L6440

更新时间： 2024-09-23 03:49:55

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		驱动器消费电路商用集成电路放大器信息通信管理
页数	文件大小	规格书
3页	68K
描述
4-Channel ultra low power GMR-TMR preamplifier for HDD applications

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技术参数
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L6440 技术参数

生命周期：	Obsolete	零件包装代码：	DIE
包装说明：	DIE	Reach Compliance Code：	compliant
HTS代码：	8542.39.00.01	风险等级：	5.84
Is Samacsys：	N	商用集成电路类型：	CONSUMER CIRCUIT
JESD-30 代码：	R-XUUC-N	功能数量：	1
最高工作温度：	85 °C	最低工作温度：	-25 °C
封装主体材料：	UNSPECIFIED	封装代码：	DIE
封装形状：	RECTANGULAR	封装形式：	UNCASED CHIP
认证状态：	Not Qualified	最大供电电压 (Vsup)：	3.6 V
最小供电电压 (Vsup)：	3.3 V	表面贴装：	YES
技术：	BICMOS	温度等级：	OTHER
端子形式：	NO LEAD	端子位置：	UPPER
Base Number Matches：	1

L6440 数据手册

L6440

4-Channel ultra low power GMR-TMR preamplifier

for HDD applications

Data Brief

Feature summary

■ Flip Chip package

■ 4-channel configuration

■ Dual Power Supplies of +3V, +20% -10%

and -2.1V, 6%

■ Operating Temperature Range -25°C to +85°C

Flip Chip (Bumped die)

■ Supports xGMR heads from 50 to 500 Ohms

This part is specially designed to have minimum

dissipation in all the modes of operation (Sleep

<200mW, Read <60mW, Write <200mW) and

very fast Sleep to Read recovery time (S2R

<500ns).

and perpendicular write heads

■ Data Rate up to 600Mb/s

■ Sleep mode power consumption < 200µW

■ Sleep-to-read recovery time < 500ns

■ Read mode power consumption < 60mW

It is designed for use with 4-terminal Giant

Magneto Resistance / Tunnel Magneto

(RMR=250Ohm, Ibias =400µA, NF<2dB)

■ Read Bandwidth (-3dB): 50kHz - 450MHz

■ Read Gain selectable from 20dB to 38dB

Resistance read and Perpendicular write heads.

In read mode, the device consists of a fully

differential amplifier, offering: current or voltage

bias, voltage-sense input, programmable input

impedance, a wide-range read gain, low-noise

and high-bandwidth. In write mode, it includes fast

current switching differential write drivers, which

support data rates up to 600 Mb/s, overshoot

amplitude and duration programmability. In all the

modes of operations Fly Height Control circuit is

available. This circuit delivers an accurate

programmable voltage or power to a resistive

element near the write head to match write

current induced heating and subsequent

expansion or protrusion of the pole tip which

effect the media spacing.

■ Write mode power consumption < 200 mW @

600Mb/s measured with single head 100%

Write mode duty cycle, 127b PRBS,

Iw = 40mA, OSC = 100mA (0-pk),

OSD = 500ps (PW50), with Heater off

■ Write voltage launched up to 6V differential

■ Accurate Flying Height Control using voltage or

power output

■ ESD diodes for MR head protection

■ Differential Current and Voltage Bias / Voltage

Sense architecture

■ Bi-directional 16-bit serial interface 2.5V and

3.3V CMOS compatible

The part is further comprehensive of an extensive

analog/digital measurement scheme for the read,

write, heater heads and die temperature, of an

extensive fault detection and reporting scheme,

thermal asperity detection and correction, write

degauss function.

Description

The L6440 is a BICMOS Silicon Germanium

monolithic integrated circuit differential

preamplifier for Ultra Low Power Hard Disk Drive

applications.

Order code

Part number

Package

Flip Chip (Bumped die)

Operating temp. range

L6440

-25°C to +85°C

July 2006

Rev 1

1/3

For further information contact your local STMicroelectronics sales office.

www.st.com

12 3

中文翻译

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