Description
The CXA3090N is a Read/Write Amplifier for the thin film head of hard disk drive and designed to handle up to 6 channel heads.

Features
• Operate on single +5 V power supply
• Low power consumption
    Read : 85 mW
    Write : 115 mW + IW ×5
• Designed for two terminal thin-film or MIG heads
• Read amplifier emitter follower output featuring 325 times gain (typ).
• Differential input capacitance for Read : 6pF (typ)
• Input noise : 0.47 nV / √ Hz (typ)
• Write current range : 5 to 15 mA
• Differential Head voltage swing : 6.8 Vp-p (typ)
• Differential P-ECL write data input
• Built-in write unsafe detection circuit.
• Built-in Servo write function (3/6 ch).
• Built-in IC protection circuit for short of head and GND.
• Read data outputs are high impedance in write mode.
• Unselected head voltage is GND potential.
• Built-in supply voltage monitor circuit prohibits incorrect write during power on or abnormal voltage.
• Self switching damping resistance (RD = 350 Ω).

Function
    Read, Write and Write unsafe detection for HDD, power supply ON/OFF detection.