CXA1940N

CXA1940N 4ch. Read/Write Amplifier for Thin Film Head of Hard Disk Drive For the availability of this product, please contact the sales office. 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. 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=310Ω) 20 pin SSOP (Plastic) Block Diagram and Pin Configuration GND 1 DRIVER MODE CONTROL 20 PS H0X 2 19 R/W H0Y 3 AMP WRITE CURRENT SOURCE 18 WC DRIVER H1X 4 AMP 17 RDY H1Y 5 AMP 16 RDX DRIVER H2X 6 HEAD SE...