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Optoisolators - Transistor, Photovoltaic Output

The LDA100STR is a transceiver module developed by IdaTech for use in a variety of applications, such as select-off switching, position sensing, or as a sensor interface. It consists of an LED light source and a self-contained optical receiver that employs a photo-transistor as the sensing element. The module has an input current of 2mA to 4mA and an output current of 12mA to 20mA.

The main benefit of the LDA100STR is its ability to isolate digital signals, while still providing reliable, low-cost data transmission with low data latency. The opto-isolator module does this by using a light-emitting diode (LED) to transmit the signal, a phototransistor to detect the signal, and a transformer to isolate the two signals.

The LED generates a signal optical signal that is received by the phototransistor, which acts as an amplifier. This amplifies the signal and the amplified signal is sent back to the electrical input circuit via a transformer. This provides a high-impedance isolation barrier between the input and output signals, preventing electrical noise or surges from affecting the signal\'s performance.

The LED output of the LDA100STR consists of a low frequency sine wave of about 100 kHz, and the output of the phototransistor is a square wave (low or high). The sine wave output is used to modulate the LED, while the square wave is used to distinguish between "on" and "off" states. The opto-isolator also uses frequency modulation (FM) to ensure reliable data transmission.

The LDA100STR has many uses in a variety of industrial and home applications, including machine control, electric motor positioning, smart home automation, and secure power systems. It can also be used in audio applications such as microphone and headset audio isolation. The opto-isolator is designed to be reliable and power efficient, with a working temperature range of 10 to 70°C and a power consumption rating of about 0.5 watts.

In addition to the benefits of high isolation and low latency, the LDA100STR is also cost-effective. This makes it an attractive opto-isolator for a variety of digital signal processing applications. Its ability to provide high-impedance isolation makes it well-suited for separating control signals from power signals, and its use of frequency modulation for reliable data transmission means that it can be used for high-volume data transmission.

The LDA100STR is part of a series of opto-isolator modules produced by IdaTech, and it is an ideal solution for applications requiring reliable digital signal transmission that is also cost-effective.

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