ISO7321CQDQ1

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Digital isolators are electronic devices for providing galvanic isolation between digital circuits, amplifying small signals, and providing signal regeneration. The ISO7321CQDQ1 is an example of one such device made by Texas Instruments. It is a CMOS logic photorelay specifically designed for digital isolation applications.

The ISO7321CQDQ1 offers a wide range of benefits that make it a great choice for a variety of digital isolation applications. Not only does it provide isolation between circuits, but it also amplifies and regenerates signals with levels as low as 1.6V logic level. This ensures that high performance and low-voltage digital systems are accurately provided with the necessary high-speed isolation.

The ISO7321CQDQ1 fits a wide range of applications, including power supplies, data acquisition systems, instrumentation, medical monitoring systems, audio/video switching systems, general purpose digital isolation, and motor control. It can be used to convert digital signals displayed on a CRT into electrical signals without the signal degrading or introducing noise.

The ISO7321CQDQ1 works on the principle of photo-coupling. The device consists of a photomosfet sensor and a photovoltaic cell. When a signal is applied to the sensor, it produces infrared light which is sensed by the photovoltaic cell. This causes a voltage to be generated that is the replica of the input signal in terms of amplitude, frequency, and phase without any galvanic connection. This voltage can then be output to a different circuit to provide electrical isolation.

The ISO7321CQDQ1 has a maximum data rate of 25MHz, a propagation delay time of 1.06ns, and an output current of 0.1mA. It features a wide range of operating temperature from –40°C to +85°C, making it perfect for applications which require high performance. The chip also meets JEDEC Standards, further reinforcing the reliability.

The ISO7321CQDQ1 is a fairly simple device but offers a great performance. Its advantages include isolated and amplified signals, reliability, wide range of working temperature, and low current consumption. These features make it a great choice for a variety of digital isolator applications.

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