Seagate ST31500541AS Barracuda LP Series SATA Product Manual - Page 20

2.7.1.1 Typical current profiles Note. Typical 12V startup and operation current profile (2 disk typical) 2.7.2 Conducted noise Input noise ripple is measured at the host system power supply across an equivalent 80-ohm resistive load on the +12V line or an equivalent 15-ohm resistive load on the +5V 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. 2.7.3 Voltage tolerance Voltage tolerance (including noise): 5V +10% / -7.5% 12V +10% / -7.5% 12 Barracuda LP Series SATA Product Manual, Rev. D