Overview
The ADM697ARZ is a microprocessor supervisory circuit produced by Analog Devices Inc. This IC is designed to provide comprehensive power supply monitoring and battery control functions in microprocessor systems. It is available in a 16-pin SOIC package and operates within a voltage range of 3.0V to 5.5V. The ADM697ARZ ensures system reliability by managing power-on reset, backup-battery switchover, watchdog timer, and CMOS RAM write protection.
Key Specifications
| Parameter | Min | Typ | Max | Units | Test Conditions/Comments |
|---|---|---|---|---|---|
| VCC Operating Voltage Range | 3.0 | - | 5.5 | V | - |
| VBATT Operating Voltage Range | 2.0 | - | VCC - 0 | V | - |
| Supply Current (Excludes IOUT) | 1 | 1.95 | 1.95 | mA | IOUT = 100 mA |
| Reset Timeout | 35ms | - | - | - | Minimum |
| Voltage - Threshold | 1.3 | - | - | V | - |
| Operating Temperature | -40°C | - | 85°C | - | TA |
| Package / Case | - | - | - | - | 16-SOIC (0.295", 7.50mm Width) |
Key Features
- Integrated Microcontroller Support: The ADM697ARZ is designed to work seamlessly with microprocessors, providing essential supervisory functions.
- Power-On Reset: Generates a reset signal during power-up, power-down, and brownout conditions. The reset voltage threshold is adjustable using an external voltage divider.
- Watchdog Timer: Includes a watchdog timer that can be set to various time periods. If the watchdog timer is not toggled within the specified time, a reset pulse is generated.
- Battery Backup Switching: Provides battery backup switching for CMOS RAM or other low-power logic circuits.
- CMOS RAM Write Protection: Ensures the integrity of data in memory by preventing write operations when the supply voltage is below the threshold voltage.
- Power Failure Warning: Includes a 1.3V threshold detector for power fail warning, low battery detection, or monitoring other power supplies.
- Low Power Consumption: Operates with low power consumption of 5 mW and fast chip enable gating of 5 ns.
Applications
- Brownout Condition Handling: The ADM697ARZ can handle brownout conditions by providing a reset signal when the supply voltage drops below a certain threshold.
- External Voltage Divider Use: Allows the use of an external voltage divider to adjust the reset threshold voltage.
- Battery Backup Switching: Ideal for systems requiring battery backup for CMOS RAM or other low-power logic circuits.
- Microprocessor Systems: Suitable for use in various microprocessor-based systems that require robust power supply monitoring and control.
Q & A
- What is the operating voltage range of the ADM697ARZ?
The ADM697ARZ operates within a voltage range of 3.0V to 5.5V.
- What type of package does the ADM697ARZ come in?
The ADM697ARZ is available in a 16-pin SOIC package.
- Does the ADM697ARZ have a watchdog timer?
Yes, the ADM697ARZ includes a watchdog timer that can be set to various time periods.
- What is the purpose of the power failure warning feature?
The power failure warning feature, using a 1.3V threshold detector, is used for power fail warning, low battery detection, or monitoring other power supplies.
- How does the ADM697ARZ protect CMOS RAM?
The ADM697ARZ ensures the integrity of data in CMOS RAM by preventing write operations when the supply voltage is below the threshold voltage.
- What is the minimum reset timeout of the ADM697ARZ?
The minimum reset timeout of the ADM697ARZ is 35ms.
- Is the ADM697ARZ RoHS compliant?
No, the ADM697ARZ is not RoHS compliant.
- What is the operating temperature range of the ADM697ARZ?
The operating temperature range of the ADM697ARZ is -40°C to 85°C.
- How much current can the ADM697ARZ supply in battery backup mode?
The ADM697ARZ can supply up to 100 mA in battery backup mode.
- What is the typical supply current of the ADM697ARZ?
The typical supply current of the ADM697ARZ is 1.95 mA.
