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CONSTELLATION ES SERIAL ATA PRODUCT MANUAL, REV. F 13
500GB model current profile
Figure 3. Typical 500GB model 5V & 12V startup and operation current profiles
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 V line or an
equivalent 15-ohm resistive load on the +5V line.
• Using 12V power, the drive is expected to operate with a maximum of 120mV peak-to-peak square-wave injected noise at up to 10MHz.
• Using 5V power, the drive is expected to operate with a maximum of 100mV peak-to-peak square-wave injected noise at up to 10MHz.
Note. Equivalent resistance is calculated by dividing the nominal voltage by the typical RMS read/write current.
2.8.3 Voltage tolerance
Voltage tolerance (including noise):
5V ± 5%
12V ±10%