参数资料
| 型号： | MAX3735AETG+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 9/18页 |
| 文件大小： | 0K |
| 描述： | IC LSR DRVR 2.7GBPS 3.63V 24TQFN |
| 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： | 2.7Gbps |
| 通道数： | 1 |
| 电源电压： | 2.97 V ~ 3.63 V |
| 电流 - 电源： | 27mA |
| 电流 - 调制： | 85mA |
| 电流 - 偏置： | 100mA |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 24-WFQFN 裸露焊盘 |
| 供应商设备封装： | 24-TQFN-EP（4x4） |
| 包装： | 带卷 (TR) |
| 安装类型： | 表面贴装 |
2.7Gbps, Low-Power SFP Laser Drivers
Pin Description
PIN
1, 4, 8, 14, 18
2
3
5
6
7, 12, 22
9
10
11
13
15, 16
17
19
20
21
23
24
EP
NAME
V CC
IN+
IN-
PC_MON
BC_MON
GND
SHUTDOWN
TX_FAULT
MODSET
BIAS
OUT+
OUT-
MD
APCFILT1
APCFILT2
APCSET
TX_DISABLE
Exposed
Pad
FUNCTION
+3.3V Supply Voltage
Noninverted Data Input
Inverted Data Input
Photodiode Current Monitor Output. Current out of this pin develops a ground-referenced voltage
across an external resistor that is proportional to the monitor diode current.
Bias Current Monitor Output. Current out of this pin develops a ground-referenced voltage across an
external resistor that is proportional to the bias current.
Ground
Shutdown Driver Output. Voltage output to control an external transistor for optional shutdown
circuitry.
Open-Collector Transmit Fault Indicator (Table 1).
A resistor connected from this pad to ground sets the desired modulation current.
Laser Bias Current Output
Noninverted Modulation Current Output. Connect pins 15 and 16 externally to minimize parasitic
inductance of the package. I MOD flows into this pin when input data is high.
Inverted Modulation Current Output. I MOD flows into this pin when input data is low.
Monitor Diode Input. Connect this pin to the anode of a monitor photodiode. A capacitor to ground is
required to filter the high-speed AC monitor photocurrent.
Connect a capacitor (C APC ) between pin 20 (APCFILT1) and pin 21 (APCFILT2) to set the dominant
pole of the APC feedback loop.
See APCFILT1
A resistor connected from this pin to ground sets the desired average optical power.
Transmitter Disable, TTL. Laser output is disabled when TX_DISABLE is asserted high or left
unconnected. The laser output is enabled when this pin is asserted low.
Ground. Must be soldered to the circuit board ground for proper thermal and electrical performance
(see the Exposed Pad Package section).
Detailed Description
The MAX3735/MAX3735A laser drivers consist of three
parts: a high-speed modulation driver, a laser-biasing
block with automatic power control (APC), and safety
circuitry (Figure 4). The circuit design is optimized for
high-speed and low-voltage (+3.3V) operation.
High-Speed Modulation Driver
The output stage are composed of a high-speed differ-
ential pair and a programmable modulation current
source. The MAX3735/MAX3735A are optimized for dri-
ving a 15 ? load; the minimum instantaneous voltage
required at OUT+ is 0.6V. Modulation current swings up
to 60mA are possible when the laser diode is DC-cou-
pled to the driver and up to 85mA when the laser diode
is AC-coupled to the driver.
To interface with the laser diode, a damping resistor
(R D ) is required for impedance matching. The com-
bined resistance of the series damping resistor and the
equivalent series resistance of the laser diode should
equal 15 ? . To reduce optical output aberrations and
duty-cycle distortion caused by laser diode parasitic
inductance, an RC shunt network might be necessary.
Refer to Maxim Application Note HFAN 02.0: Interfacing
Maxim’s Laser Drivers to Laser Diodes for more informa-
tion.
At data rates of 2.7Gbps, any capacitive load at the
cathode of a laser diode degrades optical output perfor-
mance. Because the BIAS output is directly connected
to the laser cathode, minimize the parasitic capacitance
associated with the pin by using an inductor to isolate
the BIAS pin parasitics from the laser cathode.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX3735AEVKIT | 功能描述:激光驱动器 Evaluation Kit for the MAX3735A RoHS:否 制造商:Micrel 数据速率:4.25 Gbps 工作电源电压:3 V to 3.6 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:QFN-16 封装:Tube |
| MAX3735E/D | 功能描述:激光驱动器 RoHS:否 制造商:Micrel 数据速率:4.25 Gbps 工作电源电压:3 V to 3.6 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:QFN-16 封装:Tube |
| MAX3735EGG | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX3735EGG-T | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX3735ETG | 制造商:Maxim Integrated Products 功能描述:2.7GBPS, LOW-POWER SFP LASER DRIVER - Rail/Tube |
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