DS1878

更新时间： 2024-09-21 09:56:11

品牌	Logo	应用领域
美信 - MAXIM		控制器
页数	文件大小	规格书
101页	1316K
描述
SFP+ Controller with Digital LDD Interface

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DS1878 数据手册

19-5537; Rev 1; 8/11

SFP+ Controller with Digital LDD Interface

DS178

General Description

Features

The DS1878 controls and monitors all functions for SFF,

SFP, and SFP+ modules including all SFF-8472 func-

tionality. The combination of the DS1878 with Maxim

laser driver/limiting amplifier solutions supports VCSEL,

DFB, and EML-based solutions. The device provides

APC loop, modulation current control, and eye safety

functionality. It continuously monitors for high output

current, high bias current, and low and high transmit

power to ensure that laser shutdown for eye safety

requirements are met without adding external compo-

♦ Meets All SFF-8472 Control and Monitoring

Requirements

♦ Laser Bias Controlled by APC Loop and

Temperature LUT to Compensate for Tracking

Error

♦ Laser Modulation Controlled by Temperature LUT

♦ Six Analog Monitor Channels: Temperature, V

MON1–MON4

MON1–MON4 Support Internal and External

Calibration

nents. Six ADC channels monitor V , temperature,

and four external monitor inputs (MON1–MON4) that

can be used to meet all monitoring requirements.

MON3 is differential with support for common mode to

Scalable Dynamic Range

Internal Direct-to-Digital Temperature Sensor

Alarm and Warning Flags for All Monitored

Channels

. Two digital-to-analog (DAC) outputs with tempera-

ture-indexed lookup tables (LUTs) are available for

additional control functionality.

♦ Two 9-Bit Delta-Sigma Outputs with 36 Entry

Temperature LUTs

♦ Digital I/O Pins: Five Inputs, Four Outputs

Applications

SFF, SFP, and SFP+ Transceiver Modules

♦ Comprehensive Fault-Measurement System with

Maskable Laser Shutdown Capability

♦ Flexible, Two-Level Password Scheme Provides

Ordering Information

Three Levels of Security

PART

DS1878T+

TEMP RANGE

-40°C to +95°C

PIN-PACKAGE

28 TQFN-EP*

♦ 256 Additional Bytes Located at A0h Slave

Address

♦ I C-Compatible Interface

DS1878T+T&R

♦ 3-Wire Master to Communicate with a Maxim

+Denotes a lead(Pb)-free/RoHS-compliant package.

T&R = Tape and reel.

*EP = Exposed pad.

Laser Driver/Limiting Amplifier

♦ +2.85V to +5.5V Operating Voltage Range

♦ -40°C to +95°C Operating Temperature Range

♦ 28-Pin TQFN (5mm x 5mm x 0.75mm) Package

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

12 3 4 5 6 7...101

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与DS1878相关器件

型号	品牌	获取价格	描述	数据表
DS1878T TR	MAXIM	获取价格	SFP+ Controller with Digital LDD Interface
DS1878T+	MAXIM	获取价格	SFP+ Controller with Digital LDD Interface
DS1878T+T&R	MAXIM	获取价格	Analog Circuit, 1 Func, 5 X 5 MM, 0.75 MM HEIGHT, ROHS COMPLIANT, TQFN-28
DS1878T+TR	MAXIM	获取价格	SFP Controller with Digital LDD Interface
DS1881	MAXIM	获取价格	Dual NV Audio Taper Digital Potentiometer
DS1881	ADI	获取价格	双路、非易失、音频、对数数字电位器
DS1881E-045	MAXIM	获取价格	Dual NV Audio Taper Digital Potentiometer
DS1881E-045+	MAXIM	获取价格	Digital Potentiometer, 2 Func, 45000ohm, Push-button Control Interface, PDSO16, LEAD FREE,
DS1881E-045+T&R	MAXIM	获取价格	Digital Potentiometer, 2 Func, 45000ohm, Push-button Control Interface, PDSO16, LEAD FREE,
DS1881E-045R	MAXIM	获取价格	Dual NV Audio Taper Digital Potentiometer

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