AT78C7015 Datasheet | Atmel

Features - - - - - - - - - - Operates from Single Supply: 3.3V 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 m A in Normal Run Mode Spindle Driver - mutator is Driven by a FLL for High Immunity to Jitter - Programmable 10-bit DAC - Adjustable Slew Rate Control - External Startup Capability - 0.4A Current Capability with Ron = 1.4Ω - Digital mutation 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 = 2.2Ω - Programmable 14-bit DAC - Ramp Load/Unload Capability with 10-bit ADC - Programmable VCM Current Controlled by Sense Resistor - Packaging: Variety Available Depending on Customer Needs Spindle/VCM Motor Controller/ Drivers AT78C7015 Summary Description The AT78C7015 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 power supply. The AT78C7015 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, differential input current sense amplifier, ramp load/unload capability, and power output amplifier. 3439BS- NETST- 5/04 Note: This is a summary document. A...