Seagate 3240, 2531 manual Typical current profile, Conducted noise, Voltage tolerance

Medalist 3240 and Medalist 2531 Product Manual, Rev. A 9

1.7.1.1Typical current profile

Current (mA)

1,400

1,200

1,000

800

600

400

200

0 2 4 6 8 10 12 14 16 18

Time (seconds)

Figure 1. Typical startup and operation current profile

Figure 1 shows a typical current profile for the Medalist 3240 and the Medalist 2531.

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 triangular-wave injected noise at up to 25 MHz.

∙Using 5-volt power the drive is expected to operate with a maximum of 100 mV peak-to-peak triangular-wave injected noise at up to 25 MHz.

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

1.7.3Voltage tolerance

Voltage tolerance (including noise): ± 5%