3 write charateristics – Philips TDA5360 User Manual
Page 29
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
= 10
Ω
, f
DATA
=5MHz, Ambient temperature.
SYMBOL
PARAMETERS
CONDITIONS
MIN
TYP
MAX
UNIT
IWR
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
IUH
Unselected Head Current
Glitch
I
W
= 50mA
1
mA
PK
fDATA
Write Data Frequency for
Safe Condition
FLT = Low
1
MHz
RO
Differential Output
Resistance
30
60
Ohm
CO
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
=10
Ω
0.84
ns
T
WSET
Write Current Settling Time
I
WR
= 50mA,
L
H
=75nH, R
H
=10
Ω
2.5
ns
W
COV
Write Current Overshoot
I
W
= 50mA,
L
H
= 75 nH, R
H
= 10
Ω
WCP0,1,2 = 000
20
%