cxa3090n Sony Electronics, cxa3090n Datasheet

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cxa3090n

Manufacturer Part Number
cxa3090n
Description
6ch. Read/write Amplifier For Thin Film Head Of Hard Disk Drive
Manufacturer
Sony Electronics
Datasheet
For the availability of this product, please contact the sales office.
Description
thin film head of hard disk drive and designed to
handle up to 6 channel heads.
Features
• Operate on single +5 V power supply
• Low power consumption
• Designed for two terminal thin-film or MIG heads
• Read amplifier emitter follower output featuring
• Differential input capacitance for Read : 6pF (typ)
• Input noise : 0.47 nV /
• 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
• Read data outputs are high impedance in write
• Unselected head voltage is GND potential.
• Built-in supply voltage monitor circuit prohibits
• Self switching damping resistance (R
Function
Structure
The CXA3090N is a Read/Write Amplifier for the
325 times gain (typ).
GND.
mode.
incorrect write during power on or abnormal
voltage.
Read, Write and Write unsafe detection for HDD,
power supply ON/OFF detection.
Bipolar silicon monolithic IC
6ch. Read/Write Amplifier for Thin Film Head of Hard Disk Drive
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.
Read : 85 mW
Write : 115 mW + I
Hz (typ)
W
5
D
= 350 ).
—1—
Absolute Maximum Ratings (Ta=25 °C)
• Supply voltage
• Write current
• Operating temperature
• Storage temperature
• Allowable power dissipation
• WUS/SE pin input current
Recommended Operating Conditions
• Supply voltage
• Write current
CXA3090N
24 pin SSOP (Plastic)
Topr
Tstg
V
I
V
P
SEH
I
I
CC
W
CC
W
D
–55 to +150
–20 to +75
5.0 V±10
5 to 15 mAo-p
800
20
15
6
E96420-TE
mAo-p
mW
mA
°C
°C
%
V

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cxa3090n Summary of contents

Page 1

... 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 channel heads. Features • ...

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... DRIVER AMP 8 H3Y 9 H4X DRIVER AMP 10 H4Y 11 H5X DRIVER AMP 12 H5Y MODE CONTROL WRITE CURRENT SOURCE AMP HEAD SELECT WRITE UNSAFE DETECTOR POWER ON/OFF DETECTOR IC PROTECTOR —2— CXA3090N 24 GND 23 R RDY 20 RDX 19 HS0 18 HS1 17 HS2 16 WDX 15 WDY 14 WUS/ ...

Page 3

... H5X 10 12 H5Y WUS/ WDY 16 WDX Equivalent circuit V CC GND V CC GND V CC GND —3— CXA3090N Description Head. 6 channels provided. Write unsafe detection output / Servo Enable signal input. Differential P-ECL write data input power supply. ...

Page 4

... CC 2.1V GND V CC GND GND —4— CXA3090N Description Head select signal input. Selects one of 6 heads according to Table 2. Read/Write signal input At “High” : Read, at “Low” : Write. Read Amplifier output. A setting resistor for the write current value is connected between this pin and GND. ...

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... CXA3090N ...

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... CXA3090N ...

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... CXA3090N ...

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... Write data falling edge µ the time required for Write current to reach from the same time required F —8— CXA3090N =15 mA, L (Head W H Refer to Fig Fig. 4 Min. Typ. Max. Unit 5.8 6.8 Vp-p 0.2 0.4 µs 0.3 0.5 µ ...

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... SG2 0.1µ 1µ 1µ 3. 1µH 1µH 1µH —9— CXA3090N 1µ SG3 5. SG4 S10 ...

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... Timing Chart 1 WDX WDY R RDX RDY Timing Chart 2 WDX WDY 10% WUS T SA2 50% 90% 10 90% Fig. 3 90% 90% 10 50% Fig. 4 —10— CXA3090N 10 SA1 50% ...

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... While maintaing step (2) and (3) above make R/W low, placing the device in servo write mode. WUS/SE HS0 HS1 HS2 X See Table 2 X See Table 3 X Table 1. Mode selection HS1 HS2 Table 2. Head selection to WUS/SE. SEH —11— CXA3090N Mode Write Read Servo Write Head ...

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... When V CC HS0 Table 3. Head selection in Servo Write mode rises above, VTH, the prohibition of these functions is released. HS1 Head —12— CXA3090N 10 MHz) falls below the CC ...

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... 1µH 1µH —13— CXA3090N +5V 1µ 5. 1µH 1µH ...

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... VFB must be more than 2 V. When V frequency becomes more than 1 MHz. The normal operating area of write unsafe detection circuit is changed by head inductance, head DC resistance, write current and other < possible that Write unsafe detection maximum FB —14— CXA3090N =1.4V GND ...

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... L =1 µ µ = 50% 50% 50 Pin 22 —15— CXA3090N V =5V, Ta=25 °C CC Min. Typ. Max. Unit 10 pF 260 350 440 0.6 1 0.2 mAp-p –0.5 0 ...

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... ON OFF 3.8 3.6 – Ambient temperature Ta [°C] Normalized write current vs. Ambient temperature Ta=25°C 1.04 R =3.3k WC 1.02 1 0.98 0.96 –25 0 Ambient temperature Ta [°C] Normalized read amplifier voltage gain vs. Ambient temperature Ta=25°C 1.04 1.02 1 0.98 0.96 –25 0 Ambient temperature Ta [°C] —16— CXA3090N V = =3. = ...

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... NOTE: Dimensions “ ” does not include mold protrusion. SONY CODE EIAJ CODE JEDEC CODE 24PIN SSOP(PLASTIC) 7.8 ± 0 0.13 M 0.65 0.1 ± 0.1 0° to 10° DETAIL A PACKAGE STRUCTURE PACKAGE MATERIAL LEAD TREATMENT SSOP-24P-L01 LEAD MATERIAL SSOP024-P-0056 PACKAGE MASS —17— CXA3090N + 0.2 1.25 – 0.1 0 0.05 0.15 – 0.02 EPOXY RESIN SOLDER/PALLADIUM PLATING 42/COPPER ALLOY 0.1g ...

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