Seagate ST3450757FC ユーザーズマニュアル
24
Cheetah 15K.7 FC Product Manual, Rev. C
7.2.1
Conducted noise immunity
Noise is specified as a periodic and random distribution of frequencies covering a band from DC to 10 MHz.
Maximum allowed noise values given below are peak-to-peak measurements and apply at the drive power
connector.
Maximum allowed noise values given below are peak-to-peak measurements and apply at the drive power
connector.
7.2.2
Power sequencing
The drive does not require power sequencing. The drive protects against inadvertent writing during power-up
and down.
and down.
7.2.3
Current profiles
The +12V and +5V current profiles are shown in the following figures.
Note: All times and currents are typical. See Section 7.2 for maximum current requirements.
Figure 1. Typical ST3600057FC current profiles
+5 V =
250 mV pp from 0 to 20 MHz.
+12 V =
800 mV pp from 100 Hz to 8 KHz.
450 mV pp from 8 KHz to 20 KHz.
250 mV pp from 20 KHz to 5 MHz.