Conducted Noise Immunity; Power Sequencing; Current Profiles - Seagate CHEETAH NS 10K.2 FC ST3600002FC Product Manual

6.2.1

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.
+5 V = 250 mV pp from 0 to 100 kHz 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.
6.2.2

Power sequencing

The drive does not require power sequencing. The drive protects against inadvertent writing during power-up
and down.
6.2.3

Current profiles

The +12V and +5V current profiles for the ST3600002FC, ST3450802FC and ST3300602FC models are
shown below.
Note: All times and currents are typical. See Tables 2 and 3 for maximum current requirements.
Figure 1. Typical ST3600002FC drive, 4 Gbit, +5V and +12V current profiles
26 Cheetah NS 10K.2 FC Product Manual, Rev. B