ADM708TAR

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PMIC- Supervisors, also known as reset ICs, are incorporated in most electronics systems in a variety of ways. These ICs are used to protect sensitive systems from misbehaving applications and power supply discrepancies. They can detect a failure to boot up or an irregular voltage and can reset the system autonomously. Among these supervisors, the ADM708TAR functions as an ultra-low-voltage (1.4V) reset IC, making it a perfect choice for power-sensitive applications.

ADM708TAR Overview

The ADM708TAR is a voltage supervisor with an integrated precision voltage reference, enabling micropower operation with a supply current of only 300nA. This chip boasts a reset delay accuracy of +/- 1%, which is far better than any other reset IC. It offers a wide operating range of 1.4V to 6V and its ability to tolerate up to 6V makes it the go-to solution for a variety of industrial applications. The IC is available in a space-saving SOIC-14 package.

Application Fields

The ADM708TAR is ideal for power-sensitive industrial applications with narrow voltage rails and a need for reset accuracy. Applications include motherboard and avionics systems, optical storage systems, embedded system designs, portable electronics, and industrial transducer systems. Owing to its long reset delay accuracy, it is also suitable for high-precision instrumentation systems, as well as applications requiring low power operation.

Working Principle

The ADM708TAR uses a precision voltage reference and comparator to accurately detect input voltages. The voltage reference is connected directly to the chip and is used to set the reset threshold. The reset delay can be adjusted with an RC network and a timing capacitor, ensuring a delay that suits the application. The chip features an active low open drain output, and the reset signal is asserted when the input voltage falls below the reset threshold. The output is reset when the input rises above the reset threshold. The chip also features an input fail-safe architecture that ensures an output reset in the event of any accidental open circuit on the output.

Conclusion

The ADM708TAR reset IC is ideal for low voltage applications, offering reliable reset and delay operations. Its integrated precision voltage reference and fail-safe architecture ensure a precision reset for power-sensitive applications. With an operating voltage range of 1.4V to 6V and low supply current of 300nA, the ADM708TAR is the perfect choice for a number of industrial applications.

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