Seagate ST9500621SS Constellation.2 SATA Product Manual - Page 20
Conducted noise, Note., Voltage tolerance
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Figure 3. Typical 5V/12V startup and operation current profile for 250GB models 3.8.2 Conducted noise Noise is specified as a periodic and random distribution of frequencies covering a defined frequency. Maximum allowed noise values given below are peak-to-peak measurements and apply at the drive power connector. • +5v = 250 mV pp from 100 Hz to 20 MHz. • +12v = 450 mV pp from 100 Hz to 100 KHz. = 250 mV pp from 100 KHz to 20 MHz = 150 mV pp from 20 MHz to 80 MHz 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 ± 5% 14 Constellation.2 Serial ATA Product Manual, Rev. F
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14
Constellation.2 Serial ATA Product Manual, Rev. F
Figure 3. Typical 5V/12V startup and operation current profile for 250GB models
3.8.2
Conducted noise
Noise is specified as a periodic and random distribution of frequencies covering a defined frequency. Maximum
allowed noise values given below are peak-to-peak measurements and apply at the drive power connector.
•
+5v
=
250 mV pp from 100 Hz to 20 MHz.
•
+12v
=
450 mV pp from 100 Hz to 100 KHz.
=
250 mV pp from 100 KHz to 20 MHz
=
150 mV pp from
20 MHz to 80 MHz
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
±
5%