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,
I
W
=50mA, L
H
=75nH, R
H
= 10Ω, f
DATA
=5MHz, Ambient temperature.
SYMBOL PARAMETERS CONDITIONS MIN TYP MAX UNIT
I
WR
Write Current Range 10 30.8 50.3 mA
PK
∆I
WR
/ I
WR
Write Current Tolerance -7 7 %
Differential Head Voltage
Swing
Iwr = 50mA TBD 16 V
PP
I
UH
Unselected Head Current
Glitch
I
W
= 50mA 1 mA
PK
f
DATA
Write Data Frequency for
Safe Condition
FLT = Low 1 MHz
R
O
Differential Output
Resistance
30 60 Ohm
C
O
Differential Output
Capacitance
6 pF
A
SYM
Asymmetry
(A
SYM
= |tr-tf| )
Write Data has 50% duty cycle &
0.5ns rise/fall time, load=short
0.1 ns
t
r
, t
f
Rise/Fall Time
(-0.8 * I
WR
=> +0.8 * I
WR
)
10-90%; I
W
= 50mA
L
H
=75nH, R
H
=10Ω
0.84 ns
T
WSET
Write Current Settling Time I
WR
= 50mA,
L
H
=75nH, R
H
=10Ω
2.5 ns
W
COV
Write Current Overshoot I
W
= 50mA,
L
H
= 75 nH, R
H
= 10Ω
WCP0,1,2 = 000
20 %
