Seagate ST92011A, ST94811A, ST94011A Typical current profile, Conducted noise, Voltage tolerance

2.9.1.1Typical current profile

+5 Volt Current during spindle start — Typical Amperes

	1.2
	1.0
	0.8
Amps	0.6
	0.4
	0.2
	0.0
	0.0	0.5	1.0	1.5	2.0	2.5	3.0	3.5	4.0	4.5
						Seconds

Figure 2. Typical 5V startup and operation current profile

2.9.2Conducted 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.

2.9.3Voltage tolerance

Voltage tolerance (including noise):

5V ± 5%

Momentus 5400.1 Product Manual, Rev. F 9