Philips TZA3046 User Manual

The TZA3046 is a transimpedance amplifier with Automatic Gain Control (AGC), designed
to be used in Fiber Channel/Gigabit Ethernet (FC/GE) fiber optic links. It amplifies the
current generated by a photo detector (PIN diode or avalanche photodiode) and converts
it to a differential output voltage. It offers a current mirror of average photo current for
RSSI monitoring to be used in SFF-8472 compliant modules.

The low noise characteristics makes it suitable for FC/GE applications, but also for
FTTx applications.

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Low equivalent input noise current, typically 126 nA (RMS)

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Wide dynamic range, typically 2.5

µ

A to 1.7 mA (p-p)

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Differential transimpedance of 7.5 k

Ω

 (typical)

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Bandwidth from DC to 1050 MHz (typical)

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Differential outputs

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On-chip AGC with possibility of external control

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Single supply voltage 3.3 V, range 2.97 V to 3.6 V

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Bias voltage for PIN diode

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On-chip current mirror of average photo current for RSSI monitoring

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Identical ports available on both sides of die for easy bond layout and RF polarity
selection

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Digital fiber optic receiver modules in telecommunications transmission systems, in
high-speed data networks or in FTTx systems.

This device is sensitive to ElectroStatic Discharge (ESD). Therefore care should be taken
during transport and handling.