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2.5.1.1
Typical current profiles
Figure 1.
Typical 5V & 12V startup and operation current profile (4TB)
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 ± 5%
12V ± 5%
2.5.4
Extended Power Conditions - PowerChoice
Utilizing the load/unload architecture a programmable power management interface is provided to tailor systems for reduced
power consumption and performance requirements.
Seagate Enterprise NAS HDD Product Manual, Rev. A
TM
Drive specifications
8
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