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| 型號： | TLS24306 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Magnetoresistive/Thin-Film Read/Write Preamplifiers(6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（6通道磁阻/薄膜讀/寫用前置放大器） |
| 文件頁數(shù)： | 1/23頁 |
| 文件大小： | 489K |
| 代理商： | TLS24306 |
TLS24302, TLS24306
2- AND 6-CHANNEL MAGNETORESISTIVE/THIN-FILM
READ/WRITE PREAMPLIFIERS
SQHS007A – DECEMBER 8, 1995 – REVISED DECEMBER 15, 1995
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:
– Upper or Lower Half Channels
– Every Two Channels
– 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 HS (2 Channel) or
HS0 – HS2 (6 Channel) With Internal
Pullup Resistors
– R/W With Internal Pullup Resistor
– CS With Internal Pullup Resistor
– BHV/IBON With Internal Pulldown
Resistor
Packaged in 30-Pin (2 Channel) and 38-Pin
(6 Channel) Plastic TSSOP Packages
Optimized for Package-On-Arm
Applications
PART NUMBER
DESCRIPTION
PACKAGE TYPE
TLS24302
2-channel magnetoresistive/thin-film read/write preamplifier
Plastic 30 pin (DBT)
TLS24306
6-channel magnetoresistive/thin-film read/write preamplifier
Plastic 38 pin (DBT)
description
The TLS24302 and TLS24306 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. Both 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
1995, Texas Instruments Incorporated
LinIMPACT-C is a trademark of Texas Instruments Incorporated.
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