参数资料
型号: DS1865T+T&R
厂商: Maxim Integrated Products
文件页数: 2/67页
文件大小: 0K
描述: IC PON CONTROL TRI 28-TQFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
系列: *
类型: *
应用: *
安装类型: 表面贴装
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)
DS1865
PON Triplexer Control and
Monitoring Circuit
10
____________________________________________________________________
Detailed Description
The DS1865 integrates the control and monitoring func-
tionality required to implement a PON system using
Maxim’s MAX3643 compact burst-mode laser driver.
The compact laser driver solution offers a considerable
cost benefit by integrating control and monitoring fea-
tures in the low-power CMOS process, while leaving
only the high-speed portions to the laser driver. Key
components of the DS1865 are shown in the
Block
Diagram and described in subsequent sections. Table 1
contains a list of acronyms used in this data sheet.
APC Control
BIAS current is controlled by an average power control
(APC) loop. The APC loop uses digital techniques to
overcome the difficulties associated with controlling
burst-mode systems.
Typical Operating Circuit
BEN+
BEN-
DIS
IN-
IN+
OUT-
BIAS-
BIAS+
MDIN
COMPACT BURST-MODE
LASER DRIVER
DS1865
BURST-MODE
MONITOR/CONTROL CIRCUIT
MDOUT
OUT+
VCC
TX-F
TX-D
SCL
SDA
LOSI
D1
D2
D0
D3
MON2
MON3
MON4
FETG
DAC1
M4DAC
MON1
3.3V
THERMISTOR
APD BOOST DC-DC
BMD
3.3V
VMSET
MODSET
VREF
IMAX
GND
BIASSET
BENOUT
MOD
BIAS
BEN
BCMON
VBSET
TRANSMIT POWER
DISABLE INPUT
RECEIVER LOS
OPEN-DRAIN LOS OUTPUT
FAULT OUTPUT
I2C COMMUNICATION
RECEIVE POWER
ADDITIONAL
DIGITAL I/O
CATV
12V
FTTH CATV
TIA
GAIN
CONTROL
SHUTDOWN
CONTROL
MAX3643
MAX3654
Table 1. Acronyms
ACRONYM
DEFINITION
ADC
Analog-to-Digital Converter
APC
Average Power Control
ATB
Alarm Trap Bytes
DAC
Digital-to-Analog Converter
LUT
Lookup Table
NV
Nonvolatile
PON
Passive Optical Network
QT
Quick Trip
SEE
Shadowed EEPROM
TE
Tracking Error
TXP
Transmit Power
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