Seagate ST33000652NS User Manual
Constellation ES.2 Serial ATA Product Manual, Rev. D
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Figure 2. Typical 12V startup and operation current profile
3.8.2
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.
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.
3.8.3
Voltage tolerance
Voltage tolerance (including noise):
5V ± 5%
12V ± 5%