2 conducted noise, 3 voltage tolerance, Conducted noise – Seagate CONSTELLATION ES SERIAL ATA ST31000524NS User Manual
Page 19: Voltage tolerance, Figure 1, Typical 5v startup and operation current profile, Figure 2, Typical 12v startup and operation current profile
Constellation ES Serial ATA Product Manual, Rev. F
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Figure 1. Typical 5V startup and operation current profile
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.
• 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 ±10%