691A provide CMOS RAM write protection?
Yes, the ADM691A includes CMOS RAM write protection to safeguard data during power transitions.
- What are some common applications of the ADM691A?
The ADM691A is commonly used in microprocessor systems, computers, controllers, intelligent instruments, automotive systems, and critical power monitoring applications.
- Is the ADM691A RoHS compliant?
Yes, the ADM691A is RoHS compliant.
