Overview
The ADM696AR, 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, battery backup switching, and power failure warning. The ADM696AR is particularly useful in ensuring reliable operation of microprocessors under various power conditions, including power-up, power-down, and brownout scenarios.
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 | mA | IOUT = 100 mA | |
| Standby Current | 600 | nA | |||
| Reset Voltage Threshold | Adjustable | V | Using external voltage divider | ||
| Watchdog Timeout Period | 100 ms | 1.6 s | Adjustable | s | |
| Power Fail Detection Threshold | 1.3 | V | |||
| Operating Temperature Range | -40 | 85 | °C | ||
| Package Type | 16-pin DIP, SOIC |
Key Features
- Power-On Reset Output: Provides reset output during power-up, power-down, and brownout conditions, operational with VCC as low as 1 V.
- Watchdog Timer: Generates a reset pulse if the watchdog timer is not toggled within the specified time (100 ms, 1.6 s, or adjustable).
- Battery Backup Switching: Automatically switches to battery backup for CMOS RAM, CMOS microprocessor, or other low power logic.
- Power Fail Detection: Includes a 1.3 V threshold detector for power fail warning, low battery detection, or monitoring a power supply other than VCC.
- Low Power Consumption: Operates with a low supply current of 1.95 mA and a standby current of 600 nA.
- High Reliability: Fabricated using an advanced epitaxial CMOS process, ensuring minimal voltage drop and high reliability.
Applications
- Microprocessor Systems: Ensures reliable operation of microprocessors in various applications.
- Computers and Controllers: Suitable for use in computer systems and control units.
- Intelligent Instruments: Used in intelligent instruments that require precise power monitoring.
- Automotive Systems: Applicable in automotive systems where robust power monitoring is crucial.
- Critical Power Monitoring: Ideal for applications requiring critical power monitoring and control.
Q & A
- What is the primary function of the ADM696AR? The primary function of the ADM696AR is to provide power supply monitoring and battery control functions in microprocessor systems.
- What are the operating voltage ranges for VCC and VBATT? The VCC operating voltage range is 3.0 V to 5.5 V, and the VBATT operating voltage range is 2.0 V to VCC.
- How does the watchdog timer function? The watchdog timer generates a reset pulse if it is not toggled within the specified time (100 ms, 1.6 s, or adjustable).
- What is the purpose of the power fail detection feature? The power fail detection feature includes a 1.3 V threshold detector for power fail warning, low battery detection, or monitoring a power supply other than VCC.
- What are the package options for the ADM696AR? The ADM696AR is available in 16-pin DIP and SOIC packages.
- What is the standby current of the ADM696AR? The standby current is 600 nA.
- How does the battery backup switching work? The ADM696AR automatically switches to battery backup for CMOS RAM, CMOS microprocessor, or other low power logic when VCC is below VBATT.
- What is the operating temperature range of the ADM696AR? The operating temperature range is -40°C to 85°C.
- Can the reset voltage threshold be adjusted? Yes, the reset voltage threshold can be adjusted using an external voltage divider.
- What is the maximum output current drive of the ADM696AR? The maximum output current drive is up to 100 mA without the need for an external pass transistor.
