H11A1S1(TB)-V

Optoisolators - Transistor, Photovoltaic Output

The H11A1S1(TB)-V is a product of Opto transistor photovoltaic output. It is a very compact package with a 5-lead outline that provides higher-speed logic outputs with extended-current capability. This device contains a gallium arsenide infrared emitting diode optically coupled to a high-gain photo-darlington output transistor.

Application Field

The H11A1S1(TB)-V provides digital-to-analog or analog-to-digital isolations for various applications, such as in industrial process monitoring instruments where it can be used to drive LED and lamp displays, in microcomputer terminals and systems working in harsh environments. It is also widely used as an optocoupler for detecting supply current and temperature, especially in monitoring systems. The H11A1S1(TB)-V offers an economical solution for fast and reliable signals transmissions and level conversions between digital devices and other isolated circuits.

Working Principle

The working principle of the H11A1S1(TB)-V is based on the electrical isolation between its input and output. It contains a gallium arsenide infrared LED which emits light when current passes through it. The light is then received by a high gain photo-Darlington transistor, which produces an amplified output corresponding to the input. As the light is isolated from the supply, circuit resistance and capacitance, the signal received is clear and reliable. This output can then be used to activate an external optical circuit or save it as a logic state.

In addition, the optocoupler facilitates the transmission of digital signals and low-level analog voltage signals between differing parts of an electronic device. The data of input signals are preserved reliably throughout the device, and its noise immunity ensures a high signal quality output. The H11A1S1(TB)-V also features a wide and adjustable operating temperature range and high switching speed.

Conclusion

The H11A1S1(TB)-V is a simple yet reliable device for providing electrical isolations between applied and driven signals. It is suitable for applications that require fast and reliable signals transmission and level conversion, and for use in monitoring systems, displays and microcomputer terminals.