CNW138S

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Optoisolators - Transistor, Photovoltaic Output, are made up of an infrared light-emitting diode (LED) which is integrated in a phototransistor circuit to provide isolation from electrical signals. This type of optoisolator is used as a means of signal transmission security from one circuit to another, similar to a fiber optic cable. The CNW138S is an optocoupler device and is designed as a high-performance, low-cost device with an operating speed up to 500 kHz.

The CNW138S utilizes an incredibly fast rise time of 50 ns typical with its wide frequency response, in combination with excellent common mode rejection, to ensure superior performance over a 2.7- to 5-V operating range. It operates at 3.3-V or 5-V DC supply voltage and has a forward voltage of 1.2 V (min), and an equivalent series impedance of 18 Ω (max).

The CNW138S is a monolithic integrated component with a photo sink collector output. Its output collector configuration is designed to provide a high channel current to improve data transfer performance. It uses a detector current (I DET ) to measure its collector current and sets its threshold so that its output can transition quickly. The off-state collector-emitter voltage is loaded with a highly reliable zener diode to realize small on-state loading.

The basic operation of the CNW138S optocoupler is as follows. When .5 mA of the LED current passes through the device, the LED emits an infrared light and the emitted light is detected by the phototransistor. The device operates as a photo-conductivity switch, which allows the device to be switched on and off. When the switch is on, the current flows through the phototransistor in the collector terminal and the collector current is detected by the LED current supply. The LED current supplies the LED current with a certain amount of current so that an equivalent data transfer can be achieved with relatively small output voltage.

In terms of applications, the CNW138S optocoupler is best suited for applications such as power supply isolation, digital signal filtering and linearizing, and low-cost high-speed data streaming. It can also be used in low-power consumer electronics and industrial automation systems due to its superior amount of signal isolation. Furthermore, with its ability to convert current signals to optical signals, the device can be used as an effective signal converter, making it highly compatible with multiple applications.

In conclusion, the CNW138S Optoisolator - Transistor, Photovoltaic Output is a high-performance, low-cost device with superior performance over a wide frequency range and an incredibly fast rise time. Its ability to isolate current signals and convert them to optical signals makes it highly compatible with many applications such as power supply isolation and signal filtering. This device is an ideal solution for a variety of applications, and manufacturers, technicians, and engineers will find this device to be an invaluable asset to their projects.

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