Conducted Noise; Voltage Tolerance; Figure 3. Typical 500Gb Model 5V & 12V Startup And Operation Current Profiles - Seagate Enterprise Capacity 3.5 HDD/Constellation ES Product Manual

500GB model current profile
Figure 3. Typical 500GB model 5V & 12V startup and operation current profiles
2.8.2

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.
Note.
Equivalent resistance is calculated by dividing the nominal voltage by the typical RMS read/write current.
2.8.3

Voltage tolerance

Voltage tolerance (including noise):
5V ± 5%
12V ±10%
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