Specifications

System Specification
110124-30002, preliminary
23
Audio Interface
The VGA options board includes an IDT 92HD71B8 4-channel HD audio codec providing
an audio option for the Helios platform. For additional information, see Multimedia Cards,
page 18.
Symbol
Parameter
Min
Typ.
Max
Units
D
VDD
Codec digital supply voltage 3.3 V
A
VDD
Codec analog supply voltage 3.3 V
f
S
Sample rate 192 kHz
--- A/D sample resolution 24 bit
Line In, Microphone
V
IN
Full scale input voltage 1.00 1.03 V
rms
Gain
IN
Microphone boost 0 30 dB
R
IN
Input impedance 50 kΩ
C
IN
Input capacitance 15 pF
Line Out
V
OUT
Full scale output voltage 0.707 0.758 V
rms
P
UT
Headphone output, 32Ω load 31 42
mW
(peak)
SATA Drive
The following table lists the specification for the optional SATA drive. For additional
information, see SATA Drive, page 17.
Parameter Min Typ. Max Units
Transfer rate (SATA2) 300 MBps
Power consumption (seek) 3 W
Power consumption 1 W
EMI/EMC
The Helios platform is designed to meet the EMI/EMC requirements listed in the following
table. The external USB wireless devices are covered by separate qualifications.
Requirement Characteristic Condition/Comments
EN 55022/CISPR22 Emissions Sub-clause 8.2 - EN 55022/CISPR 22 for class B
device - Radiated emissions for 30 MHz – 1 GHz
EN 55022/CISPR22 Immunity Sub-clause 9.3 - EN61000-4-2 - Electrostatic
discharge.
Sub-clause 9.2 - EN 61000-4-3 - Radiated immunity
FCC CFR47 Part 15/B Emissions Rules 15.101-109