CXA1940N datasheet(5/16 Pages) SONY

No de pièce	CXA1940N

Description	4ch. Read/Write Amplifier for Thin Film Head of Hard Disk Drive

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Fabricant	SONY [Sony Corporation]

Site Internet	http://www.sony.co.jp

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—5—

CXA1940N

Sym-

SW Conditions

bol

No.

Item

Measurement conditions Min.

Typ. Max. Unit

1-1

1-2

1-3

2-1

2-2

2-3

2-4

3-1

3-2

4

5

6

7

8

Current consump-

tion for Read

Current consump-

tion for Write

Current consump-

tion for Power save

Digital input “Low”

input voltage

Digital input “High”

input voltage

Digital input “Low”

input current

Digital input “High”

input current

Write unsafe output

saturation voltage

Write unsafe output

leak current

Supply power

ON/OFF detector

threshold voltage

Write current setting

range

Write current

tolerance

Read amplifier

differential voltage

gain

Frequency

band width (–3dB)

IR

IW

IP

VIL

VIH

IIL

IIH

VWUS

IWUS

VTH

IW

∆Iw

AV

BW

Test point : I4

Digital input :

Pins 12, 14, 15, 19, 20

“High” applied voltage : 5V

“Low” applied voltage : 0V

Test point :

I3, I5, I6, I7, I8

Output current : 1mA

Test point : V1

Test point : I2

When VCC is lowered

from 5V in Write mode

and IW does not flow

anymore, VCC voltage is

set to VTHOFF. When

VCC is raised from 3V

and IW starts to flow, VCC

voltage is set to VTHON.

Input voltage SG1 :

1mVp-p, 300kHz

Load resistance (RDX,

RDY) : 1k

Ω

Test point : V4 [Vp-p]

Frequency at which AV

lowers by 3dB

AV=

V4

SG1

12

19

26

mA

17

26

35

+IW

0.6

1.1

1.5

mA

0.8

V

2.0

V

–20

µA

70

µA

0.5

V

20

µA

3.6

3.9

4.3

V

520

-8

8

%

245

290

335 V/V

30

MHz

mA

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1 2 3 4 5 6 7 8 9 101112

Electrical Characteristics

(Unless otherwise specified, VCC=5V, Ta=25°C, Write current IW=20mA)

mAo-p

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