CXA1720Q
Pin
No.
18
Symbol
VREF
Pin voltage
2.8 V
Equivalent circuit
Description
Connection for internal reference voltage
decoupling capacitor. Connect the decoupling
capacitor CREF between this pin and A.GND.
Vcc
18
500
120µ
A.GND
Vcc
19
PREAMP
OUT
2.8 V
Pre-amplifier output.
140
19
320µ
A.GND
21
22
23
24
HEAD 1B
HEAD 1A
HEAD 0B
HEAD 0A
—
—
—
—
Connection for magnetic head input/output.
23 22 21
24
Connect the recording/playback magnetic head to
these pins, and connect the center tap to VCC.
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.
A.GND
25
27
26
28
W/C1SET
W/C2SET
Connection for 1M write current setting resistor.
Connect the Write current setting resistor RW1
between this pin and VCC to set the Write current.
Vcc
1.2V
147
147
25
27
Connection for 2M Write current setting resistor.
Connect the Write current setting resistor RW2
between this pin and VCC to set the Write current.
A.GND
W/C1
—
—
Connection for 1M Write current compensation
resistor.
Vcc
COMP
Connect the Write current compensation resistor
RWC1 between this pin and Pin 25 (W/C1SET) to
set the amount of increase in the Write current.
Connection for 2M Write current compensation
resistor.
26
28
W/C2
COMP
Connect the Write current compensation resistor
RWC2 between this pin and Pin 27 (W/C2SET) to
set the amount of increase in the Write current.
A.GND
—5—
SONY [ SONY CORPORATION ]
