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LMH6526SPNOPB

更新时间： 2024-11-20 11:37:15

品牌	Logo	应用领域
美国国家半导体 - NSC		驱动器二极管激光二极管
页数	文件大小	规格书
15页	902K
描述
Four-hannel Laser Diode Driver with Dual Output

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LMH6526SPNOPB 数据手册

June 2005

LMH6525/LMH6526

Four–Channel Laser Diode Driver with Dual Output

General Description

Features

n Fast switching: Rise and fall times: 0.6/1.0 ns.

™

The LMH 6525/6526 is a laser diode driver for use in

combination 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. Func-

tionality includes read, write and erase through four separate

switched current channels. The channel currents are

summed together at the selected output to generate multi-

level waveforms for reading, writing and erasing of optical

discs. The LVDS interface delivers DVD write speeds of 16x

and higher while minimizing noise and crosstalk. The

LMH6525/6526 is optimized for both speed and power con-

sumption 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 600 mA or greater. The chan-

nel currents are set through four independent current inputs.

n Low Voltage Differential Signaling (LVDS) channels

enable interface for the fast switching lines

n Low output current noise: 0.24 nA/

n Dual Output: Selectable by SELA/B pin (active HIGH)

SELA = LMH6526

SELB = LMH6525

n Four independent current channels

Gain of 300, 300 mA write channel

Gain of 150, 150 mA low-noise read channel

Two gain of 150, 150 mA write channels

600 mA minimum combined output current

n Integrated AC Coupled HFM Oscillator

Selectable frequency and amplitude setting

by external resistors

200 MHz to 600 MHz frequency range

Amplitude to 100 mA peak-to-peak modulation

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^®-28)

n LMH6525 has differential enable oscillator inputs

n LMH6526 has single ended enable oscillator inputs

An on-board High-Frequency Modulator (HFM) oscillator

helps reduce low-frequency noise of the laser and is enabled

by applying LVDS levels on the ENOSC pins for the

LMH6525, while the LMH6526 is enabled by applying an

asymmetrical signal on the ENOSC pin. The fully differential

oscillator circuit minimizes supply line noise, easing FCC

approval of the overall system. The SELA/B pin (active

HIGH) selects the output channel and oscillator settings.

External resistors determine oscillator frequency and ampli-

tude for each setting. The write and erase channels can be

switched on and off through dedicated LVDS interface pins.

Applications

n Combination DVD/CD recordable and rewritable drives

n DVD camcorders

n DVD recorders

Block Diagrams

20110108

20110109

LLP^®is a registered trademark of National Semiconductor.

™

LMH is a trademark of National Semiconductor Corporation.

DS201101

www.national.com

12 3 4 5 6 7...15

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与LMH6526SPNOPB相关器件

型号	品牌	获取价格	描述	数据表
LMH6526SPX	TI	获取价格	IC,LASER DIODE/LED DRIVER,CMOS,LLCC,28PIN,PLASTIC
LMH6526SPX/NOPB	TI	获取价格	Four-Channel Laser Diode Driver with Dual Output 28-UQFN -40 to 85
LMH6526SPXNOPB	NSC	获取价格	Four-hannel Laser Diode Driver with Dual Output
LMH6533	NSC	获取价格	Four - Channel Laser Diode Driver with Dual Output, LVDS Interface and HFM Oscillator
LMH6533SP	NSC	获取价格	Four - Channel Laser Diode Driver with Dual Output, LVDS Interface and HFM Oscillator
LMH6533SPX	NSC	获取价格	Four - Channel Laser Diode Driver with Dual Output, LVDS Interface and HFM Oscillator
LMH6533SPXNOPB	NSC	获取价格	IC SPECIALTY INTERFACE CIRCUIT, QCC28, ROHS COMPLIANT, LLP-28, Interface IC:Other
LMH6550	NSC	获取价格	Differential, High Speed Op Amp
LMH6550	TI	获取价格	400MHz 差分高速运算放大器
LMH6550_06	NSC	获取价格	Differential, High Speed Op Amp

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