Introduction

VT5365

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Introduction

The VT5365 sensor is a single-chip solid state optical tracking engine with no moving parts.

It allows the creation of a high performance, fully featured wireless mouse with the minimum

of external components. The device, which provides excellent navigation control and

precision, works on a wide range of surfaces.

The VT5365 incorporates features that simplify product design and reduce time to market.

By minimizing the number of external components, the mouse manufacturer has flexibility

for layout and product design.

ST has worked with optical component suppliers to produce a single piece light guide with

integrated lens, and makes recommendations for a compatible LED. Details of the optics

and LED are included in this document.

Figure 1.

VT5365 reference design mouse

1.1

Detailed overview

The VT5365 has been optimized for low power operation, enabling long battery life, which is

achieved by either a single 1.8 V or 2.0 V to 3.2 V supply.

The on-chip regulators allow for a wide range of power supplies taken from 2 batteries in

series, enabling a low cost BOM. However, for the most efficient power consumption, the

regulators can be bypassed so that the chip is driven at the minimal supply of 1.8 V by an

external power source (typically a DC/DC convertor from a single cell voltage). In both

cases, an on-chip DCDC regulator controls the LED, so that only a single 1.8 V supply is

required for the overall application. The supply scheme is selected by connecting an IO to

GND or VDD.