Datasheet
MAX9273
22-Bit GMSL Serializer with Coax or
STP Cable Drive
10Maxim Integrated
Typical Operating Characteristics
(V
AVDD
= V
DVDD
= V
IOVDD
= 1.8V, DBL = low, T
A
= +25NC, unless otherwise noted.)
SUPPLY CURRENT vs.PCLKIN
FREQUENCY (BWS = 0)
MAX9273 toc01
PCLKIN FREQUENCY (MHz)
SUPPLY CURRENT (mA)
40 45353025201510
40
45
50
55
60
65
70
35
55
0
PRBS ON,
COAX MODE
PREEMPHASIS =
0x0B TO 0x0F
PREEMPHASIS =
0x01 TO 0x04
PREEMPHASIS = 0x00
OUTPUT POWER SPECTRUM vs. PCLKIN
FREQUENCY (VARIOUS SPREAD)
MAX9273 toc04
PCLKIN FREQUENCY (MHz)
OUTPUT POWER SPECTRUM (dBm)
5251504948
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100
47 53
f
PCLKIN
= 50MHz
0% SPREAD
1%
SPREAD
4% SPREAD
0.5% SPREAD
2% SPREAD
MAXIMUM PCLKIN FREQUENCY
vs. STP CABLE LENGTH (BER ≤ 10
-10
)
MAX9273 toc07
STP CABLE LENGTH (m)
PCLKIN FREQUENCY (MHz)
15105
20
40
60
OPTIMUM PE/EQ
SETTINGS
6dB PE, EQ OFF
NO PE, 10.7dB EQ
NO PE, EQ OFF
BER CAN BE AS LOW AS 10
-12
FOR CABLE LENGTHS LESS THAN 10m
0
02
0
SUPPLY CURRENT vs. PCLKIN
FREQUENCY (BWS = 1)
MAX9273 toc02
PCLKIN FREQUENCY (MHz)
SUPPLY CURRENT (mA)
353025201510
40
45
50
55
60
65
70
35
54
0
PRBS ON,
COAX MODE
PREEMPHASIS =
0x0B TO 0x0F
PREEMPHASIS =
0x01 TO 0x04
PREEMPHASIS = 0x00
SERIAL LINK SWITCHING PATTERN
WITH 6dB PREEMPHASIS (PARALLEL BIT
RATE = 50MHz, 10m STP CABLE)
MAX9273 toc05
50mV/div 200ps/div 1.5Gbps
MAXIMUM PCLKIN FREQUENCY
vs. COAX CABLE LENGTH (BER ≤ 10
-10
)
MAX9273 toc08
COAX CABLE LENGTH (m)
PCLKIN FREQUENCY (MHz)
15 20105
20
40
60
0
02
5
6dB PE, EQ OFF
NO PE, 10.7dB EQ
NO PE, EQ OFF
BER CAN BE AS LOW AS 10
-12
FOR CABLE LENGTHS LESS THAN 10m
OUTPUT POWER SPECTRUM vs. PCLKIN
FREQUENCY (VARIOUS SPREAD)
MAX9273 toc03
PCLKIN FREQUENCY (MHz)
OUTPUT POWER SPECTRUM (dBm)
21.020.520.019.519.0
-80
-70
-60
-50
-40
-30
-20
-10
0
-90
18.5 21.5
f
PCLKIN
= 20MHz
0.5%
SPREAD
1%
SPREAD
2% SPREAD
0%
SPREAD
4% SPREAD
SERIAL LINK SWITCHING PATTERN
WITH 6dB PREEMPHASIS (PARALLEL BIT
RATE = 50MHz, 20m COAX CABLE)
MAX9273 toc06
50mV/div 200ps/div 1.5Gbps
ADDITIONAL DIFFERENTIAL LOAD CAPACITANCE (pF)
PCLKIN FREQUENCY (MHz)
8642
10
20
30
40
50
60
0
01
0
MAXIMUM PCLKIN FREQUENCY
vs. ADDITIONAL DIFFERENTIAL C
L
(BER < 10
-10
)
MAX9273 toc09
6dB PE, EQ OFF
10m STP CABLE
OPTIMUM PE/EQ
SETTINGS
NO PE, 10.7dB EQ
NO PE, EQ OFF
BER CAN BE AS LOW AS 10
-12
FOR C
L
< 4pF
FOR OPTIMUM PE/EQ SETTINGS