ADN2880

3.2 Gbps的速率， 3.3 V ，低噪声，阻放大器 3.2 Gbps, 3.3 V, Low Noise, Transimpedance Amplifier

Product Details

The is a 3.3 V, high gain SiGe transimpedance amplifier TIA. The TIA converts the small signal current of a photo detector into differential voltage output. The ADN2880 features a 315 nA typical input-referred noise, enabling an optical sensitivity of −24.2 dBm 0.85 A/W PIN. With a bandwidth of 2.5 GHz, the ADN2880 allows a data rate operation up to 3.2 Gbps. Typical power dissipation is approximately 70 mW.

To facilitate the assembly in small form factor packages, such as TO-46 headers, the ADN2880 provides an on-chip RC filter 200 Ω, 20 pF and features a 20 kHz low frequency cutoff without using an external capacitor. An on-chip RSSI circuit, which generates a voltage proportional to the average photo-diode current, is also available for power monitoring and assembly alignment.

The ADN2880 is available in die form. With a chip area of 1.2 mm × 0.7 mm, the TIA layout is specifically optimized for TO-Can-based packages.

**Applications**

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3.2 Gbps or below optical receivers

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SONET/GbE/FC optical receivers

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SFF-8472-compliant receivers

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PIN/APD-TIA receive optical subassemblies ROSA

### Features and Benefits

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Bandwidth: 2.5 GHz

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Optical sensitivity: −24.2 dBm

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Differential transimpedance: 4400 V/A

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Power dissipation: 70 mW

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Differential output swing: 260 mV p-p

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Input overload current: 4.3 mA p-p

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On-chip RSSI function

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Low frequency cutoff: 20 kHz

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On-chip PD filter: RF = 200 Ω, CF= 20 pF

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Die size: 0.7 mm x 1.2 mm