MAX3982 查看數據表（PDF） - Maxim Integrated

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MAX3982

SFP Copper-Cable Preemphasis Driver

Maxim Integrated 

SFP Copper-Cable Preemphasis Driver

Typical Operating Characteristics (continued)

(VCC = +3.3V, TA = +25°C, unless otherwise noted. PRBS7 + 100CID pattern is PRBS 27, 100 zeros, 1010, PRBS 27, 100 ones, 0101.)

15m 24AWG CABLE ASSEMBLY

OUTPUT WITHOUT MAX3982,

4.25Gbps PRBS31

MAX3982 toc17

15m 24AWG CABLE ASSEMBLY

OUTPUT WITH MAX3982

PREEMPHASIS, 4.25Gbps PRBS31

MAX3982 toc18

HOT-PLUG WITH TX_DISABLE LOW

MAX3982 toc19

3.3V

VCC

0V

LOW

TX_DISABLE

tPOR = 27ms

PREEMPHASIS, PE[1,0] = 11, OUTLEV = HIGH

OUT+

10ms/div

30in FR4 OUTPUT

WITHOUT MAX3982,

4.25Gbps CJTPAT

MAX3982 toc20

30in FR4 OUTPUT

WITH MAX3982 PREEMPHASIS,

4.25Gbps CJTPAT

MAX3982 toc21

PREEMPHASIS, PE[1,0] = 10,

OUTLEV = HIGH

DETERMINISTIC JITTER

vs. FR4 LENGTH

1.2

4.25Gbps PRBS7

1.0

DRIVING FR4 AT OUT+ AND

OUT-, NO FR4 AT INPUT

PE[1,0] = 00

0.8

PE[1,0] = 01

0.6

0.4

PE[1,0] = 11 PE[1,0] = 10

0.2

0

0

10

20

30 40 50

FR4 LENGTH (in)

8 _______________________________________________________________________________________

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