I. Product Overview:

️· Models: IS485 and IS486 are light sensors designed to detect ambient light levels. They likely differ in some characteristics (e.g., sensitivity, spectral response).
️· Application: These sensors are useful in applications needing light detection, such as automatic brightness control, ambient light sensing, and other light-dependent control systems.

II. Key Performance Characteristics (Derived from Charts & Data):

️· Spectral Sensitivity: The sensor is most sensitive to light in the visible spectrum (around 500-600nm, peaking around green-yellow). There's decreased sensitivity towards the blue and red ends of the spectrum. (See "Fig.10 Spectral Sensitivity").
️· Angular Sensitivity: Sensitivity varies depending on the angle of incident light. The sensor responds best to light hitting it directly. The charts show the sensitivity declining as the angle of light deviates from 0 degrees. (See "Fig. 9 Sensitivity Diagram").
️· Response Time: The sensor has a relatively fast response time, with rise and fall times (tr and tf) are in the sub-microsecond range (typically around 0.01µs). (See "Test Circuit for Response Time")
️· Propagation Delay: The time delay between light stimulus and electrical output is illustrated in "Fig. 7 Propagation Delay Time vs. Illuminance".
️· Load Resistance: The sensor’s response characteristics are affected by the load resistance used in the circuit. (See "Fig. 8 Rise Time, Fall Time vs. Load Resistance").
️· Voltage & Current: Charts illustrate the relationship between input voltage, output voltage, and current.
️· Supply Voltage: Based on the test circuits, it operates on a regulated voltage (likely 5V)

III. Charts and Figures Overview:

️· Fig. 7: Illustrates how propagation delay changes with illuminance.
️· Fig. 8: Shows the impact of load resistance on rise time and fall time.
️· Fig. 9: Displays the sensor's angular sensitivity.
️· Fig. 10: Shows the sensor's spectral response curve.
️· Test Circuits: Provides examples of test circuits used for measuring response time and other parameters.
️· Voltage/Current Charts: Depict voltage and current characteristics.



IV. Important Notes (From text):

️· Refer to the "Precautions for Use" section for proper handling and usage.

V. Key Differences between IS485 and IS486:

The document doesn't explicitly state the differences. However, some can be deduced:

️· Spectral Response: The diagrams may reveal slight differences in the spectral sensitivity curves between the two models.
️· Other Parameters: There may be minor variations in parameters like sensitivity, response time, or operating voltage.

In Summary:

The IS485 and IS486 are fast-responding light sensors with a peak sensitivity in the visible spectrum. They are suitable for applications requiring accurate light detection and fast response times. The provided charts and diagrams offer detailed insights into their performance characteristics.



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