Seagate ST33000651SS Constellation ES SATA Product Manual - Page 19

Conducted noise, Note., Voltage tolerance

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Figure 1. Typical 5V startup and operation current profile Figure 2. Typical 12V startup and operation current profile 3.8.2 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. 3.8.3 Voltage tolerance Voltage tolerance (including noise): 5V ± 5% 12V ±10% Constellation ES Serial ATA Product Manual, Rev. G 13

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Constellation ES Serial ATA Product Manual, Rev. G
13
Figure 1. Typical 5V startup and operation current profile
Figure 2. Typical 12V startup and operation current profile
3.8.2
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.
3.8.3
Voltage tolerance
Voltage tolerance (including noise):
5V
± 5%
12V ±10%