MAX3667E(1998) 查看數據表（PDF） - Maxim Integrated

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MAX3667E
(Rev.:1998)

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

Maxim Integrated 

+3.3V, 622Mbps SDH/SONET Laser Driver

with Automatic Power Control

____________________________Typical Operating Characteristics (continued)

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

APC BANDWIDTH vs. CCOMP

(VARYING MONITOR-TO-LASER

CURRENT GAIN)

100G

10G

1G

100k

10k

1k

100

10

1pF

MEASURED RESULTS

GAIN = 90

GAIN = 60

GAIN = 30

100pF

SIMULATED

RESULTS

10nF

1µF

CCOMP

100µF

SUPPLY CURRENT vs. TEMPERATURE

160

EXCLUDING IBIAS

150

RMODSET = RBIASSET = 2kΩ

10Ω LOAD

140

130

VCC = +5.0V

120

110

VCC = +3.3V

100

90

80

-40 -15 10

35

60

85

TEMPERATURE (°C)

______________________________________________________________Pin Description

PIN

1, 2, 23, 24

3, 6, 8, 13, 14,

15, 18, 20, 22

4

5

7

9, 26, 28, 31

10

11

12

16

17

19, 21

25

27

29

30

32

NAME

VCC

GND

IN+

IN-

DISABLE

N.C.

MODSET

APC

BIASSET

IBIAS

PULLUP

IMOD

MD

APCSET

BIASMON

MODMON

COMP

Supply Voltage Input

FUNCTION

Ground

Positive PECL-Compatible Input

Negative PECL-Compatible Input

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

No Connection

Adjustment for Laser-Diode Modulation Current

Feedback Current for Closed-Loop Laser-Diode Bias Control

Open-Loop Adjustment for Laser-Diode Bias Current

Laser-Diode DC Bias Current

VCC Supply for Internal 31Ω Pull-Up Resistor

Laser-Diode Modulation Current

Input for PIN Monitor Diode Current

Closed-Loop Adjustment for Laser-Diode Bias Current

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

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

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

_______________________________________________________________________________________ 5

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