1998 July 30
Philips Semiconductors Objective Specification, Revision 2.2
Pre-Amplifier for Hard Disk Drive with
MR-Read / Inductive Write Heads TDA5360
29
12.3 Write Charateristics
Unless otherwise specified, recommended operating conditions apply,
IW=50mA, LH=75nH, RH = 10, fDATA=5MHz, Ambient temperature.
SYMBOL PARAMETERS CONDITIONS MIN TYP MAX UNIT
IWR Write Current Range 10 30.8 50.3 mAPK
IWR / IWR Write Current Tolerance -7 7%
Differential Head Voltage
Swing Iwr = 50mA TBD 16 VPP
IUH Unselected Head Current
Glitch IW = 50mA 1mAPK
fDATA Write Data Frequency for
Safe Condition FLT = Low 1MHz
RODifferential Output
Resistance 30 60 Ohm
CODifferential Output
Capacitance 6pF
ASYM Asymmetry
(ASYM = |tr-tf| ) Write Data has 50% duty cycle &
0.5ns rise/fall time, load=short 0.1 ns
tr , tfRise/Fall Time
(-0.8 * IWR => +0.8 * IWR)10-90%; IW = 50mA
LH=75nH, RH=10
0.84 ns
TWSET Write Current Settling Time IWR = 50mA,
LH=75nH, RH=10
2.5 ns
WCOV Write Current Overshoot IW = 50mA,
LH = 75 nH, RH = 10
WCP0,1,2 = 000
20 %