LMH6533SP National Semiconductor, LMH6533SP Datasheet

LMH6533SP

Manufacturer Part Number

LMH6533SP

Description

Manufacturer

National Semiconductor

Datasheet

1.LMH6533SP.pdf (11 pages)

Specifications of LMH6533SP

Operating Supply Voltage (max)

5.5V

Mounting

Surface Mount

Lead Free Status / RoHS Status

Not Compliant

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

LMH6533SP

Manufacturer:

NS/国半

Quantity:

20 000

Current page: 1 of 11
Download datasheet (263Kb)

LMH6533

Four –Channel Laser Diode Driver with Dual Output,

LVDS Interface and HFM Oscillator

General Description

The LMH

tion DVD/CD recordable and rewritable systems. The part

contains two high-current outputs for reading and writing the

DVD (650 nm) and CD (780 nm) lasers. Functionality in-

cludes read, write and erase through four separate switched

current channels. The channel currents are summed to-

gether at the selected output to generate multilevel wave-

forms for reading, writing and erasing of optical discs. The

LVDS interface delivers DVD write speeds of 12x and higher

while minimizing noise and crosstalk. The LMH6533 is opti-

mized for both speed and power consumption to meet the

demands of next generation systems. The part features a

150 mA read channel plus one 300 mA and two 150 mA write

channels, which can be summed to allow a total output

current of 500 mA or greater. The channel currents are set

through four independent current inputs.

The part is manufactured in National Semiconductor’s

VIP10

and trench isolation for very high switching speeds at low

power levels. An on-board High-Frequency Modulator (HFM)

oscillator helps reduce low-frequency noise of the laser and

is enabled with the ENOSC pin. The fully differential oscilla-

tor circuit minimizes supply line noise, easing FCC approval

of the overall system. The SELB pin (active HIGH) selects

the output channel and oscillator settings. External resistors

determine oscillator frequency and amplitude for each set-

ting. The write and erase channels can be switched on and

off through dedicated LVDS interface pins.

Block Diagram

LMH

VIP10

LLP

™

is a registered trademark of National Semiconductor.

is a trademark of National Semiconductor Corporation.

™

is a trademark of National Semiconductor Corporation.

process, which features bonded wafer technology

™

6533 is a laser diode driver for use in combina-

DS200277

Features

n Fast switching: Rise and fall times

n Low voltage differential signaling (LVDS) channels

n Low output current noise:

n Dual output: Selectable by SELB pin (active HIGH)

n Four independent current channels

n Integrated AC Coupled HFM Oscillator

n Complete shutdown by ENABLE pin

n 5V single-supply operation

n Logic inputs TTL and CMOS compatible

n Space saving Leadless Leadframe Package LLP

Applications

n Combination DVD/CD recordable and rewritable drives

n DVD camcorders

n DVD video recorders

enable interface for the fast switching lines

— Gain of 300, 300 mA write channel

— Gain of 150, 150 mA low-noise read channel

— Two gain of 150, 150 mA write channels

— 500 mA minimum combined output current

— Selectable frequency and amplitude setting by

— 200 MHz to 600 MHz frequency range

— Amplitude to 100 mA peak-to-peak modulation

external resistors

20027701

0.5nA/

0.8 ns

www.national.com

May 2004

-28

Related parts for LMH6533SP

LMH6533SP Summary of contents

Page 1

... VIP10 ™ trademark of National Semiconductor Corporation. LLP ® registered trademark of National Semiconductor. © 2004 National Semiconductor Corporation Features n Fast switching: Rise and fall times n Low voltage differential signaling (LVDS) channels enable interface for the fast switching lines n Low output current noise: ...

Page 2

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. ESD Tolerance Human Body Model Machine Model + − Supply Voltage (V – Differential Input Voltage Output Short Circuit to Ground (Note 4) Input Common Mode Voltage ...

Page 3

DC Electrical Characteristics Unless otherwise specified, all limits guaranteed for T (Note 8) Symbol Parameter I Supply Current, Write Mode Swr I Supply Current S +5V AC Electrical Characteristics Unless otherwise specified, all limits guaranteed for T (Note 8) ...

Page 4

... Note 13: Input currents are set to 0.3 mA Note 14: Total input current is 4.4 mA (all 4 channels equal) and output currents are summed together (see typical performance characteristics). Connection Diagram Ordering Information Package Part Number 28-Pin LLP LMH6533SP NOPB LMH6533SPX NOPB www.national.com 28-Pin LLP 20027702 Top View Package Marking ...

Page 5

Pin Description Pin # Description 1 Laser driver output channel A 2 Internal Oscillator Enable pin 3 Temp Sensing Diode 4 Read Channel Enable pin 5 Chip Enable pin 6 Supply Voltage A 7 Ground Connection A 8 Read Channel ...

Page 6

Waveforms www.national.com Functional Timing Diagram Enable Timing Read Timing Write Timing 6 20027703 20027704 20027705 20027706 ...

Page 7

Waveforms (Continued) Oscillator Timing 7 20027707 www.national.com ...

Page 8

Detailed Block Diagram www.national.com 20027708 8 ...

Page 9

Application Schematic 9 20027709 www.national.com ...

Page 10

Typical Performance Characteristics fied. Oscillator Amplitude vs. R Headroom & Output Current vs. Total Input Current Noise vs. Frequency www.national.com + 25˚ +5V Oscillator Frequency vs 20027710 20027719 20027721 10 − ...

Page 11

... BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...

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