MAX3667 datasheet(5/12 Pages) MAXIM

Part #	MAX3667

Description	3.3V, 622Mbps SDH/SONET Laser Driver with Automatic Power Control

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Manufacturer	MAXIM [Maxim Integrated Products]

Direct Link	https://www.maximintegrated.com/en.html

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5 / 12 page

+3.3V, 622Mbps SDH/SONET Laser Driver

with Automatic Power Control

_______________________________________________________________________________________

5

10

1k

100

100k

10k

100G

10G

1G

1pF

100pF

10nF

1

µF

100

µF

APC BANDWIDTH vs. CCOMP

(VARYING MONITOR-TO-LASER

CURRENT GAIN)

CCOMP

MEASURED RESULTS

GAIN = 90

GAIN = 30

GAIN = 60

SIMULATED

RESULTS

____________________________Typical Operating Characteristics (continued)

(TA = +25°C, VCC = +3.3V, unless otherwise noted.)

80

100

90

120

110

130

160

140

150

-40

-15

10

35

60

85

SUPPLY CURRENT vs. TEMPERATURE

TEMPERATURE (°C)

EXCLUDING IBIAS

RMODSET = RBIASSET = 2kΩ

10

Ω LOAD

VCC = +5.0V

VCC = +3.3V

______________________________________________________________Pin Description

NAME

FUNCTION

1, 2, 23, 24

VCC

Supply Voltage Input

3, 6, 8, 13, 14,

15, 18, 20, 22

GND

Ground

4

IN+

Positive PECL-Compatible Input

5

IN-

Negative PECL-Compatible Input

11

APC

Feedback Current for Closed-Loop Laser-Diode Bias Control

10

MODSET

Adjustment for Laser-Diode Modulation Current

9, 26, 28, 31

N.C.

No Connection

7

DISABLE

Disable Input. High = disable, TTL-compatible input.

25

MD

Input for PIN Monitor Diode Current

19, 21

IMOD

Laser-Diode Modulation Current

17

PULLUP

VCC Supply for Internal 31Ω Pull-Up Resistor

16

IBIAS

Laser-Diode DC Bias Current

12

BIASSET

Open-Loop Adjustment for Laser-Diode Bias Current

32

COMP

External Compensation Capacitor for Closed-Loop Laser-Diode Bias Current Control Stability

30

MODMON

IMOD Current Monitor (gain = 1/33 IQMOD). Open PNP collector, connect to ground if not used.

29

BIASMON

IBIAS Current Monitor (gain = 1/38 IBIAS). Open PNP collector, connect to ground if not used.

27

APCSET

Closed-Loop Adjustment for Laser-Diode Bias Current

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