Rainbow-electronics MAX3805 User Manual download pdf (Page 4)

MAX3805

10.7Gbps Adaptive Receive Equalizer

4 _______________________________________________________________________________________

EQUALIZER OUTPUT EYE AFTER 30in OF FR-4

(CJTPAT 10.0Gbps LFPD/(HFPD + LFPD) = 0.6)

MAX3805 toc04

20ps/div

65mV/div

EQUALIZER OUTPUT EYE AFTER

24ft OF RG-188/U COAXIAL CABLE,

SINGLE ENDED (2

- 1PRBS AT 10.7Gbps)

MAX3805 toc05

20ps/div

65mV/div

RESIDUAL JITTER vs. AMPLITUDE

MAX3805 toc07

AMPLITUDE (mV

P-P

)

RESIDUAL JITTER (ps)

11001000900800700600500

400 1200

DATA RATE = 9.953Gbps

PATTERN = PRBS 2

-1

RESIDUAL JITTER = DJ + 14.1 x RJ

FR4 = 30in

FR4 = 18in

39126 151821242730

RESIDUAL JITTER

vs. FR-4 PATH LENGTH

MAX3805 toc08

FR-4 PATH LENGTH (in)

RESIDUAL JITTER

RESIDUAL JITTER = DJ + 14.1 x RJ

DATA RATE = 10.7Gbps

PATTERN = PRBS 2

-1

= 400mV

P-P

6 7 8 9 10 11

RESIDUAL JITTER vs. DATA RATE

MAX3805 toc09

DATA RATE (Gbps)

RESIDUAL JITTER (ps)

= 400mV

P-P

PATTERN = 100 1's PRBS 2

-1

100 0's PRBS 2

-1

RESIDUAL JITTER = DJ + 14.1 x RJ

30in FR4

18in FR4

-40 -20 0 20 40 60 80

SUPPLY CURRENT vs. TEMPERATURE

MAX3805 toc06

TEMPERATURE (

SUPPLY CURRENT (mA)

= V

CC1

= V

CC2

= +3.3V

RESIDUAL JITTER

vs. R

LFPD

/(R

HFPD

+ R

LFPD

)

MAX3805 toc10

LFPD

/(R

HFPD

+ R

LFPD

)

RESIDUAL JITTER (ps)

0.80.70.6

0.5 0.9

30in FR4

= 400mV

P-P

PATTERN = CJTPAT

DATA RATE = 10.0Gbps

LFPD

+ R

HFPD

) = 100k

Ω

18in FR4

RESIDUAL JITTER = DJ + 14.1 x RJ

Typical Operating Characteristics (continued)

= 3.3V, V

CC1

= 1.8V, V

CC2

= 1.8V, and T

= +25°C, unless otherwise noted.)

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Rainbow-electronics MAX3805 User Manual Page 4

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