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DP84600R Datasheet

  • DP84600R

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DP84600R DP84605R Thin-Film MIG Head Read Write Preamplifier
PRELIMINARY
April 1994
DP84600R DP84605R
Thin-Film MIG Head Read Write Preamplifier
General Description
The DP84600R DP84605R are 5V high performance four
channel low power read preamplifiers write current drivers
designed for two-terminal recording head applications An
idle mode is available which conserves power to a level of
0 5 mW (typically) when activated Power supply fault pro-
tection is included to disable the write current generator
whenever the supply voltage is below 4V Both parts incor-
porate 300X write damping
The DP84600R has a read gain of 300 versus 200 for the
DP84605R
Upon request other options such as other read gains PECL
inputs no damping and different packaging are available
Features
Y
Y
Y
Y
Y
Y
Y
Y
Y
Low input capacitance 12 pF typical
Low input noise 0 49 nV
0
Hz typical
Low power 100 mW typical in read mode
Very low idle power 0 5 mW typical
Programmable write current source (1 mA 鈥?40 mA)
Low power supply protection in write mode
Head short to ground protection
Plug compatible to VTC VM7204 7104 7114
Single 5V power supply
Block Diagram
TL F 11990 鈥?1
FIGURE 1 Circuit Block Diagram
This Preliminary document contains information on a product under development Specifications contained within are based
on design targets or a limited amount of data and are subject to change without notice National Semiconductor reserves the
right to change or discontinue this product without notice
C
1995 National Semiconductor Corporation
TL F 11990
RRD-B30M105 Printed in U S A

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