HMHA2801BR3V

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Optoisolators are optically coupled devices used to provide electrical isolation between circuits. The HMHA2801BR3V is a commonly used opto-isolator part from Avago Technologies. It is a photovoltaic output opto-isolator, which uses an LED to transmit signals from the input side to the output side.

The HMHA2801BR3V consists of an infrared LED and a photosensitive MOSFET channel coupled in an optically isolated package. When powered up, the LED emits infrared light, which is received by the MOSFET’s photosensitive gate. This causes the MOSFET to turn on and off, thereby transmitting the signal from the input side to the output side.

The HMHA2801BR3V is primarily used in applications requiring circuit electrical isolation while passing signals from a controller to a remote device. Examples include PLCs, frequency counters, thermostats, and automotive circuits. It is very stable and reliable since it operates at low signal levels and is not affected by power supply spikes.

One of the main advantages of the HMHA2801BR3V is its high common-mode rejection: it can reject noise from the input side and transmit a clean signal to the output side. It also has temperature compensation and can maintain a very high level of isolation between the input and output sides. In addition, it is relatively low-cost and does not require additional components in most applications.

The HMHA2801BR3V is a highly reliable opto-isolator. It has low power consumption and a wide operating temperature range (between -40°C to 150°C). It also has a high input impedance, allowing it to make use of higher signal frequencies in applications. An integrated clamping diode further increases its reliability and immunity to noise.

In conclusion, the HMHA2801BR3V is a photovoltaic output opto-isolator, suitable for applications requiring circuit electrical isolation while passing signals from a controller to a remote device. It is relatively low-cost and easy to use, and its high common-mode rejection and built-in protection ensure stable, reliable operation.

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