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参数资料
型号： DS1884T+
厂商： Maxim Integrated Products
文件页数： 11/92页
文件大小： 0K
描述： IC SFP PON ONU CTRLR 24TQFN
产品培训模块： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
产品变化通告： DS1884 Series Discontinuation 03/Aug/2012
标准包装： 28
系列： *
DS1884
SFP and PON ONU Controller
with Digital LDD Interface
19
Maxim Integrated
Detailed Description
The DS1884 integrates the control and monitoring func-
tionality required to implement an SFP or PON ONU
system using the Maxim MAX3710 or other compatible
laser driver and limiting amplifier. Key components of the
DS1884 are shown in the Block Diagram and described
in subsequent sections.
Monitors and Fault Detection
Monitors
The DS1884 monitors five ADC channels. This monitoring
combined with the alarm enables (A2h Table 01h/05h)
determines when/if the DS1884 turns off the MAX3710
DACs and triggers the TXFOUT and TXDOUT outputs.
All the monitoring levels and interrupt masks are user-
programmable. See Figure 1.
ADC Monitors and Alarms
The ADC monitors temperature (internal temp sensor),
VCC, laser bias (TXB), laser power (TXP), and receive
power (RSSIC for coarse, RSSIF for fine) using an analog
multiplexer to measure them round-robin with a single
ADC (see the ADC Timing section). The voltage channels
have a customer-programmable full-scale range and all
channels have a customer-programmable offset value
that is factory programmed to a default value (Table 2).
Table 1. Acronyms
Table 2. ADC Default Monitor Full-Scale Ranges
Figure 1. ADC Channel
ACRONYM
DESCRIPTION
ADC
Analog-to-Digital Converter
APC
Automatic Power Control
APD
Avalanche Photodiode
DAC
Digital-to-Analog Converter
LOS
Loss of Signal
LUT
NV
Nonvolatile
QT
Quick Trip
ROSA
Receiver Optical Subassembly
SEE
Shadowed EEPROM
SFF
Small Form Factor
SFF-8472
Document Defining Register Map of SFPs
and SFFs
SFP
Small Form-Factor Pluggable
SFP+
Enhanced SFP
TE
Tracking Error. Deviation from linear of the
relationship between transmitted power and
monitor diode current.
TIA
Transimpedance Amplifier
TOSA
Transmit Optical Subassembly
TXP
Transmit Power
SIGNAL (UNITS)
+FS SIGNAL
+FS HEX
-FS SIGNAL
-FS HEX
Temperature (°C)
127.996
7FFFh
-128
8000h
VCC (V)
6.5528
FFF8h
0
0000h
TXB, TXP, RSSIC, RSSIF (V)
2.4997
FFF8h
0
0000h
ADC
13
OFFSET
REGISTERS
SCALE
REGISTERS
13
RIGHT-SHIFT
SETTINGS
COMPARE
ANALOG INPUT
*USER MUST CALIBRATE THE GAIN USING THE SCALE REGISTERS IN CASE RIGHT-SHIFTING IS DESIRED TO MAINTAIN CORRECT BIT WEIGHTING.
TXFINT
SHIFT
ALARM AND WARNING
THRESHOLDS
ALARM/
WARNING
FLAGS
ALARM/
WARNING
ENABLES
COUPLED*
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相关代理商/技术参数
参数描述
DS1884T+ 功能描述:ADC / DAC多通道 SFP+ Controller w/ Digi LDD Interface RoHS:否 制造商:Texas Instruments 转换速率: 分辨率:8 bit 接口类型:SPI 电压参考: 电源电压-最大:3.6 V 电源电压-最小:2 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-40
DS1884T+T 功能描述:ADC / DAC多通道 SFP+ Controller w/ Digi LDD Interface RoHS:否 制造商:Texas Instruments 转换速率: 分辨率:8 bit 接口类型:SPI 电压参考: 电源电压-最大:3.6 V 电源电压-最小:2 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-40
DS1886 制造商:未知厂家 制造商全称:未知厂家 功能描述:带有数字LDD接口的SFP和PON ONU控制器
DS1886_V1 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:SFP and PON ONU Controller with Digital LDD Interface
DS1886T+ 功能描述:接口 - 专用 PON ONU/SFP CTRLR W/DIG LDD INT RoHS:否 制造商:Texas Instruments 产品类型:1080p60 Image Sensor Receiver 工作电源电压:1.8 V 电源电流:89 mA 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:BGA-59
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