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參數(shù)資料
| 型號： | TDA5155 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Pre-amplifier for Hard Disk Drive HDD with MR-read/inductive write heads |
| 中文描述： | 預(yù)硬盤驅(qū)動器硬盤驅(qū)動器放大器MR-read/inductive寫磁頭 |
| 文件頁數(shù)： | 17/24頁 |
| 文件大小： | 112K |
| 代理商： | TDA5155 |
1997 Apr 08
17
Philips Semiconductors
Preliminary specification
Pre-amplifier for Hard Disk Drive (HDD)
with MR-read/inductive write heads
TDA5155
Notes to the recommended operating conditions
1.
A supply by-pass capacitor from V
CC
to ground or a
low pass filter may be used to optimize the PSRR.
2.
The supply voltage V
CC(WD)
must never be below V
CC
in normal mode, and two diode 1.4 V above V
CC
in
servo mode.
3.
The given values should be interpreted in the way that
the single ended voltage could swing from
0.2 to 0.75 V, and that the common mode voltage
should be such that for any of the two states, the
V
IH(PECL)
is less than V
CC
and V
IL(PECL)
is more than
1.5 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------------------------------------------------------------------------
200
WDIy v
–
1.4
–
4.
Same comments for the given values as for the
voltage input mode. The HIGH (respectively LOW)
level input current is defined such that it produces the
same effect at the output of the writer (Wx, Wy) as the
HIGH (resp. LOW) level input voltage.
5.
The mismatch refers to the resistance of the two
stripes of the same head. This is defined as follows:
(R
MR
) = abs(R
MR1
R
MR2
).
These parameters depend on the head model.
The data given in the table are those used for testing.
The combination of maximum head resistance, lead
resistance and bias current is not permitted. To avoid
voltage breakthrough between heads and disk, the
voltage over the MR elements is limited by two diode
voltages.
6.
7.
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