Information as of 2000-01-10
 Latest information online
TZA3031AHL; TZA3031BHL; TZA3031U; SDH/SONET STM1/OC3 laser drivers
| Description |  |
The TZA3031AHL, TZA3031BHL and TZA3031U are fully integrated laser drivers for STM1/OC3 (155 Mbits/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. The TZA3031AHL features an alarm function for signalling extreme bias current conditions. The alarm low and high threshold levels can be adjusted to suit the application using only a resistor or a current Digital-to-Analog Converter (DAC). The TZA3031BHL is provided with an additional RF data input to facilitate remote (loop mode) system testing. The TZA3031U is a bare die version for use in compact laser module designs. The die contains 40 pads and features the combined functionality of the TZA3031AHL and the TZA3031BHL.
| Features | |
- 155 Mbits/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 ONE and ZERO 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 plastic package
- Single 5 V power supply.
TZA3031AHL
- Laser alarm output for signalling extremely low and high bias current conditions.
TZA3031BHL
- Extra STM1 155 Mbits/s loop mode input; both CML and PECL compatible.
TZA3031U
- Bare die version with combined bias alarm and loop mode functionality.
| Applications | |
- SDH/SONET STM1/OC3 optical transmission systems
- SDH/SONET STM1/OC3 optical laser modules.
| Datasheet | |
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TZA3031AHL; TZA3031BHL; TZA3031U links to the similar products page containing an overview of products that are similar in function or related to the part number(s) as listed on this page. The similar products page includes products from the same catalog tree(s) , relevant selection guides and products from the same functional category.
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