Travelstar 4K120 Hard Disk Drive Specification
27
6.1.1.1 Corrosion test
The drive must be functional and show no signs of corrosion after being exposed to a temperature humidity stress
of 50°C/90% RH (relative humidity) for one week followed by a temperature and humidity drop to 25°C/40%RH
in 2 hours.
6.1.2 Radiation noise
The drive shall work without degradation of the soft error rate under the following magnetic flux density limits at
the enclosure surface.
6.1.3 Conductive noise
The disk drive shall 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.
6.2 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.
Table 18: Magnetic flux density limits
Frequency (KHz)
Limits (uT RMS)
0–60
500
61–100
250
101–200
100
201–400
50
Table 19: DC power requirements
Item
Requirements
Nominal supply
+5Volt DC
Supply voltage
–0.3 Volt to 6.0 Volt
Power supply ripple (0–20 MHz)
1
100mV p-p max.
Tolerance
2
±5%
Supply rise time
1 - 100 ms
Watts (RMS typical)
All models
Performance Idle average
3
1.25
Active Idle average
0.65
Low Power Idle average
0.45
Read average
4
1.4
Write average
1.4
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