参数资料
型号: MAX3296CTI+T
厂商: Maxim Integrated
文件页数: 8/28页
文件大小: 0K
描述: IC LASR DRVR 2.5GBPS 5.5V 28TQFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
类型: 激光二极管驱动器(光纤)
数据速率: 2.5Gbps
通道数: 1
电源电压: 3 V ~ 5.5 V
电流 - 电源: 52mA
电流 - 调制: 30mA
工作温度: 0°C ~ 70°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
3.0V to 5.5V, 1.25Gbps/2.5Gbps
LAN Laser Drivers
V CC
I CC
I OUT
V CC
OUT-
FERRITE BEAD*
0.01 μ F
0.01 μ F
OUT+
VOLTS
V IN+
V IN-
DIFFERENTIAL INPUT
RESULTING SIGNAL
100mV P-P MIN
830mV P-P MAX
MAX3286 V CC
V CC
L = 3.9nH
MAX3296
50 ?
50 ?
i MOD
V ID = V IN+ - V IN-
200mV P-P MIN
1660mV P-P MAX
IN+
R L
25 ?
L = 3.9nH
CURRENT
I MOD
V ID
IN-
BIASDRV
(OPEN)
TIME
R MOD
*MURATA
BLM11HA102
MODSET MODULATION
CONTROL
TC
I MOD 3/2
LASER
EQUIVALENT
LOAD
R L = 25 ?
Figure 1a. Output Load for AC Specification
_______________Detailed Description
V CC
t PORDLY
The MAX3286/MAX3296 series of laser drivers contain a
bias generator with APC, laser modulator, power-on reset
POR
FAULT
SHDNDRV
t FAULT
t RESET
t SHUTDN
(POR) circuit, and safety circuitry (Figures 2a and 2b).
Bias Generator
Figure 3 shows the bias generator circuitry containing a
power-control amplifier, controlled reference voltage,
OPTICAL
OUT
EN
FAULT ON MD
NOTE: TIMING IS NOT TO SCALE.
Figure 1b. Fault Timing
t EN_RESET
RESET BY EN SHUTDOWN
BY EN
smooth-start circuit, and window comparator. The bias
generator combined with an external PNP or NPN transis-
tor provides DC laser current to bias the laser in a light-
emitting state. When there is a monitor diode (MD) in the
laser package, the APC circuitry adjusts the laser-bias
current to maintain average power over temperature and
changing laser properties. The MD input is connected to
8
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