参数资料
型号: MAX3668EHJ+T
厂商: Maxim Integrated
文件页数: 5/12页
文件大小: 0K
描述: IC LSR DRVR 622MBPS 3.63V 32TQFP
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: 622Mbps
通道数: 1
电源电压: 3.14 V ~ 5.5 V
电流 - 电源: 38mA
电流 - 调制: 75mA
电流 - 偏置: 80mA
工作温度: -40°C ~ 85°C
封装/外壳: 32-TQFP
供应商设备封装: 32-TQFP(5x5)
包装: 带卷 (TR)
安装类型: 表面贴装
+3.3V, 622Mbps SDH/SONET
Laser Driver with Automatic Power Control
Typical Operating Characteristics (continued)
(V CC = +3.3V, T A = +25°C, unless otherwise noted.)
1000
AVAILABLE BIAS CURRENT
vs. MAXIMUM BIAS SET RESISTOR
25
DISTRIBUTION OF MODULATION CURRENT
STABILITY (WORST CASE)
DISTRIBUTION OF MONITOR DIODE CURRENT
STABILITY (WORST CASE)
25
100
V CC = +3.3V, + 5V
20
T A = -40°C TO +85°C
I MOD = 5mA
20
T A = -40°C TO +85°C
I MD = 18 μ A
15
15
10
CLOSED-LOOP OPERATION
10
10
1
0.1
V CC = +3.3V
V CC = +5V
5
0
5
0
1.4
1.6
1.8
2.0
2.2
2.4
2.6
-25
65
155
245
335
425
515
-88
-52
20
92
160
R BIAS (k ? )
MODULATION DIODE CURRENT STABILITY (ppm/°C)
MONITOR DIODE CURRENT STABILITY (ppm/°C)
Pin Description
PIN
1, 2, 6, 15,
17, 20, 24
3
4
5, 7, 8, 10,
14, 21, 22, 30
9
11
12, 13, 26,
27, 28
16
18
19
23
25
29
31
32
NAME
V CC
DATA+
DATA-
GND
ENABLE
FAIL
N.C.
BIAS
OUT+
OUT-
MD
CAPC
APCSET
MODSET
BIASMAX
FUNCTION
Positive Supply Voltage
Positive PECL Data Input
Negative PECL Data Input
Ground
TTL/CMOS Enable Input. High for normal operation, low to disable laser bias and modulation
currents. Internally pulled high.
TTL Output. Indicates APC failure when low. Internally pulled high through a 6k ? resistor.
No Connection. Leave unconnected.
Laser Bias Current Output. Isolate from laser with a ferrite bead.
Positive Modulation Current Output. I MOD flows into this pad when the input signal is high.
Connect this pad to AC coupling network.
Negative Modulation Current Output. I MOD flows into this pad when the input signal is low.
Connect this pad to V CC through a 6.3 ? resistor.
Monitor Photodiode Connection. Connect this pad to the monitor photodiode anode. A capaci-
tor to ground is required to filter high-speed AC monitor photocurrent.
APC Compensation Capacitor. A 0.1μF capacitor connected from this pad to ground controls
the dominant pole of the automatic power control (APC) feedback loop.
APC Set Resistor. A resistor connected from this pad to ground sets the desired average opti-
cal power. The resulting current is equal to the desired DC monitor diode current. Connect a
100k ? resistor from this pad to ground if APC is not used.
Modulation Set Resistor. A resistor from this pad to ground sets the laser modulation current.
Maximum Bias Set Resistor. A resistor from this pad to ground sets the maximum laser bias
current. The APC function can subtract from this maximum value but cannot add to it. This
resistor controls the bias-current level when the APC loop is not used.
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5
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