MAX3646(2004) 데이터 시트보기 (PDF) - Maxim Integrated

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MAX3646
(Rev.:2004)

155Mbps to 622Mbps SFF/SFP Laser Driver with Extinction Ratio Control

Maxim Integrated 

155Mbps to 622Mbps SFF/SFP

Laser Driver with Extinction Ratio Control

ELECTRICAL CHARACTERISTICS (continued)

(VCC = +2.97V to +3.63V, TA = -40°C to +85°C. Typical values are at VCC = +3.3V, IBIAS = 60mA, IMOD = 60mA, TA = +25°C, unless

otherwise noted.) (Notes 1, 2)

PARAMETER

APC Loop Time Constant

APC Setting Stability

APC Setting Accuracy

IMOD Compensation-Setting

Range by Bias

SYMBOL

CONDITIONS

CAPC_FILT = 0.01µF, ∆IMD / ∆IBIAS = 1/70

(Note 6)

TA = +25°C

K

K = ∆IMOD / ∆IBIAS

MIN TYP MAX UNITS

3.3

µs

±100 ±480 ppm/°C

±15

%

0

1.5 mA/mA

IMOD Compensation-Setting

Range by Temperature

TC TC = ∆IMOD / ∆T (Note 6)

0

1.0 mA/°C

Threshold-Setting Range for

Temperature Compensation

TTH (Note 6)

+10

+60

°C

LASER SAFETY AND CONTROL

Bias and Modulation Turn-Off

Delay

CAPC_FILT = 0.01µF, ∆IMD / ∆IBIAS = 1/80

(Note 6)

5

µs

Bias and Modulation Turn-On

Delay

CAPC_FILT = 0.01µF, ∆IMD / ∆IBIAS = 1/80

(Note 6)

600

µs

Threshold Voltage at Monitor Pins VREF Figure 5

1.14

1.3

1.39

V

INTERFACE SIGNALS

TX_DISABLE Input High

TX_DISABLE Input Low

TX_DISABLE Input Current

TX_FAULT Output Low

VHI

VLO RPULL = 45kΩ (typical)

VHI = VCC

VLO = GND

Sinking 1mA, open collector

2.0

V

0.8

V

15

µA

-70 -140

0.4

V

Shutdown Output High

Shutdown Output Low

Sourcing 100µA

Sinking 100µA

VCC - 0.4

V

0.4

V

Note 1: AC characterization is performed using the circuit in Figure 2 using a PRBS 223 - 1 or equivalent pattern.

Note 2: Specifications at -40°C are guaranteed by design and characterization.

Note 3: Excluding IBIAS and IMOD. Input data is AC-coupled. TX_FAULT open, SHUTDOWN open.

Note 4: Power-supply noise rejection (PSNR) = 20log10(Vnoise (on VCC) / ∆VOUT). VOUT is the voltage across the 15Ω load when IN+

is high.

Note 5: The minimum required voltage at the OUT+ and OUT- pins is +0.75V.

Note 6: Guaranteed by design and characterization.

Note 7: Tested with 00001111 pattern at 622Mbps.

Note 8: DJ includes pulse-width distortion (PWD).

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