Conducted Noise Immunity; Power Sequencing; Current Profiles; Figure 2. St9146802Ss Current Profile - Seagate ST300MM0026 Product Manual
Savvio 10k.2 sas
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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.
+5v
=
250 mV pp from 0 to 100 kHz to 20 MHz.
+12v
=
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.
7.2.2
Power sequencing
The drive does not require power sequencing. The drive protects against inadvertent writing during power-up
and down.
7.2.3
Current profiles
The +12V and +5V current profiles for the ST9146802SS and ST973402SS models are shown below.
Figure 2.
ST9146802SS current profile
Savvio 10K.2 SAS Product Manual, Rev. E
23
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