Rainbow Electronics MAX3983 - Manual (Page 7)

MAX3983
Quad Copper-Cable Signal Conditioner
_______________________________________________________________________________________ 7
Typical Operating Characteristics
(V CC = +3.3V, T A = +25 °C, unless otherwise noted.)
TRANSIENT REPSONSE
MAX3983 toc01
V OUT
A = 3dB, TX_PE = 00
B = 6dB, TX_PE = 01 C = 9dB, TX_PE = 10
D = 12dB, TX_PE = 11
A
B
C
D
A
B
C
D
3.125Gbps
K28.7 PATTERN
MEASURED DIRECTLY AT PART
VERTICAL EYE OPENING
vs. CABLE LENGTH
MAX3983 toc02
CABLE LENGTH (m)
VERTICAL EYE OPENING (mV
P-P
)
15 10 5
100
200
300
400
500
600
700
800
900
1000
0
0 20
TX_PE[1,0] = 00
TX_PE[1,0] = 01
TX_PE[1,0] = 10
TX_PE[1,0] = 11
2.5Gbps XAUI CJPAT
24AWG CABLE
CABLE LENGTH (m)
DJ (ps)
15 10 5
50
100
150
200
250
300
350
0
0 20
END-TO-END DETERMINISTIC JITTER
vs. CABLE LENGTH
MAX3983 toc03
2.5Gbps XAUI CJPAT
ALL CHANNELS TRANSMITTING
10in FR4 AT TX_IN
10in FR4 AT RX_OUT
SOURCE DJ = 23ps
A, B
C
E
D
A
B
D
C
A = 24AWG, TX_PE[1,0] = 00
B = 24AWG, TX_PE[1,0] = 01
C = 24AWG, TX_PE[1,0] = 10 D = 24AWG, TX_PE[1,0] = 11
E = 28AWG, TX_PE[1,0] = 11
10m 24AWG UNEQUALIZED CABLE
ASSEMBLY OUTPUT WITHOUT MAX3983
MAX3983 toc04
1500mV P-P
AT TRANSMITTER
3.125Gbps
XAUI CJPAT
CABLE ONLY
60ps/div
10m 24AWG UNEQUALIZED CABLE ASSEMBLY
OUTPUT WITH MAX3983 PREEMPHASIS
MAX3983 toc05
3.125Gbps
XAUI CJPAT PREEMPHASIS,
TX_PE[1, 0] = 10
320mV
P-P
60ps/div
TX_IN INPUT RETURN LOSS
vs. FREQUENCY
MAX3983 toc06
FREQUENCY (GHz)
DIFFERENTIAL S11 (dB)
3.6 3.2 2.4 2.8 0.8 1.2 1.6 2.0 0.4
-45
-40
-35
-30
-25
-20
-15
-10
-5
0
-50
0 4.0
USING AGILENT 8720ES AND ATN MICROWAVE
ATN-4112A S-PARAMETER TEST SET
DE-EMBEDDING SMA CONNECTOR,
COUPLING CAPACITOR, AND 3in TRACE