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參數(shù)資料
| 型號(hào)： | TLS24320 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Magnetoresistive/Thin-Film Read/Write Preamplifiers(10通道磁阻/薄膜讀/寫用前置放大器) |
| 中文描述： | 磁阻/薄膜讀/寫前置放大器（10通道磁阻/薄膜讀/寫用前置放大器） |
| 文件頁數(shù)： | 20/31頁 |
| 文件大?。?/td> | 676K |
| 代理商： | TLS24320 |
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TLS24308, TLS24310, TLS24318, TLS24320
8- AND 10-CHANNEL MAGNETORESISTIVE/THIN-FILM
READ/WRITE PREAMPLIFIERS
SQHS009 – JANUARY 1996
20
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
write mode (continued)
Actual head current (I
head
) is determined by the following formula:
I
I(W)
I
head
1
Rhead
Rdamp
Where:
I
I(W)
is the write current in mA.
R
damp
is the damping resistance in
.
R
head
is the head resistance in
.
During read mode, TI recommends that WDX or WDY have a potential
a differential voltage
100 mV. The differential voltage can be set to zero during the idle mode.
2.5 V and that WDX and WDY have
write mode with MR-head bias current on
Taking CS, R/W, and BHV/IBON low activates the write mode with MR-head bias current on. In this mode, the
bias current on the MR head selected by HS0–HS3 (HS0–HS2 for TLS24308 and TLS24318) is instrumental
in performing fast recovery-to-read mode.
servo write mode
Taking CS and R/W low and FLT/SE to
data is written to all heads regardless of the HS0–HSn selection. TI recommends that a pullup resistor of 4.7 k
be connected to FLT/SE to ensure that the maximum allowable FLT/SE voltage is not exceeded during the servo
mode when the applied voltage is 12 V.
V
CC
+1.2 V activates the servo write mode. In this mode, the same
During servo write for all channels, V
CC
and/or write current must be set lower than normal writing mode to
prevent exceeding the power dissipation limit of the package. Continuous operations in the servo write mode
must be limited to 1 hour. Recommended operating room temperature is 25
°
C.
(10)
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