PRODUCT DESCRIPTION

The ADN2820 is a compact, high performance, 3.3 V power supply SiGe transimpedance amplifier (TIA) optimized for 10 Gbps Metro-Access and Ethernet systems. It is a single chip solution for detecting photodiode current with a differential output voltage. The ADN2820 features low input referred noise current and high output transimpedance gain, capable of driving a typical CDR or transceiver directly. A POWMON output is provided for input average power monitoring and alarm generation. Low nominal output offset enables dc output coupling to 3.3 V circuits. The OFFSET control input enables output slice level adjustment for asymmetric input signals. The ADN2820 operates with a 3.3 V power supply and is available in die form.

FEATURES

Technology: high performance SiGe

Bandwidth: 9 GHz

Input noise current density: 1.0 µA

Optical sensitivity: –19.3 dBm

Differential transimpedance: 5000 V/A

Power dissipation: 200 mW

Input current overload: 2.8 mA p-p

Linear input range: 0.15 mA p-p

Output resistance: 50 Ω/side

Output offset adjustment range: 240 mV

Average input power monitor: 1 V/mA

Die size: 0.87 mm × 1.06 mm

APPLICATIONS

10.7 Gbps optical modules

SONET/SDH OC-192/STM-64 and 10 GbE

receivers, transceivers, and transponders