GENERAL DESCRIPTION
The TZA3041AHL, TZA3041BHL and TZA3041U are fully integrated laser drivers for Gigabit Ethernet/Fibre Channel (1.2 Gbits/s) systems, incorporating the RF path between the data multiplexer and the laser diode. Since the dual loop bias and modulation control circuits are integrated on the IC, the external component count is low. Only decoupling capacitors and adjustment resistors are required.

FEATURES
• 1.2 Gbits/s data input, both Current Mode Logic (CML) and Positive Emitter Coupled Logic (PECL) compatible; maximum 800 mV (p-p)
• Adaptive laser output control with dual loop, stabilizing optical 1 and 0 levels
• Optional external control of laser modulation and biasing currents (non-adaptive)
• Automatic laser shutdown
• Few external components required
• Rise and fall times of 120 ps (typical value)
• Jitter <50 mUI (p-p)
• RF output current sinking capability of 60 mA
• Bias current sinking capability of 90 mA
• Power dissipation of 430 mW (typical value)
• Low cost LQFP32 5 × 5 plastic package
• Single 5 V power supply.

TZA3041AHL
• Laser alarm output for signalling extremely low and high bias current conditions.
TZA3041BHL
• Extra 1.2 Gbits/s loop mode input; both CML and PECL compatible.
TZA3041U
• Bare die version with combined bias alarm and loop mode functionality.

APPLICATIONS
• Gigabit Ethernet/Fibre Channel optical transmission systems
• Gigabit Ethernet/Fibre Channel optical laser modules.