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Constellation CS Serial ATA Product Manual, Rev. C 12
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2.8.2 Conducted 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 10MHz.
• 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 10MHz.
2.8.3 Voltage tolerance
Voltage tolerance (including noise):
• 5V ± 5%
• 12V ± 10%
Note
Equivalent resistance is calculated by dividing the nominal voltage by the typical RMS read/write current.