TDA5155 데이터 시트보기 (PDF) - Philips Electronics

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TDA5155

Pre-amplifier for Hard Disk Drive (HDD) with MR-read/inductive write heads

Philips Electronics 

Philips Semiconductors

Pre-amplifier for Hard Disk Drive (HDD)

with MR-read/inductive write heads

Preliminary specification

TDA5155

13 CHARACTERISTICS

VCC = 5.0 V; VCC(WD) = 8 V; VGND = 0 V; Tamb = 25 °C; unless otherwise specified.

SYMBOL

PARAMETER

CONDITIONS

MIN.

Read characteristics

IMR

∆IMR

Gv(dif)

MR current adjust range

tolerance (excluding Rext)

differential voltage gain;

note 1

Rext = 10 kΩ; 0.5 mA steps

5

IMR programmed at 10 mA

−

from head inputs to RDx, RDy;

RMR = 28 Ω; IMR = 10 mA;

f = 20 MHz

d4 = 0

−

d4 = 1

−

Ri(dif)

differential input resistance IMR = 10 mA

−

Ci(dif)

differential input

−

capacitance

THD

total harmonic distortion

−

BL

lower signal gain pass-band −3 dB

−

edge

BH

higher signal gain

−3 dB; note 2

pass-band edge

without gain boost

−

(4 nH lead inductance)

with gain boost

−

(50 nH lead inductance)

F

Virn

BF(L)

noise figure

RMR = 28 Ω; IMR = 10 mA;

−

Tamb = 25 °C; f = 20 MHz

input referred noise voltage; RMR = 28 Ω; IMR = 10 mA;

−

note 3

Tamb = 25 °C; f = 20 MHz

lower noise band edge

RMR = 28 Ω; IMR = 10 mA;

−

(+3 dB)

Tamb = 25 °C;

no lead inductance

BF(H)

upper noise band edge

RMR = 28 Ω; IMR = 10 mA;

−

(+3 dB)

Tamb = 25 °C;

no lead inductance

αcs

PSRR

CMRR

channel separation; note 4 unselected head

−

power supply rejection ratio; f < 1 MHz; IMR = 10 mA

−

note 5

f < 100 MHz; IMR = 10 mA

−

common mode rejection

ratio; note 5

from nRx-nRy to RDx-RDy RMR

mismatch < 5%

IMR = 10 mA

f < 1 MHz

−

f < 100 MHz

−

TYP.

−

±4

160

226

13

16

1

−

220

170

3.0

0.9

−

220

50

80

50

45

25

MAX.

20.5

−

−

−

−

−

−

100

−

−

3.2

1.0

400

−

−

−

−

−

−

UNIT

mA

%

Ω

pF

%

kHz

MHz

MHz

dB

nV/√Hz

kHz

MHz

dB

dB

dB

dB

dB

1997 Apr 08

18

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