Conducted Noise; Voltage Tolerance; Figure 3. Typical 5V/12V Startup And Operation Current Profile For 250Gb Models - Seagate Enterprise Capacity 2.5 HDD Constellation Product Manual

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
• +12v
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
= 250 mV pp from 100 Hz to 20 MHz.
= 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
Constellation.2 Serial ATA Product Manual, Rev. F