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Si1142-A10-GM bảng dữ liệu(PDF) 9 Page - Silicon Laboratories |
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Si1142-A10-GM bảng dữ liệu(HTML) 9 Page - Silicon Laboratories |
9 / 66 page Si11 41/42/43 Preliminary Rev. 0.5 9 When operating in the lower signal range, it is possible to saturate the ADC when the ambient light level is high. Any overflow condition is reported in the RESPONSE register, and the corresponding data registers report a value of 0xFFFF. The host can then adjust the ADC sensitivity. Note however that the overflow condition is not sticky. If the light levels return to a range within the capabilities of the ADC, the corresponding data registers begin to operate normally. However, the RESPONSE register will continue to hold the overflow condition until a NOP command is received. Even if the RESPONSE register has an overflow condition, commands are still accepted and processed. Proximity detection ranges beyond 50 cm and up to several meters can be achieved without lensing by selecting a longer integration time. The detection range may be increased further, even with high ambient light, by averaging multiple measurements. Refer to “AN498: Designer's Guide for the Si114x” for more details. Figure 3. Typical Proximity Sense Performance Curves 5 7 9 11 13 15 17 19 21 23 25 0 500 1000 1500 2000 2500 3000 3500 4000 4500 PSLEDx_DATA 47%, Hand, 1 Lux 47%, Hand, 300 Lux Fluorescent 47%, Hand, 300 Lux Incandescent 18% Gray Card, 1 Lux 92% White Card, 1 Lux 5 10 15 20 25 30 35 40 45 50 0 5000 10000 15000 20000 25000 30000 PSLEDx_DATA 47%, Hand, 1 Lux 47%, Hand, 300 Lux Fluorescent 47%, Hand, 300 Lux Incandescent 18% Gray Card, 1 Lux 92% White Card, 1 Lux |
Số phần tương tự - Si1142-A10-GM |
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Mô tả tương tự - Si1142-A10-GM |
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