參數(shù)資料
型號(hào)： DS1865
廠商： Maxim Integrated Products, Inc.
英文描述： PON Triplexer Control and Monitoring Circuit
中文描述： PON三工器控制及監(jiān)測(cè)電路
文件頁(yè)數(shù)： 1/66頁(yè)
文件大?。?/td> 561K
代理商： DS1865
General Description
The DS1865 controls and monitors all the burst-mode
transmitter and video receiver biasing functions for a
passive optical network (PON) triplexer. It has an APC
loop with tracking-error compensation that provides the
reference for the laser driver bias current and a temper-
ature-indexed lookup table (LUT) that controls the mod-
ulation current. It continually monitors for high output
current, high bias current, and low and high transmit
power with its internal fast comparators to ensure that
laser shutdown for eye safety requirements are met with-
out adding external components. Six ADC channels
monitor V
CC
, internal temperature, and four external
monitor inputs (MON1–MON4) that can be used to meet
transmitter and video receive signal monitoring require-
ments. Two digital-to-analog converter (DAC) outputs
are available for biasing the video receiver channel, and
five digital I/O pins are present to allow additional moni-
toring and configuration.
Applications
Optical Triplexers with GEPON, BPON, or GPON
Transceiver
Features
o
Meets GEPON, BPON, and GPON Timing
Requirements for Burst-Mode Transmitters
o
Bias Current Control Provided by APC Loop with
Tracking-Error Compensation
o
Modulation Current is Controlled by a
Temperature-Indexed Lookup Table
o
Laser Power Leveling from -6dB to +0dB
o
Two 8-Bit Analog Outputs, One is Controlled by
MON4 Voltage for Video Amplifier Gain Control
o
Internal Direct-to-Digital Temperature Sensor
o
Six Analog Monitor Channels: Temperature, V
CC
,
MON1, MON2, MON3, and MON4
o
Five Digital I/O Pins for Additional Control and
Monitoring Functions
o
Comprehensive Fault Management System with
Maskable Laser Shutdown Capability
o
Two-Level Password Access to Protect
Calibration Data
o
120 Bytes of Password 1 Protected Nonvolatile
Memory
o
128 Bytes of Password 2 Protected Nonvolatile
Memory in Main Device Address
o
128 Bytes of Nonvolatile Memory Located at A0h
Slave Address
o
I
2
C-Compatible Interface for Calibration and
Monitoring
o
Operating Voltage: 2.85V to 5.5V
o
Operating Temperature Range: -40°C to +95°C
o
Packaging: 28-Pin Lead-Free TQFN (5mm x 5mm
x 0.8mm)
D
PON Triplexer Control and
Monitoring Circuit
______________________________________________
Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
Rev 0; 3/07
+
Denotes lead-free package.
*
EP = Exposed pad.
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
DS1865T+
-40
°
C to +95
°
C
28 TQFN-EP*
(5mm x 5mm x 0.8mm)
28 TQFN-EP*
(5mm x 5mm x 0.8mm)
tape-and-reel
DS1865T+T&R
-40
°
C to +95
°
C
TQFN
(5mm x 5mm x 0.8mm)
TOP VIEW
26
27
25
24
10
9
11
TX-D
FETG
V
CC
GND
N.C.
12
BEN
BIAS
GND
M4DAC
MOD
DAC1
MON4
1
2
4
5
6
7
20
21
19
17
16
15
S
S
TX-F
V
CC
3
18
28
8
23
13
L
D
B
D
D
D
22
14
M
M
M
N
DS1865
Pin Configuration
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