Overview
The ADM696ARZ, produced by Analog Devices Inc., is a microprocessor supervisory circuit designed to provide comprehensive power supply monitoring and battery control functions in microprocessor systems. This single-chip solution integrates multiple critical functions, including power-on reset, watchdog timer, CMOS RAM write protection, and power failure warning. The ADM696ARZ is fabricated using an advanced epitaxial CMOS process, ensuring low power consumption and high reliability.
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 | ||
| VOUT Output Voltage (IOUT = 1 mA) | VCC - 0.05 | VCC - 0.025 | VCC - 0.5 | V | |
| VOUT Output Voltage (IOUT ≤ 100 mA) | VCC - 0.25 | VCC - 0.5 | V | ||
| Supply Current (Excludes IOUT) | 1 | 1.95 | mA | IOUT = 100 mA | |
| Minimum Operating Temperature | -40 | °C | |||
| Maximum Operating Temperature | 85 | °C | |||
| Reset Delay Time | 50 | ms | |||
| Power Dissipation | 600 | mW |
Key Features
- Power-On Reset output during power-up, power-down, and brownout conditions with adjustable reset voltage threshold using an external voltage divider.
- Watchdog timer with reset pulse if the watchdog timer has not been toggled within the specified time.
- Separate watchdog time-out and low line status outputs.
- Adjustable reset and watchdog timeout periods.
- A 1.3 V threshold detector for power fail warning, low battery detection, or monitoring a power supply other than VCC.
- Battery backup switching for CMOS RAM, CMOS microprocessor, or other low power logic.
- Write protection of CMOS RAM or EEPROM (ADM697 model).
- Low power consumption of 5 mW and fast Chip Enable gating of 5 ns.
- High reliability and minimal voltage drop in power switching circuitry, allowing up to 100 mA output current without an external pass transistor.
Applications
The ADM696ARZ is suitable for a variety of applications in microprocessor systems, including:
- Power supply monitoring and battery control in embedded systems.
- CMOS RAM and microprocessor backup during power failures.
- Watchdog timer functions to ensure system reliability.
- Power fail warning and low battery detection in portable devices.
- Industrial control systems requiring robust power management.
Q & A
- What is the primary function of the ADM696ARZ?
The primary function of the ADM696ARZ is to provide power supply monitoring and battery control functions in microprocessor systems. - What types of packages are available for the ADM696ARZ?
The ADM696ARZ is available in 16-pin DIP and small outline packages (SOIC-16). - What is the operating voltage range for VCC?
The operating voltage range for VCC is 3.0 V to 5.5 V. - Does the ADM696ARZ have a watchdog timer?
Yes, the ADM696ARZ includes a watchdog timer with adjustable timeout periods. - What is the purpose of the 1.3 V threshold detector?
The 1.3 V threshold detector is used for power fail warning, low battery detection, or monitoring a power supply other than VCC. - Can the ADM696ARZ provide battery backup for CMOS RAM?
Yes, the ADM696ARZ can provide battery backup switching for CMOS RAM and other low power logic. - What is the maximum supply current of the ADM696ARZ?
The maximum supply current (excluding IOUT) is 1.95 mA. - What are the operating temperature ranges for the ADM696ARZ?
The operating temperature range is from -40°C to +85°C. - Does the ADM696ARZ support manual reset?
No, the ADM696ARZ does not support manual reset. - What is the typical reset delay time for the ADM696ARZ?
The typical reset delay time is 50 ms.
