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2.5.1.1
Typical current profiles
Figure 1.
Typical 12V startup and operation current profile
2.5.2
Conducted noise
Input noise ripple is measured at the host system power supply across an equivalent 80-ohm resistive load on the +12 V line or an
equivalent 15-ohm resistive load on the +5V line.
• Using 12V power, the drive is expected to operate with a maximum of 120mV peak-to-peak square-wave injected noise at up to
10MHz.
• Using 5V power, the drive is expected to operate with a maximum of 100mV peak-to-peak square-wave injected noise at up to
10MHz.
Equivalent resistance is calculated by dividing the nominal voltage by the typical RMS read/write current.
Note
2.5.3
Voltage tolerance
Voltage tolerance (including noise):
5V +10/ -5%
12V ± 10%
Seagate SkyHawk Serial ATA Product Manual, Rev. B
9
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