cxa3090n Sony Electronics, cxa3090n Datasheet - Page 14

• Manufacturer Part Number: cxa3090n
• Description: 6ch. Read/write Amplifier For Thin Film Head Of Hard Disk Drive
• Manufacturer: Sony Electronics

Notes on operation
• This device handles high frequency and high gain signals. Please note the following;
• When using as 2 or 4-channel, short-circuit the X and Y sides of unused head pins or leave them open.
• The WC pin is a constant voltage pin. When noise affects this pin, it creates noise in Write c current.
• Write unsafe detection circuit
Therefore, locate R
This circuit uses the voltage waveforms of the head pins for detection.
Connect V
Make the GND area as large as possible.
VFB must be more than 2 V. When V
frequency becomes more than 1 MHz.
The normal operating area of write unsafe detection circuit is changed by head inductance, head DC
resistance, write current and other.
CC
decoupling capacitor of approximately 1000 pF near the device.
WC
Wave form of write data
Voltage waveform
of head pins (HX, HY)
as close to the device as possible.
V
FB
FB
—14—
< 2 V, it is possible that Write unsafe detection maximum
V
TH
V
TH
GND
=1.4V
CXA3090N