2003 Jun 05 3
Philips Semiconductors Product specification
30 Mbits/s up to 1.25 Gbits/s laser drivers TZA3047A; TZA3047B
1 FEATURES
1.1 General
• 30 Mbits/s to 1.25 Gbits/s
• Bias current up to 100 mA
• Modulation current up to 100 mA
• Rise and fall times typical 120 ps
• Jitter below 30 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 modevoltage available for AC-coupled
data and clock inputs and for single-ended applications
• 3.3 V supply voltage
• TZA3047A: AC-coupled laser for 3.3 V laser supply
• TZA3047B: DC-coupled laser for 3.3 V and 5 V laser
supply.
1.2 Control features
• Dual-loop control for constant and accurate optical
average power level and extinction ratio
• Optional average power loop control (up to 1.25 Gbits/s)
• Optional direct setting of modulation and bias currents.
1.3 Protection features
• Alarm function on operating current
• Alarm function on monitor current
• Enable function on bias and modulation currents
• Soft start on bias and modulation currents.
2 APPLICATIONS
• SDH/SONET optical transmission systems.
3 GENERAL DESCRIPTION
The TZA3047 is a fully integrated laser driver for optical
transmission systems with data rates up to 1.25 Gbits/s.
The TZA3047 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 µA to 1300 µA
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
TZA3047A is intended for use in an application with an
AC-coupled laser diode with a 3.3 V laser supply voltage.
The TZA3047B is intended for use in an application with a
DC-coupled laser diode for both 3.3 and 5 V laser supply
voltages.
4 ORDERING INFORMATION
TYPE NUMBER
PACKAGE
NAME DESCRIPTION VERSION
TZA3047AVH HBCC32 plastic thermal enhanced bottom chip carrier; 32 terminals;
body 5 × 5 × 0.65 mm
SOT560-1
TZA3047BVH HBCC32
TZA3047UH − bare die; 2560 × 2510 × 380 µm −
