TZA1000 Просмотр технического описания (PDF) - Philips Electronics

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TZA1000

QIC read-write amplifier

Philips Electronics 

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MR

HEAD

BIAS

(YOKE)

WRITER

VDD3 9

12 V

ISENSE 8

INA 6

INB 7

BIASA 24

BIASB 23

WX 1

WY 3

SENSE

CURRENT

SOURCE

0 to 30 mA

PREAMP

4/34/40 dB

−10 dB

−4 dB

13 dB

BIAS

+ FB

SERVO

PREAMP

DAC

(I)

7+1-bit

VARIABLE

GAIN

10 to 25 dB

4 to 19 dB

TEST

GEN

DAC

(V)

5-bit

HPF

1 to 10 MHz

SIG/

YOKE

22 dB

LPF

1 to 10 MHz

5

VDD1 5 V

17

VDD2 5 V

19

OUTA

0 dB

18

OUTB

13

HOLD

AGC

CONTROL

CIRCUIT

LEVEL

DETECTOR

INTERNAL

REFERENCE

VOLTAGES

TZA1000

BANDGAP

REF

CONTROL

CIRCUIT

20

Vref

15

CLK

12

SDIO

10

SCLK

11

SDEN

WRITE

CIRCUIT

10 to 100 mA

DAC

(I)

7-bit

WRITE

UNSAFE

DETECTOR

14

WGATE

TOGGLE

WDI to WD

4

WD

2

VSS1

16

VSS2

VDD3

VDD1

POWER

FAIL

22

RESET

DETECTOR

CURRENT 21

REF

Iref

MGG660

Fig.1 Block diagram.

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