Conducted Noise; Voltage Tolerance; Figure 2. Typical 5V Startup And Operation Current Profile - Seagate ST9120824A - Momentus 4200.2 120 GB Hard Drive Product Manual

2.9.1.1 Typical current profile

Figure 2. Typical 5V startup and operation current profile

2.9.2

Conducted noise

Input noise ripple is measured at the host system power supply across an equivalent 15-ohm resistive load on
the +5 volt line.
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.
2.9.3

Voltage tolerance

Voltage tolerance (including noise):
5V ± 5%
Momentus 4200.2 Product Manual, Rev. A 9