1. General description
The TZA3011 is a fully integrated laser driver for optical transmission systems with data
rates up to 3.2 Gbit/s. The TZA3011 incorporates all the necessary control and protection
functions for a laser driver application with very few external components required and low
power dissipation. The dual-loop controls the average monitor current in a programmable
range from 150 µAto1300µA and the extinction ratio in a programmable range from
5 to 15 (linear scale).
The design is made in the Philips BiCMOS RF process and is available in a HBCC32
package or as bare die. The TZA3011A is intended for use in an application with an
AC-coupled laser diode with a 3.3 V laser supply voltage. The TZA3011B is intended for
use in an application with a DC-coupled laser diode for both 3.3 V and 5 V laser supply
voltages.
2. Features
2.1 General
■ A-rate™ from 30 Mbit/s to 3.2 Gbit/s
■ Bias current up to 100 mA
■ Modulation current up to 100 mA
■ Rise and fall times typical 80 ps
■ Jitter below 20 ps (peak-to-peak value)
■ Modulation output voltage up to 2 V dynamic range
■ 1.2 V minimum voltage on the modulation output pin and 0.4 V minimum voltage on
pin BIAS
■ Retiming function via external clock with disable option
■ Pulse width adjustment function with disable option
■ Positive Emitter Coupled Logic (PECL), Low Voltage Positive Emitter Coupled Logic
(LVPECL) and Current-Mode Logic (CML) compatible data and clock inputs
■ Internal common mode voltage available for AC-coupled data and clock inputs and for
single-ended applications
■ 3.3 V supply voltage
■ TZA3011A: AC-coupled laser for 3.3 V laser supply
■ TZA3011B: DC-coupled laser for 3.3 V and 5 V laser supply
TZA3011A; TZA3011B
30 Mbit/s up to 3.2 Gbit/s A-rate laser drivers
Rev. 06 — 20 January 2005 Product data sheet
