tda5153x NXP Semiconductors, tda5153x Datasheet - Page 18

• Manufacturer Part Number: tda5153x
• Description: Pre-amplifier Hard Disk Drive With Mr-read/inductive Write Heads
• Manufacturer: NXP Semiconductors

Philips Semiconductors
12 RECOMMENDED OPERATION CONDITIONS
Notes
1. A supply by-pass capacitor from V
2. The supply voltage V
3. The given values should be interpreted in such a way that the single-ended voltage could swing 0.2 to 0.75 V and
4. The mismatch refers to the resistance of the two stripes of the same head. This is defined as follows:
5. These parameters depend on the head model. The values given are those used for testing.
6. The combination of maximum head resistance, lead resistance and bias current is not permitted. To avoid voltage
1997 Jul 02
V
V
V
V
V
V
V
T
T
R
L
R
V
V
L
R
C
R
SYMBOL
l(tot)
wh
amb
j
R
CC
CC(WD)
IH
IL
i(dif)(p-p)
IH(PECL)
IL(PECL)
MR
sig(dif)(p-p)
Pre-amplifier for Hard Disk Drive (HDD)
with MR-read/inductive write heads
MR
l(tot)
wh
wh
ext
MR
mode.
that the common mode voltage should be such that for any of the two states, V
PECL voltage swing: a wider peak-to-peak voltage swing can be used. In that case a current will flow through the
WDI inputs. This current is approximately equal to
break-through between heads and disk, the voltage over the MR elements is limited by two diodes.
R
MR
= R
supply voltage range
write driver supply voltage
HIGH level input voltage (CMOS)
LOW level input voltage (CMOS)
differential input voltage
(peak-to-peak value)
HIGH level PECL input voltage
LOW level PECL input voltage
ambient temperature
junction temperature
MR element resistance
R
total lead inductance to the head
total lead resistance to the head
voltage on top of MR elements
differential MR head input signal
(peak-to-peak value)
write head inductance
write head resistance
write head capacitance
external reference resistor
MR
MR1
mismatch
R
MR2
PARAMETER
CC(WD)
must never be below V
CC
to ground or a low-pass filter may be used to optimize the PSRR.
note 1
note 2
note 3
note 3
note 3
reading
writing (V
note 4
in each lead; note 5
in each lead; note 5
note 6
including lead; note 5
including lead; note 5
including lead; note 5
I
ref
=
---------------------------------------------------------- -
CONDITIONS
CC
WDIx WDIy
---------- -
R
V
18
in normal mode, and two diode voltages above V
ref
ext
CC(WD)
–
200
= 8 V)
–
1.4
4.5
V
3.5
0
0.4
1.5
0
15
0.4
CC
MIN.
IH(max)
0.7
2.85
2.15
28
35
1.5
1
0.15
10
5
10
TYP
< V
CC
Preliminary specification
and V
5.5
8.8
V
0.8
1.5
V
70
110
130
34
4
0.5
2
CC
CC
MAX.
IL(min)
TDA5153
CC
> 1.5 V.
V
V
V
V
V
V
V
nH
V
mV
pF
k
C
C
C
H
in servo
UNIT