Datasheet

MAX3967A
270Mbps SFP LED Driver
_______________________________________________________________________________________ 3
AC ELECTRICAL CHARACTERISTICS
(Load as specified in Figure 1, unless otherwise noted. V
CC
= +2.97V to +5.5V (at the V
CC
pins), R
MODSET
= 1kΩ, T
A
= -40°C to
+85°C. Input data shaped by 470MHz 4-pole filter, PB1 = PB2 = V
EE
, PB3 = open. Typical values are at V
CC
= +3.3V, TC connected
to TCMIN, T
A
= +25°C.) (Note 4)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
Data Input Range Differential input
500 2400
mV
P-P
Output-Current Edge Speed
20% to 80%, input is a 12.5MHz square wave 300
615
1230
ps
Output-Current Pulse-Width
Correction (PWC)
(Note 5) -90 ps
266Mbps (Note 6) 140
Output-Current Data-Dependent
Jitter
DJ
155Mbps (Note 7) 150 250
ps
P-P
Random Jitter RJ 3
ps
RMS
TX_DISABLE Assert Time t_off
Time from rising edge of TX_DISABLE to
output at 10% of steady state
0.01
0.5 µs
TX_DISABLE Negate Time t_on
Time from rising edge of TX_DISABLE to
output at 90% of steady state
0.01
0.5 µs
Power-On Time t_init
Time from V
CC
> 2.97V to output at 90% of
steady state
0.1 2 ms
Figure 1. MAX3967A Output Test Loads
SWITCHING DIODE
OSCILLOSCOPE
OUT-
L1
OUT+
OUT+
OUT-
AC ELECTRICAL LOADDC ELECTRICAL LOAD
FOR PREBIAS VOLTAGE
DC ELECTRICAL LOAD
(EXCEPT PREBIAS VOLTAGE)
OUT+
OUT-
MAX3967AMAX3967AMAX3967A
V
CC
V
CC
V
LED
1.55V
50Ω
5Ω
50Ω
0.22µF
0.22µF
FERRITE
BEAD
V
CC
V
PREBIAS
Note 4: AC characteristics are guaranteed by design and characterization.
Note 5: PWC = (width
CURRENT ON
- width
CURRENT OFF
) / 2.
Note 6: Test pattern is a K28.5 (0011 1110 1011 0000 0101) transmitted at 266Mbps.
Note 7: Test pattern is equivalent to a 2
13
- 1 PRBS containing 72 consecutive zeros or 72 consecutive ones.