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CXA1940N Datasheet

  • CXA1940N

  • 4ch. Read/Write Amplifier for Thin Film Head of Hard Disk Dr...

  • 16頁

  • SONY   SONY

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CXA1940N
4ch. Read/Write Amplifier for Thin Film Head of Hard Disk Drive
For the availability of this product, please contact the sales office.
Description
The CXA1940N is a Read/Write Amplifier for the
thin film head of hard disk drives and designed to
handle up to 4-channel heads.
Features
鈥?/div>
Operate on single +5V power supply.
鈥?/div>
Low power consumption.
Read : 95mW
Write (I
W
=20mA) : 130mW+I
W
脳
5
Power save : 5.5mW
鈥?/div>
Write current can be varied through an external
resistor. Built-in stabilizing circuit provides stable
current during voltage and temperature drift.
鈥?/div>
Drives up to 4 heads.
鈥?/div>
Designed for two-terminal thin-film or MIG heads.
鈥?/div>
Built-in power save function.
鈥?/div>
Read amplifier emitter follower output featuring
290 times gain (Typ.).
鈥?/div>
Built-in Write unsafe detection circuit.
鈥?/div>
Built-in supply voltage monitor circuit prohibits
incorrect Write during power on or abnormal
voltage.
鈥?/div>
Built-in IC protection circuit for short of head and
GND.
鈥?/div>
Differential input capacitance for Read : 14pF
(Typ.).
鈥?/div>
Write data input minimum pulse width : 10ns
鈥?/div>
Read data output become high impedance in write
mode to improve read data offset when switching
from write to read mode.
鈥?/div>
Unselected head DC voltage is GND potential.
鈥?/div>
Self switching damping resistance (RD=310鈩?
H0Y
20 pin SSOP (Plastic)
Block Diagram and Pin Configuration
GND
1
DRIVER
MODE
CONTROL
20 PS
H0X
2
19 R/W
3
AMP
WRITE
CURRENT
SOURCE
18 WC
DRIVER
H1X
4
AMP
17 RDY
H1Y
5
AMP
16 RDX
DRIVER
H2X
6
HEAD
SELECT
15 HS0
H2Y
7
AMP
14 HS1
DRIVER
H3X
8
POWER
ON/OFF
DETECTOR
13 V
CC
H3Y
9
AMP
T-FF
12 WDI
NC
10
IC
PROTECTOR
WRITE
UNSAFE
DETECTOR
11 WUS
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
鈥?鈥?/div>
E93X03-TE

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