Seagate ST157N - Input Noise Ripple and Frequency

+12 voe
Voltage Tolerance (inc. ripple):
Max. Current at Power-Up:
Max. RMS Current at Power-Up (t;;10 sec.):
±5%
2.0Amps
1.5Amps
Seeking Current:
Peak Max.
RMS Max.
RMSTyp.
Nonseeklng Current:
RMS Max.
RMSTyp.
+SVDC
Voltage Tolerance (inc. ripple):
Seeking Current:
Peak Max.
RMS Max.
RMSTyp.
Nonseeking Current:
RMS Max.
RMSTyp.
POWER
PowerTyp.
1.4Amps
0.9Amps
0.6Amps
0.5Amps
0.35Amps
Without Term.
With Term.
±5% ±5%
1.4Amps
1.6Amps
1.2Amps 1.4Amps
1.0Amps 1.2Amps
1.1 Amps 1.3Amps
0.9Amps 1.1 Amps
9Watts 10 Watts
1.9.1 Input Noise Ripple and Frequency
The maximum permitted noise ripple is 100 mV (peak-to-peak) on either
+5 or + 12
voe measured on the host system power supply across the
following equivalent resistive loads:
+12VOC:
+5VOC:
16 '1
5 '1
The maximum permitted noise frequency is 20 MHz on both the+ 12 VOC
and +5 voe lines.
ST125N/138N/157N Product Manual, Rev. C 7