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| 型號： | 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)： | 1/31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
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Current-Bias/Current-Sense Architecture
Fabricated Using LinIMPACT-C
BiCMOS
Technology
Operates From a Single 5-V Supply (
±
10%)
Low-Power Idle Mode
Single-Ended Input to Reader With One
Side Grounded
True Differential Read Output
Wide Magnetoresistive (MR) Resistor
[R
(MR)
] Range From 10
to 40
MR-Head Bias Current [I
I(BIAS)
]
Programmable From 7 mA to 17 mA
Buffered-Head-Voltage [V
(BH)
] Monitor
Gain: 230 V/V at R
(MR)
= 20
Bandwidth:
– 65 MHz at –1 dB [R
(MR)
= 20
]
– 140 MHz at –3 dB [R
(MR)
= 20
]
Equivalent Input Noise = 0.55 nV/
√
Hz at
R
(MR)
= 20
Write-Head Current Programmable
From 10 mA to 35 mA (Base to Peak)
Write-Current Rise/Fall Time = 3.7 ns
– L
I(TF)
(Head Only) = 180 nH
– R
I(TF)
= 15
, L
(lead)
= 50 nH
– I
I(W)
= 25 mA
Fast Recovery Times:
– Write to Read = 0.8
μ
s (BHV/IBON = L)
– Read to Write = 50 ns
Output Capacitance = 8.5 pF for Write
Multichannel Servo Write to All Channels
Read-Fault (RUS), Write-Fault (WUS), and
Idle-Fault (IUS) Detection
MR-Head Open Protection and MR-Head
Short Detection Available (Metal Option,
Disabled)
Thermal-Asperity Detection Available
(Metal Option, Disabled)
Pseudo-ECL (PECL) Differential-Write-Data
(WDX and WDY) Inputs
Write Data Divided-by-2 (FF) Circuit
Available (Metal Option, Disabled)
Channel Separation 70 dBa at f = 25 MHz
Power-Supply Rejection Ratio (PSRR)
50 dB at 25 MHz (Input Referred)
MR Bias On During Write Mode; Otherwise,
Programmable On/Off
Input Control Lines:
– Head Select HS0–HS2 (8 Channel) or
HS0 – HS3 (10 Channel) With Internal
Pullup Resistors
– R/W With Internal Pullup Resistor
– CS With Internal Pullup Resistor
– BHV/IBON With Internal Pulldown
Resistor
Packaged in 44-/48-Pin (8 Channel) TSSOP
and 50-/56-Pin (10 Channel) TSSOP
Packages
Optimized for Package-On-Arm
Applications
PART NUMBER
DESCRIPTION
PACKAGE TYPE
TLS24308
8-channel magnetoresistive/thin-film read/write preamplifier
Plastic 44 pin (DBT)
TLS24318
8-channel magnetoresistive/thin-film read/write preamplifier
Plastic 48 pin (DGG)
TLS24310
10-channel magnetoresistive/thin-film read/write preamplifier
Plastic 50 pin (DBT)
TLS24320
10-channel magnetoresistive/thin-film read/write preamplifier
Plastic 56 pin (DGG)
description
The TLS24308, TLS24310, TLS24318, and TLS24320 are read/write BiCMOS preamplifiers designed for use
with magnetoresistive (MR)/thin-film (TF) recording heads. The MR element is used for reading and the
inductive thin-film section of the head is used for writing. The preamplifiers implement a current-bias/current-
sense architecture. All have a single-ended read input with a fully differential read (RDX, RDY) output that
operates from a single 5-V supply.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright
1996, Texas Instruments Incorporated
LinIMPACT-C is a trademark of Texas Instruments Incorporated.
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