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PDF CXA3090N Data sheet ( Hoja de datos )
| Número de pieza | CXA3090N | |
| Descripción | 6ch. Read/Write Amplifier for Thin Film Head of Hard Disk Drive | |
| Fabricantes | Sony Corporation | |
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CXA3090N
6ch. Read/Write Amplifier for Thin Film Head of Hard Disk Drive
For the availability of this product, please contact the sales office.
Description
The CXA3090N is a Read/Write Amplifier for the
thin film head of hard disk drive and designed to
handle up to 6 channel heads.
24 pin SSOP (Plastic)
Features
• Operate on single +5 V power supply
• Low power consumption
Read : 85 mW
Write : 115 mW + IW ×5
• Designed for two terminal thin-film or MIG heads
• Read amplifier emitter follower output featuring
325 times gain (typ).
• Differential input capacitance for Read : 6pF (typ)
• Input noise : 0.47 nV / √ Hz (typ)
• Write current range : 5 to 15 mA
• Differential Head voltage swing : 6.8 Vp-p (typ)
• Differential P-ECL write data input
• Built-in write unsafe detection circuit.
• Built-in Servo write function (3/6 ch).
• Built-in IC protection circuit for short of head and
GND.
• Read data outputs are high impedance in write
mode.
• Unselected head voltage is GND potential.
• Built-in supply voltage monitor circuit prohibits
incorrect write during power on or abnormal
voltage.
• Self switching damping resistance (RD = 350 Ω).
Absolute Maximum Ratings (Ta=25 °C)
• Supply voltage
VCC 6 V
• Write current
IW 20 mAo-p
• Operating temperature Topr –20 to +75 °C
• Storage temperature Tstg –55 to +150 °C
• Allowable power dissipation
PD 800 mW
• WUS/SE pin input current
ISEH 15 mA
Recommended Operating Conditions
• Supply voltage
VCC 5.0 V±10 %
• Write current
IW 5 to 15 mAo-p
Function
Read, Write and Write unsafe detection for HDD,
power supply ON/OFF detection.
Structure
Bipolar silicon monolithic IC
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.
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E96420-TE
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CXA3090N
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CXA3090N
Description Functions
Read amplifier
This is a low noise amplifier for amplifying the signals from the heads with an emitter follower output.
The RDX and RDY are the outputs of the differential amplifier whose polarity between the RDX and X side of
the head input is same.
Write circuit
The Write data input to WDX pin and WDY pin passes through the buffer amp. It drives the Write switch
circuit which supplies the Write current to the heads.
The Write current flows into the X side when WDX is “Low” and WDY is “High”.
Mode control
The mode are set as shown Table 1 by R/W and WUS/SE.
R/W WUS/SE HS0 HS1 HS2
LX
See Table 2
HX
L ∗∗ See Table 3 X
Table 1. Mode selection
Mode
Write
Read
Servo Write
Head selection
The heads are selected as shown in Table 2 by the HS0, HS1 and HS2 pins.
HS0 HS1 HS2 Head
LLL0
HL L 1
LHL 2
HHL 3
L LH4
HLH5
Table 2. Head selection
Servo write mode ∗∗
This mode allows for writing to multiple channels at once.
To enable servo write mode follow these steps:
(1) Place the device in the Read mode.
(2) Set HS0 and HS1 following Table 3.
(3) Set WUS/SE to VSEH, or input ISEH to WUS/SE.
(4) While maintaing step (2) and (3) above make R/W low, placing the device in servo write mode.
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11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet CXA3090N.PDF ] | |
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