参数资料
型号: DS1873T+T&R
厂商: Maxim Integrated
文件页数: 12/86页
文件大小: 0K
描述: IC CTLR SFP+ ANLG LDD 28-TQFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
类型: 激光二极管控制器
通道数: 1
电源电压: 2.85 V ~ 3.9 V
电流 - 电源: 2.5mA
工作温度: -40°C ~ 95°C
封装/外壳: 28-WFQFN 裸露焊盘
供应商设备封装: 28-TQFN-EP(5x5)
包装: 带卷 (TR)
安装类型: 表面贴装
其它名称: 90-1873T+TRL

SFP+ Controller with Analog LDD Interface
Typical Operating Circuit
+3.3V
100 Ω
ROSA
LOS
TOSA
LDD
BIAS MON
DISABLE
MOD
DAC
BIAS
DAC
DS1873
EEPROM
QUICK
TXF
TXD
TXDOUT
TX_FAULT
TX_DISABLE
R BD
MON1
MON2
MON3
TRIP
ADC
I 2 C
SDA
SCL
MODE_DEF2 (SDA)
MODE_DEF1 (SCL)
R MON
LOS
LOS
LOSOUT
LOS
Detailed Description
The DS1873 integrates the control and monitoring func-
tionality required to implement an SFP or SFP+ system.
Key components of the DS1873 are shown in the Block
Diagram and described in subsequent sections.
BIAS DAC/APC Control
The DS1873 controls its laser bias current using its
BIAS DAC and the APC loop. The APC loop’s feedback
to the DS1873 is the monitor diode (MON2) current,
which is converted to a voltage using an external resis-
tor. The feedback is sampled by a comparator and
compared to a digital set-point value. The output of the
comparator has three states: up, down, or no-opera-
tion. The no-operation state prevents the output from
excessive toggling once steady state is reached. As
long as the comparator output is in either the up or
down states, the bias is adjusted by incrementing and
decrementing the BIAS DAC setting.
The DS1873 has an LUT to allow the APC set point to
change as a function of temperature to compensate for
tracking error (TE). The TE LUT has 36 entries that
determine the APC setting in 4°C windows between
-40°C to +100°C.
12
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DS1874 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:SFP+ Controller with Digital LDD Interface
DS1874T+ 功能描述:ADC / DAC多通道 SFP+ Controller w/ Dgtl 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
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DS1874T+T&R 功能描述:ADC / DAC多通道 SFP+ Controller w/ Dgtl 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
DS1874T+TR 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:SFP+ Controller with Digital LDD Interface