CXA3171N datasheet(9/18 Pages) SONY

Numer części	CXA3171N

Szczegółowy opis	4ch. Read/Write Amplifier for three terminal MIG Head of Hard Disk Drive

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Producent	SONY [Sony Corporation]

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—9—

CXA3171N

Unless otherwise specified, VCC=5 V, Ta=25 °C, fWD (Write data frequency) =5 MHz, IW=20 mA, LH (Head

inductance) =1 µH, RH (Head DC resistance value) =12

Ω

Refer to Fig. 2 to Fig. 4

No.

14

15-1

15-2

16-1

16-2

17

18

19

Item

Head differential

voltage amplitude

Mode switching time

Read to Write

Mode switching time

Write to Read

Mode switching time

safe to unsafe

Mode switching time

unsafe to safe

Head switching time

Write current

propagation delay

time

Write current

rise/fall time

Measurement conditions

Differential voltage between HX pin and HY pin

at switching of Write current

TRW is the time required for Write current to turn

to 90 % after Pin 23 changes from “High” to

“Low”.

TWR1 is the time required for the Read amplifier

output∗ to turn to 90 % after Pin 23 changes

from “Low” to “High”.

TWR2 is the time required for Write current to

decreases to 10 % after Pin 23 changes from

“Low” to “High”.

TSA1 is the time required for Pin 14 to turn

“High” after the last transition of Write data

when Write data is stopped in Write mode.

TSA2 is the time required for Pin 14 to turn “Low”

after the first transition of Write data in Write

mode.

TH is the time required for the Read amplifier

output

∗ to reach 90 % when the selected head

switched in Read mode.

TPD is the time required for Write current to

reach 90 % after the Write data falling edge.

LH=0 µH, RH=0

Ω

TR is the time required for Write current to reach

90 % from 10 %; TF is the same time required

to reach 10 % from 90 %. LH=0 µH, RH=0

Ω

Symbol

VSW

TRW

TWR1

TWR2

TSA1

TSA2

TH

TPD

TR/TF

Min. Typ. Max. Unit

9

Vp-p

130 150

ns

180 220

ns

100 200

ns

1.0

2.3

3

µs

0.6

µs

0.6

µs

2

7

ns

1

3

ns

∗Read amplifier output 100 mVp-p 10 MHz

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