Seagate ST380215SCE manual Representative current profile, Conducted noise, Voltage tolerance

2.1.7.1.1Representative current profile

Figure 1 Representative 5V startup and operation current profile

Figure 2 Representative 12V startup and operation current profile

2.1.7.2Conducted noise

Input noise ripple is measured at the host system power supply across an equivalent 80-ohm resistive load on the +12 volt line or an equivalent 15-ohm resistive load on the +5 volt line.

•Using 12-volt power, the drive is expected to operate with a maximum of 120 mV peak-to-peak square-wave injected noise at up to 10 MHz.

•Using 5-volt power, the drive is expected to operate with a maximum of 100 mV peak-to-peak square-wave injected noise at up to 10 MHz.

Note. Equivalent resistance is calculated by dividing the nominal voltage by the typical RMS read/write current.

2.1.7.3Voltage tolerance

Voltage tolerance (including noise):

5V ± 5%

12V ± 10%