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Related Product Information

In This Issue

10-channel preamp

Texas Instruments now offers a new current-bias/voltage-sense preamplifier for use with 4-terminal magneto-resistive (MR) heads in high-performance disk drives. This preamp, the 32R1590AR, supports data rates up to 350 Mbit/s and features read input voltage noise of 0.5 nV/ rt. Hz and read input current noise of 6 pA/ rt. Hz, offering superior system noise performance.

The device supports a bias range of 6 to 12 mA for MR heads from 40 to 80 Ohms and delivers programmable read gains from 150 to 300 V/V over a selectable bandwidth from 150 to 225 MHz. Write voltage swings from 16 V peak-to-peak are supported with typical head current rise times of just 0.9 ns. Write current range is 20 to 60 mA, and advanced features like write unsafe detect, programmable write damping control and enhanced write-to-read recovery are provided for im-proving overall drive design.

The 32R1590AR also offers full programmable operation with a high-speed serial port provided to control head selection, write current, write damping, bias current, thermal asperity compensation, mode selection and other critical drive parameters. This enhanced programmability enables drive designers to evaluate new head/media combinations quickly and adaptive control of key parameters for system optimization.

The device is packaged as solder bumped die for flip chip or bare die for die-on-flex applications. Samples are now available.

For complete information, see: Related Product Information. For literature, send an e-mail message to info@tus.ssi1.com.