Rainbow-electronics MAX3798 Bedienungsanleitung PDF herunterladen (Seite 10)

MAX3798

1.0625Gbps to 10.32Gbps, Integrated, Low-

Power SFP+ Limiting Amplifier and VCSEL Driver

10 ______________________________________________________________________________________

OUTPUT EYE DIAGRAM AT 4.25Gbps

MAX3798 toc10

50ps/div

100mV/div

MODE_SEL = 0, SLEW_RATE = 0

TRANSITION TIME vs. INPUT AMPLITUDE

MAX3798 toc11

INPUT AMPLITUDE (mV

P-P

)

TRANSITION TIME (ps)

1000800600400200

0 1200

MODE_SEL = 0, SLEW_RATE = 0, RXDE_EN = 0

MODE_SEL = 0, SLEW_RATE = 0, RXDE_EN = 1

MODE_SEL = X, SLEW_RATE = 1, RXDE_EN = 1

MODE_SEL = X, SLEW_RATE = 1, RXDE_EN = 0

PATTERN = 00001111,

DATA RATE = 8.5Gbps,

20% TO 80%

LOS THRESHOLD vs. DAC SETTING

MAX3798 toc12

SET_LOS[5:0]

LOS THRESHOLD (mV)

564935 4214 21 287

100

120

140

160

180

063

DEASSERT

ASSERT

SENSITIVITY vs. DATA RATE

MAX3798 toc13

DATA RATE (Gbps)

SENSITIVITY OMA (dBm)

10864

-17

-16

-15

-14

-13

-12

-18

212

USING FINISAR ROSA

MODE_SEL = 1

MODE_SEL = 0

Rx INPUT RETURN LOSS

MAX3798 toc14

FREQUENCY (Hz)

SDD11 (dB)

10G1G

-50

-40

-30

-20

-10

-60

100M 100G

Rx OUTPUT RETURN LOSS

MAX3798 toc15

FREQUENCY (Hz)

SDD22 (dB)

10G1G

-45

-40

-35

-30

-25

-20

-15

-10

-5

-50

100M 100G

CML OUTPUT AMPLITUDE

vs. DAC SETTING

MAX3798 toc16

SET_CML[7:0]

CML OUTPUT AMPLITUDE (mV

P-P

)

25020015010050

200

400

600

800

1000

1200

1400

0 300

Typical Operating Characteristics—Limiting Amplifier (continued)

= 3.3V, T

= +25°C, unless otherwise specified. Figure 1 shows the typical setup used for measurements. Registers are set to

default values unless otherwise noted, and the 3-wire interface is static during measurements. For testing, the MODE_SEL bit was

used and the MSEL pin was left open.)

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 34 35

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