ADN2872(RevB) Просмотр технического описания (PDF) - Analog Devices

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ADN2872
(Rev.:RevB)

3.3 V Dual-Loop, 50 Mbps to 3.3 Gbps Laser Diode Driver

Analog Devices 

Data Sheet

ADN2872

OPTICAL WAVEFORMS

VCC = 3.3 V and TA = 25°C, unless otherwise noted. Note that there was no change to PAVCAP and ERCAP values when different data

rates were tested. Figure 18, Figure 19, and Figure 20 show multirate performance using the low cost Fabry Perot (FP) TOSA NEC

NX7315UA; Figure 21 and Figure 22 show dual-loop performance over temperature using the DFB TOSA Sumitomo SLT2486.

(ACQ LIMIT TEST) WAVEFORMS 1000

(ACQ LIMIT TEST) WAVEFORMS 1001

Figure 18. Optical Eye 2.488 Gbps, 65 ps/DIV, PRBS 231 − 1,

PAV = −4.5 dBm, ER = 9 dB, Mask Margin 25%

(ACQ LIMIT TEST) WAVEFORMS 1000

Figure 21. Optical Eye 2.488 Gbps, 65 ps/DIV, PRBS 231 − 1,

PAV = 0 dBm, ER = 9 dB, Mask Margin 22%, TA = 25°C

(ACQ LIMIT TEST) WAVEFORMS 1001

Figure 19. Optical Eye 622 Mbps, 264 ps/DIV, PRBS 231 − 1,

PAV = −4.5 dBm, ER = 9 dB, Mask Margin 50%

(ACQ LIMIT TEST) WAVEFORMS 1000

Figure 22. Optical Eye 2.488 Gbps, 65 ps/DIV, PRBS 231 − 1,

PAV = −0.2 dBm, ER = 8.96 dB, Mask Margin 21%, TA = 85°C

Figure 20. Optical Eye 155 Mbps,1.078 ns/DIV, PRBS 231 − 1,

PAV = −4.5 dBm, ER = 9 dB, Mask Margin 50%

Rev. B | Page 9 of 20

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