MAX3766E/D

更新时间： 2024-01-15 12:10:59

品牌	Logo	应用领域
美信 - MAXIM		驱动器功率控制局域网
页数	文件大小	规格书
20页	253K
描述
622Mbps LAN/WAN Laser Driver with Automatic Power Control and Safety Shutdown

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数据手册

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MAX3766E/D 数据手册

6 2 2 Mb p s LAN/WAN La s e r Drive r w it h

Au t o m a t ic P o w e r Co n t ro l a n d S a fe t y S h u t d o w n

P in De s c rip t io n

NAME

FUNCTION

The current into BIASMAX sets the maximum laser bias current. Connecting BIASMAX directly to REF1

allows the largest possible bias current.

BIASMAX

The resistance (R ) between TC and REF1 programs the temperature coefficient of REF2. Connecting

TC directly to REF1 produces the minimum tempco. Leaving TC unconnected produces the maximum

tempco.

MAX376

REF2 is the reference voltage used to program the modulation current. The tempco of REF2 is pro-

REF2

MOD

grammed by R

The current into MOD programs the laser modulation current. Connect MOD to REF2 with a resistor or

potentiometer.

5, 8

GND

IN-

Ground. All grounds must be connected.

Inverting Data Input

IN+

Noninverting Data Input

Positive Supply Voltage. All V pins must be connected.

ENABLE is a TTL-compatible input. When low or open, this pin disables the output modulation and bias

current.

ENABLE

SAFETY

FAIL

A capacitor to ground at SAFETY determines the turn-on delay for the safety circuits. If SAFETY is

grounded or TTL low, internal safety shutdown features are disabled. A TTL high at SAFETY enables the

internal safety shutdown features.

The FAIL output asserts low if the voltage at MD is above or below nominal. FAIL also asserts if REF1 is

inadvertently tied to the positive supply. FAIL has TTL-compatible output voltage levels.

Supply Voltage for the Output Current Drivers

Inverting Modulation-Current Output

CCOUT

OUT-

OUT+

BIAS

Noninverting Modulation-Current Output

Connection for the DC Laser Bias Current

Ground for the Output Current Drivers

Input for the laser monitor photodiode current.

GNDOUT

The current into POWERSET programs the average optical output power when automatic power

control is used.

POWERSET

REF1

REF1 is a voltage reference used to program laser bias current and average power.

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