ADN2891 3.3 V, 3.2 Gbps Limiting Amplifier
The ADN2891 is a high gain, 3.2Gb/s limiting amplifier optimized for use in SONET, Gigabit Ethernet (GbE), and Fibre Channel optical receivers that accept input levels of up to 2.0 V p-p differential and have 4 mV p-p differential input sensitivity. The ADN2891 provides the receiver functions of quantization and loss of signal (LOS) detection. The ADN2891 operates at up to 3.2 Gb/s to support LX4 transceivers. The limiting amplifier also measures average received power based on a direct measurement of the photodiode current with better than 1 dB of accuracy over the entire input range of the receiver. This eliminates the need for external average Rx power detection circuitry in SFF-8472 compliant optical transceivers. The ADN2891 limiting amplifier operates from a single 3.3 V supply, has low power dissipation, and is available in a space saving 3 mm × 3 mm 16-lead lead frame chip scale package (LFCSP).
Features and Benefits- SFP reference design available
- Input sensitivity: 4 mV p-p
- 80 ps rise/fall times
- CML outputs: 700 mV p-p differential
- Rx signal strength indicator (RSSI): SFF-8472 compliant average power measurement
- Programmable LOS detector: 3.5 mV to 35 mV
- 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
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Data Sheets
Order Information
| Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
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| ADN2891ACPZ-500RL7 Production | 16 ld LFCSP (3x3mm, 1.50mm exposed pad) | OTH 500 | -40 to 95C | 0 | 4.05 | Y |
| ADN2891ACPZ-RL Production | 16 ld LFCSP (3x3mm, 1.50mm exposed pad) | REEL 5000 | -40 to 95C | 0 | 4.05 | Y |
| ADN2891ACPZ-RL7 Production | 16 ld LFCSP (3x3mm, 1.50mm exposed pad) | REEL 1500 | -40 to 95C | 0 | 4.05 | Y |
| ADN2891ACPZ-WP Production | 16 ld LFCSP (3x3mm, 1.50mm exposed pad) | REEL 50 | -40 to 95C | 0 | 4.05 | Y |
Evaluation Boards
| Part Number | Description | Price | RoHS |
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| EVAL-ADN2891EBZ | Evaluation Board | 354.2 | Y |
Reference Materials
