TDA5155 Datasheet, PDF (5/24 Pages) NXP Semiconductors – Pre-amplifier for Hard Disk Drive HDD with MR-read/inductive write heads

Philips Semiconductors
Pre-amplifier for Hard Disk Drive (HDD)
with MR-read/inductive write heads
6 BLOCK DIAGRAM
Preliminary specification
TDA5155
handbook, full pagewidth
6
WDlx(i)
7
WDly(i)
4
WDlx(v)
5
WDly(v)
VCC
16
WRITE DRIVER
INPUT
TDA5155
FF
3
HUS
HEAD UNSAFE
INDICATOR
17
Rext
LOW SUPPLY
VOLTAGE
INDICATOR
8
R/W
11
SCLK
9
SEN
10
SDATA
+VCC
SERIAL
INTERFACE
20 kΩ
13
RDx
14
RDy
10
WRITE
CURRENT
SOURCE
VOLTAGE
REFERENCE
TAS
DETECTOR
4
5
3
head select 10
RMR
5
CURRENT
SOURCE
4
4
2, 12, 15, 18
GNDn
VCC(WD)
(5 to 8 V)
1
20, 25, 30, 35,
40, 45, 50, 55,
10
60, 65
10
19, 24,
29, 34, 39, 44,
49, 54, 59, 64
nWy
nWx
WRITE DRIVER
AND
READ PREAMP
(10×)
23, 28, 33, 38,
43, 48, 53, 58,
10
63, 68
22, 27, 32, 37,
42, 47, 52, 57,
10
62, 67
21, 26, 31, 36,
41, 46, 51, 56,
10
61, 66
nRy
nGND
nRx
MGG982
Fig.1 Block diagram.
1997 Apr 08
5