ISO7320CQDQ1

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Digital isolators saturate applications, emerging as a robust and practical alternative to the traditional electromechanical relays and optocouplers to allow signals and power to cross from the side of the circuit that is not galvanized to the side of the circuit that is galvanized. Of all research and development efforts in the field of signal and power isolation, one iso signal isolator stands out for its ultra-small size and long product cycle - the ISO7320CQDQ1.

The ISO7320CQDQ1 is a monolithic IC with an integrated transformer inside the isolator package, enabling AC/DC signal and power isolation up to 250 V peak voltage. The transformer, possessing a maximum isolation voltage of 10 kV, is specially designed and optimized to ensure a high isolation margin from undesirable side effects, providing a noise immunity of >100 dB up to 400 kHz. The power transfer capabilities and ability to achieve low on-resistance (Ron < 0.1 Ohms) and low input capacitance (Cin < 0.5 pF) are three key features of the ISO7320CQDQ1.

The ISO7320CQDQ1 contains all the principal building blocks for signal and power isolation including: device control/status pins,power isolation cell, signal isolation cell and protection circuitry.Device control/status pins incorporate an integrated lockout function that enables disabling the ISO7320CQDQ1 when a temporary signal or power interruption is needed. In addition, this digital isolator also has self-protection features such as temperature and over current protection.

The device\'s exceptional power transfer characteristics enable it to isolate efficiently signals operating in a frequency range of up to 1 MHz, perfectly suitable for low speed industrial communication networks such as CAN, RS232/485, Ethernet, and 3GPP buffers. The same insulation barrier also reduces independent electrical noises, resulting in improved signal quality.This device also can be used as a voltage/current isolator in circuits controlling appliances like lamps or motors.

On the other hand, the ISO7320CQDQ1 has notable security aspects. It features a high voltage(6000V) breakdown voltage across the PC board to protect system devices in the case of a cable or board failure. Additionally, the device is able to transmit data securely thanks to its high signal-to-noise ratio (SNR). Furthermore, the device incorporates gate drive capability up to 500V/8mA enabling it to safely control signals up to 1000V.

The ISO7320CQDQ1 then delivers a maximum of 500 mW of power under normal operation and additionally offers up to 0.4 W of power at extremely low power operation.Overall, the concept of digital isolators powered by embedded transformers is becoming more and more relevant for the future of signal and power isolation to alternate electromechanical relays and optocouplers.

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