Seagate Exos 7E8 SATA Product Manual, Rev. B
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2.5.1.3
Typical current profiles
Figure 3.
2TB Typical 5V and 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.
2.5.3
Voltage tolerance
Voltage tolerance (including noise):
5V +10/ -5%
12V ± 10%
Note
Equivalent resistance is calculated by dividing the nominal voltage by the typical RMS read/write current.
