Conductive Noise; Magnetic Fields; Dc Power Requirements; Table 16: Dc Power Requirements - Hitachi HTS541010G9AT00 - Travelstar 100 GB Hard Drive Specifications

6.3 Conductive noise

The disk drive will work without soft error degradation in the frequency range from DC to 20 Mhz injected through
any two of the mounting screw holes of the drive when an AC current of up to 45 mA (p-p) is applied through a 50-
ohm resistor connected to any two mounting screw holes.

6.4 Magnetic fields

The disk drive will withstand radiation and conductive noise within the limits shown below. The test method is
defined in the Noise Susceptibility Test Method specification, P/N 95F3944.

6.5 DC power requirements

Connection to the product should be made in a safety extra low voltage (SELV) circuits. The voltage specifications
are applied at the power connector of the drive.
Item
Nominal supply
Supply voltage
Power supply ripple (0-20
1
MHz)
2
Tolerance
Supply rise time

Table 16: DC Power requirements

Watts (RMS Typical)
Performance Idle average
Active Idle average
Low Power Idle average
4
Read average
Write average
5
Seek average
Standby
Sleep
Startup (maximum peak)
Average from power on to
ready
Footnotes:
1
The maximum fixed disk ripple is measured at the 5 volt input of the drive.
2
The disk drive shall not incur damage for an over voltage condition of +25% (maximum duration of
20 ms) on the 5 volt nominal supply.
3
The idle current is specified at an inner track.
4
The read/write current is specified based on three operations of 63 sector read/write per 100 ms.
5
The seek average current is specified based on three operations per 100 ms.
6
The worst case operating current includes motor surge.
Requirements
+5 Volt dc
-0.3 Volt to 6.0 Volt
100 mV p-p max.
±5%
1-100ms
3 2.0
1.20
0.85
2.0
2.0
2.5
0.4
0.2
6 5.0
3.8
Travelstar 5K100 (Serial ATA) Hard Disk Drive Specification
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