ADN2891: 3.3 V 3.2 Gbps, Limiting Amplifier Data Sheet (Rev. B)3/1/2005588 K
Features and Benefits
- Input sensitivity: 4 mV p-p
- 80 ps rise/fall times
- CML outputs: 700 mV p-p differential
- Programmable LOS detector: 3.5 mV to 35 mV
- Rx signal strength indicator (RSSI)
- SFF-8472-compliant average power measurement
- Single-supply operation: 3.3 V
- Low power dissipation: 145 mW
- Available in space-saving 3 mm × 3 mm, 16-lead LFCSP
- Extended temperature range: −40°C to +95°C
- SFP reference design available
The ADN2891 is a 3.2 Gbps limiting amplifier with integrated loss-of-signal (LOS) detection circuitry and a received signal strength indicator (RSSI). This part is optimized for SONET, Gigabit Ethernet (GbE), and Fibre Channel optoelectronic conversion applications. The ADN2891 has a differential input sensitivity of 4 mV p-p and accepts up to a 2.0 V p-p differential input overload voltage. The ADN2891 supports current mode logic (CML) outputs with controlled rise and fall times.
By monitoring the bias current through a photodiode, the on-chip RSSI detector measures the average power received with 2% typical linearity over the entire valid input range of the photodiode. The on-chip RSSI detector facilitates SFF-8472-compliant optical transceivers by eliminating the need for external RSSI detector circuitry.
Additional features include a programmable loss-of-signal (LOS) detector and output squelch.
The ADN2891 is available in a 3 mm × 3 mm, 16-lead LFCSP.
- SFP/SFF/GBIC optical transceivers
- OC-3/OC-12/OC-48, GbE, Fibre Channel (FC) receivers
- 10GBASE-LX4 transceivers
- WDM transponders
Product Lifecycle Not Recommended for New Designs
This designates products ADI does not recommend broadly for new designs.
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Documentation & Resources
SFP Reference Design Kit1/1/20001618 kB
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|Part Number||Material Declaration||Reliability Data||Pin/Package Drawing||CAD Symbols, Footprints & 3D Models|
|ADN2891ACPZ-500RL7||Material Declaration||Reliability Data||16-Lead LFCSP (3mm x 3mm w/ EP)|
|ADN2891ACPZ-RL||Material Declaration||Reliability Data||16-Lead LFCSP (3mm x 3mm w/ EP)|
|ADN2891ACPZ-RL7||Material Declaration||Reliability Data||16-Lead LFCSP (3mm x 3mm w/ EP)|
|ADN2891ACPZ-WP||Material Declaration||Reliability Data||16-Lead LFCSP (3mm x 3mm w/ EP)|
|Wafer Fabrication Data|
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