MC34250 [MOTOROLA]

HARD DISK DRIVE READ CHANNEL; 硬盘驱动器读取信道


型号：	MC34250
厂家：	MOTOROLA
描述：	HARD DISK DRIVE READ CHANNEL 硬盘驱动器读取信道驱动器
文件：	总5页 (文件大小：100K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

Order this document from Analog Marketing

The Motorola MC34250 is a fully integrated partial response maximum

likelihood disk drive read/write channel for use in zoned recording

applications. This device integrates the AGC, active filter, 7 tap equalizer,

Viterbi detector, frequency synthesizer, servo demodulator, 8/9 rate (0,4/4)

Encoder/Decoder with write precompensation and power management in a

single 64 pin 10 mm x 10 mm TQFP package.

HARD DISK DRIVE

READ CHANNEL

SEMICONDUCTOR

TECHNICAL DATA

FEATURES:

• 50 to 200 MBPS Programmable Data Rate

• 800 mW at 200 MBPS and 5.0 V

• Channel Monitor Output

• Programmable AGC Charge Pump Currents with Different Values for

Data and Servo Envelope Modes and Gain Gradient Mode

• Programmable AGC Peak Detector Droop Currents with Different

Values for Data and Servo Envelope Modes

• Separate AGC Charge Pump Outputs for Data and Servo Modes

• Programmable Dual Threshold Qualifier or Hysteresis Comparator Type

Pulse Detector for Servo Data Detection.

• ERD and Polarity Outputs for Servo Timing and Raw Encoded Data

• Integrated 7 pole 0.05° Equiripple Linear Phase Filter with

Programmable Bandwidth from 5.0 MHz to 80 MHz and Different Values

for Both Data and Servo Modes

FTA SUFFIX

PLASTIC PACKAGE

CASE 840F

• Programmable Symmetrical Boost from 0 to 10 dB and Different Values

(Thin QFP)

for Data and Servo Modes

• Programmable Asymmetrical Boost of Up to ±40% of Nominal Filter

Group Delay in Both Data and Servo Modes

• 7 Tap Continuous Time Transversal Equalizer with 8 Bit Programmable

Tap Weights and Integrated Decision Directed Sign–Sign Least Mean

Squared Adaptation

ORDERING INFORMATION

Operating

Temperature Range

Device

Package

• Internal Offset Cancellation Loops

• Fast Acquisition Data Phase Locked Loop with Zero Phase Restart

• Programmable Data Phase Locked Loop Charge Pump Current

MC34250FTA

= 0° to +70°C

TQFP–64

• Integrated Soft Decision Viterbi Detectors with Programmable Merge

References

• Integrated 8/9 Rate (0,4/4) Encoder and Decoder with Code Scrambler

and Descrambler

• Programmable 2/4/8 Bit NRZ Data Interface

• Programmable Write Precompensation Delays Locked to the Frequency

Synthesizer

• Differential PECL Write Data Outputs

• External Write Data Path for DC Erase or Other Non–Encoded Data

• Integrated Write Current DAC

• Programmable Power Management

• Bi–Directional Serial Microprocessor Interface

• Various Test Modes Controlled Via the Serial Microprocessor Interface

This document contains information on a product under development. Motorola reserves the

right to change or discontinue this product without notice.

MOTOROLA ANALOG IC DEVICE DATA

Motorola, Inc. 1996

Issue 0

MC34250

Simplified Block Diagram

DPLLFP

DPLLFM

IWRITE

BRSTA/DTP1

WCSENSE

WCINHB

BRSTB/DTP2

BRSTC/DTP3

BRSTD/DTP4

SRVOUT

SRVREF

SRVRSTB

SRVSMPLB

SPOL

SERD

SYNTHFM

SYNTHFP

(7)

(6)

GND

This device contains 80,000 active transistors.

MOTOROLA ANALOG IC DEVICE DATA

MC34250

OUTLINE DIMENSIONS

FTA SUFFIX

PLASTIC PACKAGE

CASE 840F–01

(Thin QFP)

ISSUE O

-Z-

-T-, -U-, -Z-

-T-

-U-

DETAIL AA

BASE

METAL

0.20 (0.008)

AB T–U

0.050 (0.002) T–U

0.20 (0.008)

AC T–U

-AB-

SECTION AE-AE

0.10

(0.004)

DETAIL AD

-AC-

MILLIMETERS

MIN MAX

9.950 10.050

INCHES

NOTES:

DIM

MIN

MAX

0.396

0.063

0.011

0.057

0.009

DIMENSIONING AND TOLERANCING PER ANSI

Y14.5M, 1982.

0.392

0.055

0.007

0.053

0.007

CONTROLLING DIMENSION: MILLIMETER.

1.400

0.170

1.350

0.170

1.600

0.270

1.450

0.230

DATUM PLANE -AB- IS LOCATED AT BOTTOM OF

LEAD AND IS COINCIDENT WITH THE LEAD

WHERE THE LEAD EXITS THE PLASTIC BODY AT

THE BOTTOM OF THE PARTING LINE.

DATUMS -T-, -U- AND -Z- TO BE DETERMINED AT

DATUM PLANE -AC-.

0.500 BSC

0.020 BSC

0.050

0.090

0.450

0.150

0.200

0.550

0.002

0.004

0.018

0.006

0.008

0.022

DIMENSIONS S AND V TO BE DETERMINED AT

SEATING PLANE -AC-.

7.500 BSC

0.295 BSC

DIMENSIONS A AND B DO NOT INCLUDE MOLD

PROTRUSION. ALLOWABLE PROTRUSION IS

0.25 (0.010 ) PER SIDE. DIMENSIONS A AND B DO

INCLUDE MOLD MISMATCH AND ARE

DETERMINED AT DATUM PLANE -AB-.

DIMENSION D DOES NOT INCLUDE DAMBAR

PROTRUSION. DAMBAR PROTRUSION SHALL

NOT CAUSE THE D DIMENSION TO EXCEED

0.350 (0.014).

12 REF

0.090 0.160

0.250 BSC

12 REF

0.004 0.006

0.010 BSC

DETAIL AD

1°

0.100

0.200

0.004

0.469

0.008

0.476

11.900 12.100

0.200 REF

0.008 REF

0.039 REF

12 REF

1.000 REF

12 REF

MOTOROLA ANALOG IC DEVICE DATA

MC34250

Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding

the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and

specificallydisclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters which may be provided in Motorola

datasheetsand/orspecificationscananddovaryindifferentapplicationsandactualperformancemayvaryovertime. Alloperatingparameters,including“Typicals”

must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of

others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other

applicationsintended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury

ordeathmayoccur. ShouldBuyerpurchaseoruseMotorolaproductsforanysuchunintendedorunauthorizedapplication,BuyershallindemnifyandholdMotorola

and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees

arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that

Motorola was negligent regarding the design or manufacture of the part. Motorola and

Opportunity/Affirmative Action Employer.

are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal

How to reach us:

USA/EUROPE/Locations Not Listed: Motorola Literature Distribution;

P.O. Box 20912; Phoenix, Arizona 85036. 1–800–441–2447 or 602–303–5454

JAPAN: Nippon Motorola Ltd.; Tatsumi–SPD–JLDC, 6F Seibu–Butsuryu–Center,

3–14–2 Tatsumi Koto–Ku, Tokyo 135, Japan. 03–81–3521–8315

MFAX: RMFAX0@email.sps.mot.com – TOUCHTONE 602–244–6609

INTERNET: http://Design–NET.com

ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park,

51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852–26629298

MOTOROLA ANALOG IC DEVICE DATA

MC34250/D

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MC34250 [MOTOROLA]

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