1 typical current profiles, 2 conducted noise, 3 voltage tolerance – Seagate ST3500312CS User Manual
Page 21: Conducted noise, Voltage tolerance, Figure 1, Typical 12v startup and operation current profile
Pipeline HD.2 Series SATA Product Manual, Rev. E
13
2.8.1.1
Typical current profiles
Figure 1. Typical 12V startup and operation current profile
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 12V 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%