MAX3643 查看數據表（PDF） - Maxim Integrated
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MAX3643 Datasheet PDF : 15 Pages
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MAX3643
155Mbps to 2.5Gbps Burst-Mode Laser Driver
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15, 18
16
17
19
20
21
22
23
24
—
Pin Description
NAME
VCCA
IN+
IN-
VCCS
BEN+
BEN-
BENOUT
EN
BCMON
IMAX
MDOUT
MDIN
BIAS-
BIAS+
VCCO
OUT+
OUT-
GND
MODSET
VMSET
VREF
VBSET
BIASSET
EP
FUNCTION
Analog Supply Voltage
Noninverted Data Input, LVPECL Compatible
Inverted Data Input, LVPECL Compatible
Signal Supply Voltage
Noninverted Burst-Enable Input, LVPECL Compatible
Inverted Burst-Enable Input, LVPECL Compatible
Burst-Enable Output, LVCMOS. Signal replicates BEN input.
Enable Input LVCMOS. Active low enables BIAS± and OUT± outputs.
Bias Current Monitor. Current out of this pin develops a ground-referenced voltage across an
external resistor proportional to the bias current.
Current-Limit Reference. Connect a resistor from IMAX to GND to set maximum IBIAS plus IMOD.
Monitor Diode Out. Analog Output for sample/hold.
Monitor Diode In. Analog Input for sample/hold.
Connect BIAS- to VCC Through a 10 Resistor and Switching Diode
Laser Bias Current Output. Modulation current flows into this pin when BEN input is high.
Output Supply Voltage
Laser Modulation Current Output. Modulation current flows into this pin when both BEN and IN
inputs are high.
Connect OUT- to Laser Diode Anode Through a 15 Resistor and Switching Diode
Supply Ground. This pin must be connected to ground.
Modulation Current Set. Current from this pin to ground sets the laser modulation current.
MODSET Reference. A ground-referenced voltage at this point establishes the MODSET reference.
Reference Voltage Output. May be used for VMSET, VBSET.
BIASSET Reference. A ground-referenced voltage at this point establishes the BIASSET reference.
Bias Current Set. Current from this pin to ground sets the laser bias current.
Exposed Paddle (Ground). The exposed pad must be soldered to the circuit board ground for proper
thermal and electrical operation.
8
Maxim Integrated
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