GENERAL DESCRIPTION
The 5.0 V pre-amplifier for HDD described here is designed for five terminals, dual stripe Magneto-Resistive (MR)-read/inductive-write heads. The disks of the disk drive are connected to ground. To avoid voltage break-through between the heads and the disk, the MR elements of the heads are also connected to ground. The symmetry of the dual-stripe head-amplifier combination automatically distinguishes between the differential signals such as signals and the common-mode effects like interference. The latter are rejected by the amplifier.

FEATURES
• Designed for 4 (TDA5153BG) or 6 dual-stripe MR-read/inductive write heads
• Current bias-current sense architecture
• Single supply voltage (5.0 V ±10%); a separate write drivers supply pin can be biased from VCC to 8 V +10%
• MR elements connected to ground (GND)
• Equal bias currents in the two MR stripes of each head
• On-chip AC couplings eliminate MR head DC offset
• 3-wire serial interface for programming
• Programmable high-frequency zero-pole gain boost
• Programmable write driver compensation capacitance
• Programmable MR bias currents and write currents
• 1-bit programmable read gain
• Sleep, standby, active and test modes available
• Measurement of head resistances in test mode
• In test mode, one MR bias current may be forced to a minimum current
• Short write current rise and fall times with near rail-to-rail voltage swing
• Head unsafe pin for signalling of abnormal conditions and behaviour
• Low supply voltage write-current inhibit (active or inactive)
• Supports servo writing
• Provides temperature monitor
• Thermal asperity detection with programmable threshold level
• Requires only one external resistor.

APPLICATIONS
• Hard Disk Drive (HDD).