This document provides preliminary information on a new product under development, featuring selectable current bias or voltage bias, single-ended read input, adjustable MR bias current and MR bias voltage, programmable gain, and write frequency.
The L6326 is a two channel voltage sense current bias or voltage bias integrated circuit GMR pre-amplifier designed for use with four-terminal magneto-resistive (AMR and GMR) read/inductive write heads. The device consists of a low-noise high bandwidth read amplifier and includes fast current switching write drivers which support data rates up to 500 Mb/s.
The GMR pre-amplifier provides programmable read current/voltage bias and write current, along with servo writing features. Read amplifier gain, write current wave shape (overshoot and damping) can be adjusted, and a thermal asperity detection and correction circuit can be enabled and programmed through a 16-bit bi-directional serial interface.
The device supports data rates up to 500 Mb/s.
The device operates from a +5V supply and a +8V supply.