Seagate ST3320311CS Pipeline HD.2 Series SATA Product Manual - Page 19

Typical current profiles, Conducted noise, Note., Voltage tolerance

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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% Pipeline HD.2 Series SATA Product Manual, Rev. G 13

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Pipeline HD.2 Series SATA Product Manual, Rev. G
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%