VT5376(2007) View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

VT5376
(Rev.:2007)

Ultra-low power laser motion sensor for optical mouse applications

STMicroelectronics 

Motion performance

1

Motion performance

VT5376

Note:

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.

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Technical specifications

Table 1. Technical specifications

Parameter

Description

Resolution

Pixel size

Array size

Frame rate

Tracking performances

Supply voltage

Operating temperature

Package type

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 (1)

0°C to 60°C

7 mm x 7 mm x 1.4 mm 32 lead LOQFP

(Low profile Optical Quad Flat Pack)

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.

Manual power management via POWERDOWN pin

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.

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