cxa1720q Sony Electronics, cxa1720q Datasheet - Page 5

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cxa1720q

Manufacturer Part Number
cxa1720q
Description
Read/write Amplifier With Built-in Filters For Fdds
Manufacturer
Sony Electronics
Datasheet
No.
Pin
18
19
21
22
23
24
25
27
26
28
W/C1SET
W/C2SET
PREAMP
HEAD 1B
HEAD 1A
HEAD 0B
HEAD 0A
Symbol
COMP
COMP
VREF
W/C1
W/C2
OUT
Pin voltage
2.8 V
2.8 V
1.2V
24 23 22 21
320µ
120µ
Equivalent circuit
140
500
147
147
—5—
Vcc
A.GND
19
Vcc
A.GND
18
Vcc
A.GND
A.GND
26
A.GND
28
Vcc
25
27
Connection for internal reference voltage
decoupling capacitor. Connect the decoupling
capacitor CREF between this pin and A.GND.
Pre-amplifier output.
Connection for magnetic head input/output.
Connect the recording/playback magnetic head to
these pins, and connect the center tap to V
When the logical voltage for Pin 7 (SIDE1) is low,
the HEAD1 system is active; when the logical
voltage is high, the HEAD0 system is active.
Connection for 1M write current setting resistor.
Connect the Write current setting resistor R
between this pin and V
Connection for 2M Write current setting resistor.
Connect the Write current setting resistor R
between this pin and V
Connection for 1M Write current compensation
resistor.
Connect the Write current compensation resistor
R
set the amount of increase in the Write current.
Connection for 2M Write current compensation
resistor.
Connect the Write current compensation resistor
R
set the amount of increase in the Write current.
WC1
WC2
between this pin and Pin 25 (W/C1SET) to
between this pin and Pin 27 (W/C2SET) to
Description
CC
CC
to set the Write current.
to set the Write current.
CXA1720Q
CC
W1
W2
.

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