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AT78C7005

Features: • Operates from Single Supply: 3.3V or 5V• Small Footprint 64-Pin TQFP Package or Flip Chip• Precision Low-voltage Monitor Circuitry for the Power Supply• Master Power on Reset• Serial Port Interface with Read-back Capability• Over-temperature Protecti...

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SeekIC No. : 004290639 Detail

AT78C7005: Features: • Operates from Single Supply: 3.3V or 5V• Small Footprint 64-Pin TQFP Package or Flip Chip• Precision Low-voltage Monitor Circuitry for the Power Supply• Master Po...

AT78C7005 Data Sheet

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Part Number:
AT78C7005
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/7/15

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Product Details

Description



Features:

• Operates from Single Supply: 3.3V or 5V
• Small Footprint 64-Pin TQFP Package or Flip Chip
• Precision Low-voltage Monitor Circuitry for the Power Supply
• Master Power on Reset
• Serial Port Interface with Read-back Capability
• Over-temperature Protection/Warning
• Shock Sensor Signal Processing
• On-chip 1.8V, 2.5V and -3V Regulators
• Low Power Consumption, 9 mA in Normal Run Mode
• Spindle Driver
   Commutator is Driven by a FLL for High Immunity to Jitter
   Programmable 10-bit DAC
   Adjustable Slew Rate Control
   External Startup Capability
   1.0A Current Capability with Ron = 1
   Digital Commutation Delay and Blanking
   Programmable Delay from BEMF Zero Crossing
   External INDEX Signal for Spin Lock
   Active Spindle Braking Capability
• VCM Driver
   0.4A Current Capability with Ron = 1.5
   Programmable 14-bit DAC
   Ramp Load/Unload Capability with 10-bit ADC
   Power-off Retract with 9V Charge-pump
   Programmable VCM Current Controlled by Sense Resistor
• Available in a Variety of Packages Depending on Customer Requirements


Description

The AT78C7005 is a CMOS monolithic device that integrates Spindle and VCM controllers as well as power stages into one chip. The device operates from 3.3V or 5V power supply. The AT78C7005 is designed for a small-form-factor hard disk drive application. A precision low-voltage detection circuit monitors the power supply and initiates VCM retract at voltage fault condition. A 3-line serial port interface with read back capability provides interface to the microprocessor.

The Spindle driver features a transconductance amplifier, a current sense amplifier, power output drivers, sequencer, internal delay/masking logic, Spindle brake circuit, FLL, and charge-pump for locking the spindle to the programmed rotational speed.The VCM driver features a transconductance amplifier AT78C7005, differential input current sense amplifier, ramp load/unload capability, and power output amplifier.




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