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VT5376 bảng dữ liệu(PDF) 24 Page - STMicroelectronics

tên linh kiện VT5376
Giải thích chi tiết về linh kiện  Ultra-low power laser motion sensor for laser mouse applications
PDF  30 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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VT5376 bảng dữ liệu(HTML) 24 Page - STMicroelectronics

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8.1
Overall 2.4 GHz mouse power consumption example
Assumptions
●
VCSEL, MCU and 2.4 GHz Tx operate from 2.2 V
●
MCU consumes 1 mA in running mode and 50 uA in standby mode. In no motion
period, it remains in standby until it receives an interrupt from the VT5376, indicating
that MOTION has been detected.
●
2.4 GHz Tx consumes 10 mA, but data is sent by bursts of 500 µs every 5 ms (that is
Nordic nRF2402).
●
Maximum current is delivered to VCSEL (10 mA strobed).
●
DCDC efficiency is 70%
●
Ambient temperature
Using STMicroelectronics battery life model, these values would enable the mouse to
operate for 12 months from two AA batteries in parallel.
Table 8.
Power supply and typical power consumption
Run
IDLE1
IDLE2
SLEEP
4000 fps
2000 fps
1000 fps
Total @Vbat (1.25 V)
18 mA
12 mA
9.3 mA
0.59 mA
0.29 mA
0.24 mA



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