MAX9273
22-Bit GMSL Serializer with Coax or
STP Cable Drive
10
Maxim Integrated
Typical Operating Characteristics
(VAVDD = VDVDD = VIOVDD = 1.8V, DBL = low, TA = +25NC, unless otherwise noted.)
SUPPLY CURRENT vs.PCLKIN
FREQUENCY (BWS = 0)
MAX9273
toc01
PCLKIN FREQUENCY (MHz)
SUPPLY
CURRENT
(mA)
40 45
35
30
25
20
15
10
40
45
50
55
60
65
70
35
550
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)
52
51
50
49
48
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-100
47
53
fPCLKIN = 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)
15
10
5
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
0
020
SUPPLY CURRENT vs. PCLKIN
FREQUENCY (BWS = 1)
MAX9273
toc02
PCLKIN FREQUENCY (MHz)
SUPPLY
CURRENT
(mA)
35
30
25
20
15
10
40
45
50
55
60
65
70
35
540
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
20
10
5
20
40
60
0
025
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)
21.0
20.5
20.0
19.5
19.0
-80
-70
-60
-50
-40
-30
-20
-10
0
-90
18.5
21.5
fPCLKIN = 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)
8
6
4
2
10
20
30
40
50
60
0
010
MAXIMUM PCLKIN FREQUENCY
vs. ADDITIONAL DIFFERENTIAL CL (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 CL < 4pF
FOR OPTIMUM PE/EQ SETTINGS