描述 Description

The CXA1940N is a Read/Write Amplifier for the thin film head of hard disk drives and designed to handle up to 4-channel heads.

特性 Features

? Operate on single +5V power supply.

? Low power consumption.

Read : 95mW

Write (IW=20mA) : 130mW+IW × 5

Power save : 5.5mW

? Write current can be varied through an external resistor. Built-in stabilizing circuit provides stable current during voltage and temperature drift.

? Drives up to 4 heads.

? Designed for two-terminal thin-film or MIG heads.

? Built-in power save function.

? Read amplifier emitter follower output featuring 290 times gain (Typ.).

? Built-in Write unsafe detection circuit.

? Built-in supply voltage monitor circuit prohibits incorrect Write during power on or abnormal voltage.

? Built-in IC protection circuit for short of head and GND.

? Differential input capacitance for Read : 14pF (Typ.).

? Write data input minimum pulse width : 10ns

? Read data output become high impedance in write mode to improve read data offset when switching from write to read mode.

? Unselected head DC voltage is GND potential.

? Self switching damping resistance (RD=310?)

Function

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