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HCPL-7723-060E Optoisolator - Logic Output

The HCPL-7723-060E optoisolator - logic output is a single channel logic gate drive optocouplers. It combines a GaAsP LED, an input barrier between the LED and the Darlington transistor, an integrated circuit output driver, and an output transistor. It is designed for applications requiring high speed, high voltage isolation, and high noise immunity. It is compatible with TTL, CMOS, TTL-reversible, and other logic families. Additionally, the optocouplers can be used in combination with analog circuits, like comparators or other linear ICs.

The optocoupler consists of a gallium arsenide LED optically coupled with an integrated circuit driver circuit isolated from the input circuits. The LED side of the optocoupler provides a high speed switching response, with rise and fall times less than 5μs. It can drive an output voltage up to 30V, with a peak current up to 600 mA, making it suitable for applications with high voltage and/or high current requirements. The output side of the optocoupler includes an output driver circuit that provides high-speed clock speeds up to 100 MHz, and can be used with low-speed logic, as well as high speed logic drivers.

Application Fields

The HCPL-7723-060E optocoupler is suitable for applications that require high-speed logic outputs, or isolated analog signals, such as in the fields of motor control, computers, telecommunications, industrial control, consumer electronics, and signal transmission.

In motor control, the optocouplers can help isolate the motor drive from the motor controller. This ensures the motor drive is not affected by the controller’s internal circuit noise, and also aids in protecting the controller from motor current or voltage transients. This is especially important in the case of dc motors, since the amount of back electromotive force (EMF) generated when the motor current is interrupted can be large.

In computers, telecommunication, and consumer electronics, the optoisolators are used for many applications such as isolating digital logic circuits, providing isolated ground planes to digital and analog circuitry, and as barriers between high voltage sections of a circuit and the control circuitry.

Working Principle

The working principle of the HCPL-7723-060E optocoupler is as follows: the LED is forward-biased, and when it conducts, the input current illuminates the LED, triggering it to emit light. The emitted light passes through the photo-sensitive surface and is detected by the photodetector, which is typically a photodiode. When the photodetector senses the light, it generates an output current flow that activates the output component, which is typically a Darlington transistor. The output current of the output transistor is then used to drive a load, such as a relay.

The optocoupler is able to provide voltage and/or current isolation between its input and output circuits, which helps protect the input circuitry from output malfunctions or electrical noise. The input side of the optocoupler is typically electrically isolated from the output side. This isolation helps reduce electrical noise by preventing input currents from coupling back into the input circuits. Additionally, the optoisolator prevents undesired voltage and/or current feedback from the output circuit to the input side, which could potentially cause incorrect readings or performance problems.

The HCPL-7723-060E optocoupler is a single-channel optoisolator - logic output that is designed for a wide variety of applications requiring high-speed switching performance and high voltage and/or current isolation. It has a very short propagation delay and a propagation delay-capacitance ratio of less than 1.5 ns/mA and can handle up to 600 mA of peak output current. Combined with its high-speed clock speeds up to 100 MHz, this optocoupler is suitable for a variety of applications, including motor control, computers, telecommunications, industrial control, consumer electronics, and signal transmission.

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