vt5376 STMicroelectronics, vt5376 Datasheet - Page 4

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

Motion performance
1
Note:
1.1
1.2
1.2.1
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Motion performance
The sensor can operate with an LED or VCSEL, and when bundled with the appropriate
optics subsystem is able to track motion on a wide range of surfaces up to speeds of 1 m/s
(40 ips), and to detect acceleration of up to 20 g. The sensor achieves this top speed with
very low drift and high accuracy.
Although this device features an UltraLowPower motion detection machine, the power
saving has not been achieved by compromising tracking accuracy.
Technical specifications
Table 1.
1. Using internal boost converter controller. Otherwise, voltage supply ranges from 1.6V to 3.2V
Battery life management
The battery life management (in no motion state) can be done manually where the external
MCU is the master and controls the sensor state via its POWERDOWN pin.
Alternatively, the sensor can manage its own power states. In no motion, it will cycle through
IDLE and SLEEP modes automatically without any intervention from the MCU.
Therefore by using the sensor’s automatic power management, the MCU can be fully
switched OFF in the case of no motion allowing for extra power savings, and resulting in a
very simple driver firmware design.
In this mode the chip is woken-up by de-asserting the POWERDOWN pin. When doing so
both the analog and DCDC engines are woken up in a programmed sequence. The
POWERDOWN pin can be de-asserted straight away as the sensor undergoes just a single
frame sequence.
Resolution
Pixel size
Array size
Frame rate
Tracking performances
Supply voltage
Operating temperature
Package type
Manual power management via POWERDOWN pin
Parameter
Technical specifications
Programmable up to 3200 CPI
30.4µm
20*20 pixels
up to 4000 fps
LED or Laser: 1m/s
Very low drift.
1 V to 1.6 V
0°C to 60°C
7 mm x 7 mm x 1.4 mm 32 lead LOQFP
(Low profile Optical Quad Flat Pack)
(1)
Description
VT5376