Typical current profile, Conducted noise | Seagate ST3750840ACE

2.8.1.1Typical current profile

Figure 1 Typical 5V startup and operation current profile

Figure 2 Typical 12V startup and operation current profile

2.8.2Conducted noise

Input noise ripple is measured at the host system power supply across an equivalent 80-ohm resistive load on the +12 volt line or an equivalent 15-ohm resistive load on the +5 volt line.

•Using 12-volt power, the drive is expected to operate with a maximum of 120 mV peak-to-peak square-wave injected noise at up to 10 MHz.

•Using 5-volt power, the drive is expected to operate with a maximum of 100 mV peak-to-peak square-wave injected noise at up to 10 MHz.

Note. Equivalent resistance is calculated by dividing the nominal voltage by the typical RMS read/write current.

12	DB35.3 Series PATA Product Manual, Rev. B

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Contents

DB35.3 Series Pata Page Contents DB35.3 Series Pata Product Manual, Rev. B List of Figures DB35.3 Series Pata Product Manual, Rev. B Introduction DB35.3 Series Pata Product Manual, Rev. B Drive specifications Specification summary table Drive specification ST3750840ACE ST3500830ACE ST3400820ACE DB35.3 Series Pata Product Manual, Rev. B Drive specification ST3320820ACE ST3300820ACE ST3250820ACE DB35.3 Series Pata Product Manual, Rev. B Formatted capacity Default logical geometryLBA mode Cylinders Read/write heads Sectors per track 16,383 Recording and interface technology Physical characteristicsDrive specification 750GB 500GB 400GB 320GB 300GB 250GB Power specifications Seek timeStart/stop times Standby mode DC power requirements Typical current profile Conducted noise Idle mode Power-management modesActive mode Sleep mode Environmental specifications Nonoperating shock Disc models ShockOperating shock 4 Disc models Acoustics Fluid Dynamic Bearing FDB motor acousticsIdle CE seek profile Reliability Safety certificationElectromagnetic immunity Agency certification Australian C-Tick N176 Electromagnetic compatibilityKorean RRL FCC verification Environmental protection Corrosive environmentEuropean Union Restriction of Hazardous Substances RoHS DB35.3 Series Pata Product Manual, Rev. B Configuring and mounting the drive Handling and static discharge precautions Breather filter hole precautions Breather filter hole location Drive as master with a non-ATA-compatible slave Jumper settingsMaster/slave configuration Cable-select option Drive mounting Ultra ATA/100 cable Mounting dimensions-top, side and end view DB35.3 Series Pata Product Manual, Rev. B ATA interface signals and connector pins Pins and supported ATA signalsATA interface Supported ATA commands Command name Command code in hex F4H Identify Device command Word Description Value Xx07H Description if bit is set to Bit Word Bit Word Set Features command 0CH 4 S.M.A.R.T. commands Code in features Register A.R.T. command Presales Support Seagate Technology support servicesInternet Technical Support Warranty Service Data Recovery Services Authorized Service CentersData Recovery Services Call Center Toll-free Direct dial Index Page TMR DB35.3 Series Pata Product Manual, Rev. B Page Seagate Technology LLC