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Supply Voltages and I/O levels
Table 3 - Supply Voltages and I/O Levels
Item
VCC
VCC ILLUM
I/O level
Power Supply Noise
To preserve image quality (both for decoding and image capture applica-
tions), a low-noise power supply is required.
The requirement for the power supply peak-to-peak noise is ≤150mV on
the power supply lines (or at least on the "VCC" supply), the lower the better.
Integration Guide
Electrical Integration
Level
Description
This is the core digital and analog power sup-
ply. The device full operation is guaranteed in
this range of voltage (compatible with USB
powering).
3.2 V – 5.5 V
Important note: This power can go as low as
3.0 V, but at power-up the minimum allowed
voltage is 3.2 V, in order to guarantee the
proper system startup.
This is the illumination power source; can be
connected to a power supply independent
3.0 - 5.5 V
from VCC, if desired. 5V achieves best power
efficiency.
The driving capability of the output pins is 4
mA max. The internal engine digital supply is
V
min = 3.0 V
IOH
3.3 V.
V
nom = 3.3 V
IOH
The I/O output voltage is 3.3 V nominal. If the
V
max = 3.6 V
IOH
main power VCC is not applied the input pins
should not be driven.
Chapter 3
7
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