Description
The CXA3541N is a read/write amplifier for GMR-Ind (Giant Magneto Resistive-Inductive) heads used in hard disk drives, and is capable of supporting up to two channels.

Features
• +5V and –3V power supply
• Current bias voltage sense type
• Low power 180mW at read
• Differential read amplifier gain; ×100/135 (RMR = 50Ω)
• Input noise of 0.77nV/√ Hz (typ.), RMR = 50Ω, IB = 5.9mA
• Recovery time write to read; 300ns (typ.)
• Write data is triggered by differential P-ECL signal
• Servo bank write
• Write unsafe detection circuit
• Serial port
    Head selection
    MR bias
    Write current

Applications
    Hard disk drives with GMR-Ind heads