Seagate ST800FM0022 Pulsar.2 SAS Product Manual - Page 30

Conducted noise immunity, Power sequencing, Current profiles

Page 30 highlights

6.3.1 Conducted noise immunity 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. 6.3.2 Power sequencing The drive does not require power sequencing. The drive protects against inadvertent writing during power-up and down. 6.3.3 Current profiles The +12V and +5V current profiles for the Pulsar.2 drives are shown below. Figure 1. Current profiles for 800GB models PULSAR.2 SAS PRODUCT MANUAL, REV. C 24

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P
ULSAR
.2 SAS P
RODUCT
M
ANUAL
, R
EV
. C
24
6.3.1
Conducted noise immunity
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.
6.3.2
Power sequencing
The drive does not require power sequencing. The drive protects against inadvertent writing during power-up and down.
6.3.3
Current profiles
The +12V and +5V current profiles for the Pulsar.2 drives are shown below.
Figure 1.
Current profiles for 800GB models
+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.