VD5377 datasheet(8/88 Pages) STMICROELECTRONICS

8 / 88 page

Overview

VD5377

8/88

Doc ID 022952 Rev 2

1.1

Technical specification

1.2

VD5377 enhancements

The VD5377 has been optimized for optical finger navigation (OFN) applications. For

applications migrating from the previous VD5376 device, the following list highlights the key

differences:

•

optimized floor plan for improved module design

•

enhanced automatic power management mode: fully programmable sleep and wake-

up intervals

•

ultra-low powerdown mode (<1 µA)

•

user-selectable I2C addresses with the option to create custom start-up configurations

•

programmable polarity on external MOTION signal

•

power-on reset (POR) function gated on MOTION signal

•

unique Backlight controller: three PWM controlled LED drive outputs (10 mA)

•

enhanced performance in high ambient light conditions

•

new filter added to aid navigation in low contrast images

•

increased LED on-time for greater dynamic range

•

simplified support circuit: Rbin and Cosc components now integrated

•

smaller external capacitor on VREG (220 nF)

•

improved I2C frame capture

Table 1. Technical specification

Feature

Detail

Resolution

Programmable up to 3200 cpi

Pixel size

30.4 µm

Array size

20 x 20 pixels

Frame rate

Up to 4 kf/s (auto or manual)

Tracking performance

Up to 720 mm/s (28 in/s)

low drift, high accuracy

Supply voltage

2.2 V to 3.0 V using internal regulator or 1.8 V direct drive

Operating temperature

-20°C to 70°C

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