ADM809-5LAKS-REEL

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Modern integrated circuits require protection mechanisms against a multitude of fault conditions that could possibly occur during their operation. A supervisor integrated circuit (IC) is designed to satisfy this need by monitoring the system and issuing an alert if any of the conditions is detected. The ADM809-5LAKS-REEL is a supervisory IC from Analog Devices which is versatile and reliable for monitoring power and protecting against a wide range of fault conditions.

Features

The ADM809-5LAKS-REEL is offered in a miniature 14-pin surface mount package. The device has two operating ranges, a 0.76 V to 5.5 V range and a 0.6 V to 5.5 V range. It has supervisions for power up/power down, sense A and sense B. The other features of the DC are:

• Low power consumption
• Adjustable delay time
• Wide supply voltage range: 0.75 V to 5.5 V
• Interrupt and SENSE outputs
• Internal power-on-reset (POR) generator
• Supports an external reset pin
• Available in a space saving 14-pin package

Applications

The ADM809-5LAKS-REEL is ideal for applications that require system supervisions, power on/off control, and poor power monitoring. The device is applicable in many industrial and commercial applications which include:

• Industrial process control
• Communication equipment
• Microprocessor-based systems
• Consumer electronics
• Medical monitoring systems

Working Principle

The ADM809-5LAKS-REEL is a dual-range micro-power supervising IC that provides a power-on/power-off reset (POR) output, a SENSE output, and an interrupt output. The device monitors the power supply and provides power-on/power-off reset (POR) when the supply voltage falls out of tolerance height. The ADM809-5LAKS-REEL also monitors two supplied voltage levels, namely sense A and sense B, and provides interrupt output when any one of the two is out of range.

The ADM809-5LAKS-REEL has an adjustable timeout delay feature. The device issues a reset pulse when the set delay time is exceeded. The pulse duration can be adjusted via a single external capacitor and has a typical time range of 4 ms to 192 ms. The device\'s reset output stays low even after the power loss or brown-out condition has disappeared.

The POR output of the ADM809-5LAKS-REEL is an open-drain output, which can be used to drive an external circuit to initiate a power up/power down sequence, or to reset microprocessors and other logic circuits. The SENSE output is an open-drain output that can be used to indicate an overload/underload, an over-temperature and other fault conditions. The output goes high when an interrupt condition occurs.

Conclusion

The ADM809-5LAKS-REEL is a versatile Supervisory Integrated Circuit from Analog Devices, which is ideal for a wide range of applications that require system supervisions, power on/off control and poor power monitoring. The device has multiple protection features such as adjustable delay time, low power consumption, wide supply voltage range, and an internal power-on-reset (POR) generator among others. With its wide variety of features, the ADM809-5LAKS-REEL is a reliable and cost-effective solution for protecting against a wide range of fault conditions.

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