MAX3946ETG+T Maxim Integrated Products, MAX3946ETG+T Datasheet - Page 8

• Manufacturer Part Number: MAX3946ETG+T
• Description: IC LASER DVR SFP 11.3GBPS 24TQFN
• Manufacturer: Maxim Integrated Products
• Type: Laser Diode Driverr

Specifications of MAX3946ETG+T

• Data Rate: 11.3Gbps
• Number Of Channels: 1
• Voltage - Supply: 2.85 V ~ 3.63 V
• Current - Supply: 68mA
• Current - Modulation: 80mA
• Current - Bias: 80mA
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 12-WFQFN, Exposed Pad
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

1.0625Gbps to 11.3Gbps, SFP+ Laser Driver
with Laser Impedance Mismatch Tolerance
(V
8
CC
120
100
100
700
600
500
400
300
200
100
______________________________________________________________________________________
80
60
40
20
90
80
70
60
50
0
= +3.3V, T
0
-40
-40
0
SUPPLY CURRENT vs. TEMPERATURE
CURRENT INTO V
-25
-25 -10
(I
MOD
BIAS MONITOR CURRENT
-10
I
BIAS
A
= 40mA
vs. TEMPERATURE
vs. DAC SETTING
200
TEMPERATURE (°C)
= 60mA
TEMPERATURE (°C)
= +25°C, data pattern = 2
BIAS CURRENT
5
5
SET_IBIAS[8:0]
CC
20
20
I
BIAS
, V
P-P
CCT
I
35
35
BIAS
, I
= 10mA
, AND V
BIAS
= 30mA
50
50
400
= 60mA)
CCD
65
65
PINS
80
80
95
95
600
7
- 1 PRBS + 72 zeros + 2
220
210
200
190
180
170
160
150
140
Typical Operating Characteristics (continued)
90
80
70
60
50
40
30
20
10
40
35
30
25
20
15
10
0
(I
-40
0
0
MOD
CURRENT INTO V
PLUS MODULATION AND BIAS CURRENT
I
25Ω LOAD, 20% TO 80%
10Gbps, 11111 00000 PATTERN
TOTAL CURRENT vs. TEMPERATURE
TOTAL
I
TOTAL
MODULATION CURRENT (AT LOAD)
-25 -10
AT LOAD = 40mA
vs. MODULATION CURRENT
(25Ω LOAD) = 45.8 + 1.038 x I
DIFFERENTIAL
20
(5Ω LOAD) = 45.8 + 1.038 x I
R
LOAD
TRANSITION TIME
vs. DAC SETTING
200
TEMPERATURE (°C)
5
= 25Ω
SET_IMOD[8:0]
2.08 x I
1.57 x I
25Ω LOAD
5Ω LOAD
40
CC
I
20
RISE TIME
MOD
FALL TIME
, V
DIFFERENTIAL
R
CCT
LOAD
MOD
MOD
(mA)
35 50
7
P-P
, AND V
60
- 1 PRBS (inverted) +72 ones, unless otherwise noted.)
= 50Ω
400
, I
BIAS
CCD
65
BIAS
80
BIAS
PINS
= 60mA)
80
+
+
95
600
100
75
70
65
60
55
50
45
40
35
30
25
10
40
35
30
25
20
15
10
9
8
7
6
5
4
3
2
1
0
10
10
MODULATION CURRENT DEEMPHASIS
SET_IMOD[8:0] = 230d
TXDE_MD[1:0] = 2d
SET_IMOD[8:0] = 230d
25Ω LOAD, 20% TO 80%
10Gbps, 1111 0000 PATTERN
vs. MANUAL DEEMPHASIS SETTING
vs. DEEMPHASIS SETTING
EYE CROSSING PERCENT
FALL TIME
RISE TIME
TRANSITION TIME
vs. SET_PWCTRL
20
20
SET_PWCTRL[3:0]
SET_TXDE[5:0]
SET_TXDE[5:0]
30
30
40
40