Light to Frequency Converter TSL220

A large area photodiode and current-to-frequency converter integrated into a clear plastic 8-pin DIL package. The output generates a pulse train whose frequency is directly proportional to the light intensity. It is CMOS compatible (a 3.3kΩ pulldown resistor is recommended for driving LS TTL), and the frequency can be measured using pulse counting, period timing, or integration techniques. The photodiode features a wide dynamic range, high sensitivity, and excellent noise immunity. The output frequency range is set by a capacitor, varying from 10pF to 100pF, allowing the output frequency to adjust to a suitable range based on the light intensity.

The photodiode and current-to-frequency converter module is designed for applications requiring precise light intensity measurements. The integration of the photodiode with the current-to-frequency converter in an 8-pin DIL package facilitates easy implementation in various electronic systems. The output pulse train generated by the device is a direct representation of the light intensity, making it suitable for applications such as ambient light sensing, optical communication, and scientific instrumentation.

The CMOS compatibility of the output allows it to interface seamlessly with a variety of digital circuits, ensuring versatility in design. The suggested 3.3kΩ pulldown resistor is crucial for maintaining the integrity of the signal when interfacing with LS TTL logic levels, ensuring reliable operation across different electronic platforms.

The adjustable output frequency range, controlled by an external capacitor, enables customization based on specific application requirements. By selecting a capacitor value between 10pF and 100pF, the designer can tailor the frequency response to optimize performance for varying light conditions. This feature enhances the device's usability in environments with fluctuating light levels, ensuring accurate and consistent measurements.

Overall, this photodiode and current-to-frequency converter package offers a robust solution for light sensing applications, combining high sensitivity, wide dynamic range, and noise immunity with flexible output characteristics. Its compact design and ease of integration make it an ideal choice for modern electronic systems requiring reliable light intensity measurement.A large area photodiode and current to frequency converter combined in a clear plastic 8-pin DIL package. The output is a pulse train whose frequency is directly proportional to the light intensity. The output is CMOS compatible (use a 3k3 pulldown resistor to drive LS TTL) and the frequency can be measured by pulse counting, period timing or integration techniques.

The photodiode has a wide dynamic range, high sensitivity and high noise immunity. The output frequency range is determined by a capacitor in the range 10pf to 100pf, which permits the output frequency to fall within some suitable range for any given light intensity.