_______________________________________________________________________________________ 3

1Gbps to 11.3Gbps, SFP+ Laser Driver

with Laser Impedance Mismatch Tolerance

ELECTRICAL CHARACTERISTICS (continued)

noted.) (Note 2)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Minimum Bias Current

Current into BIAS pin, DISABLE = low, and

TX_EN = high

5

mA

Bias-Off Current

Current into BIAS pin, DISABLE = high or

TX_EN = low or SET_IBIAS[8:0] = H0x00;

100

F

A

Bias Current DAC Stability

(Notes 2, 4)

1

3

%

Instantaneous Compliance

Voltage at BIAS

0.9

1.5

2.1

V

BMON Current Gain

ground defines voltage

9

10

11

mA/A

Compliance Voltage at BMON

0

1.8

V

BMON Current Gain Stability

1.2

4

%

LASER MODULATOR

TOUT+ and TOUT-

Instantaneous Output

Compliance Voltage

1.0

1.0

V

Maximum Modulation Current

Current into external 25I differential termi-

nation, output common-mode

80

Current into external 50I differential termi-

nation, output common-mode

60

Minimum Modulation Current

10

Differential Output Resistance

50

I

Modulation-Off Maximum Current

Current between TOUT+ and TOUT- when

DISABLE = high or TX_EN = low or

SET_IMOD[8:0] = H0x00

100

F

A

Modulation Current DAC Stability

1.5

3

%

Modulation Current Edge Speed

(Note 2)

22

30

ps

TXDE_MD[1:0] = 3d

22

30

Deterministic Jitter (Notes 2, 5)

DJ

differential load = 50I

5

12

differential load = 25I

5

12

differential load = 5I

7

differential load = 50I (K28.5 pattern)

5

10.5