ADN2871 Analog Devices, Inc., ADN2871 Datasheet - Page 5

• Manufacturer Part Number: ADN2871
• Description: 3.3 V, 50 Mbps To 4.25 Gbps Single-loop Laser Diode Driver
• Manufacturer: Analog Devices, Inc.

SFP TIMING SPECIFICATIONS
Table 2.
Parameter
ALS Assert Time
ALS Negate Time
Time to Initialize, Including Reset of FAIL
FAIL Assert Time
ALS to Reset Time
1
Guaranteed by design and characterization. Not production tested.
1
1
DATAP–DATAN
Symbol
t_off
t_on
t_init
t_fault
t_reset
DATAN
DATAP
SFP MODULE
0V
Min
V
Figure 5. Recommended SFP Supply
CC
Figure 4. Signal Level Definition
_Tx
Typ
1
0.15
25
Rev. A | Page 5 of 20
SFP HOST BOARD
0.1μF
Max
100
5
0.4
275
5
1μH
V p-p
V
SE
DIFF
Unit
μs
ms
ms
μs
μs
0.1μF
= 2
×
V
SE
Conditions/Comments
Time for the rising edge of ALS (Tx_DISABLE) to when
the bias current falls below 10% of nominal
Time for the falling edge of ALS to when the modulation
current rises above 90% of nominal
From power-on or negation of FAIL using ALS
Time to fault to FAIL on
Time Tx_DISABLE must be held high to reset Tx_FAULT.
10μF
3.3V
ADN2871