Integration Guide

Electrical Interface
Integration Guide 15
Supply Voltages and I/O levels
Table 4. Supply Voltages and I/O Levels
VDD_SENSOR 3.3V ± 0.3
The image sensor power supply, from which the analog
power supply is also g
enerated. The value of 3.0V has to be
considered as an inferior limit, but for having superior
power supply noise immunity, a value above 3.15V is rec-
ommended
VDD 3.3V ± 0.3 The digital and laser aiming system power supply.
VDD_ILLUM_SYS 3.0V to 5.0V
The LED illumination system power supply.
I/O level 3.3V The typical high level for input and output signals.
Power supply noise
To preserve image quality (both for decoding and image capture applica-
tions), a low-noise power supply is required, particularly for VDD_SENSOR.
The requirement for the power supply peak-to-peak noise is ≤150mV on all
three power supply lines (the lower the better).
Item Level Description