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2022-09-21 17:24:28
ISL29020 low power, high sensitivity with the digital sensor with the I2C interface
ISL29020 is a sensor with a low -power, high -sensitivity integrated light with I2C (SMBUS compatible) interface. Its most advanced photoelectric diode array provides eye response to human eyes and good infrared suppression. This ADC can inhibit 50 and 60 Hz flickering messages caused by artificial light. Lux range selection function allows users to optimize counting/Lax programming Lax. When running normally, the typical power consumption is 55 Wei'an has provided a power -off mode in order to further reduce the power consumption. If the continuous measurement of pollution light is selected, after the ADC is completed, the function is turned off and the entire chip measurement conversion is turned off. Another power shutdown mode is controlled by the software through the I2C interface. This should be shut down. The design for power supply from 2.25 volts to 3.3 volt I2C from 1.7V to 3.6V, ISL29020 is specified to run within the environment temperature range of -40 ° C to+85 ° C.
Features
Low-power-maximum working current 65 Weian-Maximum shutdown current 0.5 Weian-Software Close and Automatic Closing
Ideal spectrum disorder-close to human eye response-excellent infrared and ultraviolet suppression
Easy to use-simple output code-i2C (compatible with SMBUS) output-no complex algorithm-variable conversion conversion-variable conversion The resolution is as high as 16 bits-the adjustable sensitivity is as high as 65 meters per Lax-work under various light sources, including the sunlight-optional range (through I2C)-range 1 0.015 Lax to 1000 Lax-range 2 0.06 to 4000 to 4000 Lex-range 3 0.24 Lax to 16000 Lax-range 4 0.96 Lax to 64000 Lax ]
Additional features-I2C and SMBUS compatible-I2C interface 1.7V to 3.6V power supply -2.25 volts to 3.3 volt power-Address selection PIN lead (in line with ROHS)
] Display and keyboard dimming: -Craft device: smartphone, PDA, GPS-computing device: laptop computer, webpage-consumer equipment: LCD TV, digital photo frame, digital camera
Industrial and medical light sensing [ 123]
Absolute maximum rated value (TA +25 ° C) heat informationVDD power supply voltage between VDD and GND. 3.6 il
I2C bus pins voltage (SCL, SDA). -0.2 il to 3.6 volts
I2C bus pins (SCL, SDA). lt; 10 mia
Rext, A0Spinning voltage. -0.2V to VDD
Static discharge rated value
Human model. 2 kV
Thermal resistance θja (℃/tile)
6 LD ODFN. 88
Maximum temperature. +90 degrees Celsius
Storage temperature. -40 ° C to+100 ° C
The operating temperature. -40 ° C to+85 ° C
Lead -free return curve. 
Important Tips: Ensure all parameters with the smallest/maximum specifications. Typical values are for reference only. Unless there is another instructions, all the tests are performed at the prescribed temperature, so: TJ TC TA
Electrical specification VDD 3V, TA +25 ° C, Rext 500kΩ1%tolerance, 16 -bit bite ADC operation, unless there are other regulations
Note:
1. The production test uses 550nm green LED. Calibrate 550nm LED radiation degree to generate the same data counting level of 300 Lax fluorescent lamps.2.850Nm green LED for production testing. The 850NM LED radiation degree has been calibrated to generate the sunlight of 210 Lax.
Working principle
Optical diode and ADC
ISL29020 include two photoelectric diode array, which is used to convert light to transform current. The spectrum response and infrared induction of the environmental light are shown in Figure 8 . See page 9. During the transformation of the light to the light signal processing process