H11L2 Isolators

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Optoisolators – Logic Output choices are starting to come to the fore in new applications, where the goal is to keep the most digitally-sensitive signals from the digital side from ever being exposed to the potentially corruptible analog side. The H11L2, an optocoupler, is an example of an optoisolator intended for digitally sensitive logic output applications.

The insulating core of the optoisolator, in the form of a high-gain light-emitting diode (LED), is encircled by the body of the package that protects the LED against physical impacts, as well as from the environment. A phototransistor alongside the LED renders it light-sensitive, allowing the flow of electrons from the lowest electric potential to the highest electric potential, thereby isolating the input from the output side of the optoisolator.

Besides its analog to digital isolation capabilities, the features of the H11L2, sets it above the other available optoisolators. Its low power consumption (100 mW max), low input current (5 mA max) and differential input/output current (0.5 mA max) make it suitable for a wide array of applications. It also offers an operating temperature range of -40 °C to +85 °C without compromising on the fast response time for outputs (less than 5 microseconds).

The lead material (AgNi), its design as a single-ended type and the gain isolation (greater than 100000) suggest an ability to increase accuracy in interactions among the electrical signals of the input and output stages. It can also be used as an amplifier or as an optical interrupter.

One of the primary applications of the H11L2 is for providing digital outputs which must be accessible for switching or transmitting data in between the application board and the user interface. Generally used as electrical isolation amplifiers in computers, digital communications, industrial controllers, measurement systems, and digital audio equipment, they help in maintaining the integrity of signals. Its frequency range of 80 KHz to 3.6 MHz allows the user to switch between different frequencies or protocols as necessary.

The H11L2\'s versatility and robustness make it ideal for its intended purpose. It also meets UL 60950-1, UL 1577, EN 60950-1 and EN 50178 standards for digital isolation requirements. For applications such as AS-Interface and industrial controls, it offers a diverse set of solutions including security for communication networks as well as contact control. In other applications, such as consumer electronic products, they can also provide isolation across power supply and signal line.

The H11L2 device provides the user with a safe, reliable way to transmit electrical signals from the input side to the output side, without the risk of damaging the circuit. It is especially suitable for logic output applications, since its high speed response time and isolation reliability help provide a smooth transition between signal levels. It also reduces the amount of power consumed and the number of components needed for an isolated logic output signal.

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