vt5376 STMicroelectronics, vt5376 Datasheet - Page 20

• Manufacturer Part Number: vt5376
• Description: Ultra-low Power Laser Motion Sensor For Laser Mouse Applications
• Manufacturer: STMicroelectronics

Typical application
8.1
20/24
Overall 2.4GHz mouse power consumption example
Assumptions
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Table 8.
1. No motion for 50 ms
2. No motion for 8 seconds
3. No motion for 10 minutes
Using STMicroelectronics battery life model, these values would enable the mouse to
operate for 54 weeks from 2 AA batteries in parallel.
Total @Vbat (1.25 V)
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
Power supply and power consumption
4,000 fps
18 mA
2,000 fps
12 mA
Run
1,000 fps
9.3 mA
IDLE1
0.59 mA
(1)
IDLE2
0.29 mA
(2)
SLEEP
0.24 mA
VT5376
(3)