Datasheet

MAX3735/MAX3735A
2.7Gbps, Low-Power SFP Laser Drivers
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +2.97V to +3.63V, T
A
= -40°C to +85°C. Typical values at V
CC
= +3.3V, I
BIAS
= 20mA, I
MOD
= 30mA, T
A
= +25°C, unless
otherwise noted.) (Note 1)
PARAMETER SYM B O L CONDITIONS MIN TYP MAX UNITS
AUTOMATIC POWER-CONTROL LOOP
MD Reverse Bias Voltage 18µA ≤ I
MD
≤ 1500µA 1.6 V
MD Average Current Range I
MD
Average current into MD pin 18 1500 µA
I
BIAS
= 1mA
(MAX3735)
-880 +880
I
BIA S
= 1m A
( M AX 3735A)
-110 +110
Average Power-Setting Stability
APC closed loop
(Notes 4, 7)
I
BIA S
= 100m A -650 +650
ppm/°C
Average Power Setting Accuracy
APC Closed Loop
1mA ≤ I
BIAS
≤ 100mA (Note 8)
-16 +16 %
MAX3735 0.8 1 1.23
External resistor to GND
defines the voltage gain;
I
MD
= 18µA, R
PC_MON
=
50kΩ
MAX3735A 0.9 1.1
MD-Current Monitor Gain I
PC_MON
I
MD
= 1.5mA, R
PC_MON
= 600Ω 0.95 1 1.05
A/A
MAX3735 -10 +10
MD-Current Monitor Gain Stability
18µA ≤ I
MD
≤ 1500µA
(Notes 4, 6)
MAX3735A -4 +4
%
LASER MODULATOR
Current into OUT+ pin; R
L
≤ 15Ω, V
OUT+
,
V
OUT-
≥ 0.6V (DC-coupled)
10 60
Modulation On-Current Range I
MOD
Current into OUT+ pin; R
L
≤ 15Ω_, V
OUT+
,
V
OUT-
≥ 2.0V (AC-coupled)
10 85
mA
Modulation Off-Current I
MODOFF
Current into OUT+ pin during TX_FAULT or
TX_DISABLE
100 µA
I
MOD
= 10mA -480 +480
Modulation-Current Stability
(Note 4)
I
MOD
= 60mA -255 +255
ppm/°C
Modulation-Current Absolute
Accuracy
10mA ≤ I
MOD
≤ 60mA (Note 8) -15 +15 %
Modulation-Current Rise Time t
R
20% to 80%, 10mA ≤ I
MOD
≤ 60mA (Note 4) 42 65 ps
Modulation-Current Fall Time t
F
20% to 80%, 10mA ≤ I
MOD
≤ 60mA (Note 4) 50 80 ps
10mA ≤ I
MOD
≤ 60mA at 2.67Gbps
(Notes 4, 9, 10)
18 38
At 1.25Gbps (K28.5 pattern) 11.5
At 622Mbps (Note 9) 18
Deterministic Jitter
At 155Mbps (Note 9) 40
ps
Random Jitter RJ 10mA ≤ I
MOD
≤ 60mA (Note 4) 0.7 1.0 ps
RMS