3.3 Volt Laser Driver IC for GbE and Fibre Channel to 2.1 Gbps
1.3 DC Characteristics
Table 1-3. DC Characteristics
Min Typ Max Units
Bias current adjust range
Excluding IBIAS and IMOD but with
IBIAS and IMOD set to maximum
Limited by IREF across temperature
Bias current with output disabled
Tx-Dis = HIGH
Maximum bias current limit
TA = +85 °C (adjustable)
Monitor diode reverse bias voltage
Monitor diode current adjustment range
TTL/CMOS input HIGH voltage (enable/
TTL/CMOS input LOW voltage (enable/
CMOS output HIGH voltage (Fail,OCA)
CMOS output LOW voltage (Fail,OCA)
Differential input impedance
Data and clock inputs
2.5 - - kΩ
Common-mode input voltage‘
VCC -1.38 - VCC - VIN(Diff)
Self-biased common mode input voltage Data and clock inputs
Ratio of bias monitoring current, and
Ratio of modulation monitoring current,
and modulation current
Tx_Disable negate time (2)
Tx_Disable assert time (3)
Modulation Off Current (4)
CMPC = 3.8 nF
Measured at pin OUT-,
temperature at 75 °C
VCC = +3.3V ±10%, TA = -40 °C to +85 °C, unless otherwise noted
(1)Condition when pin 19 OCASET is connected to ground.
(2)Time for optical power to reach 90% of its mean level following negation of Tx_Disable.
(3)Time for optical power to reach 10% of its mean level following assertion of Tx_Disable.
(4)Data input voltage (Vpin21 – Vpin22) > 300 mV, ENA (pin 1) connected to VCC, DIS (pin 2) connected to ground. RMODSET = 5.5 kΩ,
resistance to ground at GNDA = 0.35 Ω.
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