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AD807-155BR 데이터시트(PDF) 11 Page - Analog Devices |
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AD807-155BR 데이터시트(HTML) 11 Page - Analog Devices |
11 / 12 page AD807 REV. A –11– C12 0.1 1 2 5 6 7 3 4 8 16 15 12 11 10 14 13 9 VEE SDOUT AVCC2 PIN NIN AVCC1 THRADJ AVEE AD807 R10 154 R9 154 R6 100 C7 0.1µF R5 100 R1 100 R2 100 C1 0.1µF C2 0.1µF C3 0.1µF C4 0.1µF C6 0.1µF R4 100 R8 100 R7 100 R3 100 C8 R12 150 R11 150 C5 0.1µF CD 0.1µF C11 0.1 R13 THRADJ C10 0.1 R14 47 R15 47 +5V DATAOUTN DATAOUTP VCC2 CLKOUTN CLKOUTP VCC1 CF1 CF2 J1 J2 J3 J4 SDOUT R16 330 R17 3.9k C13 0.1 C9 10 30pF 30pF C14 0.1 EPITAXX ERM504 1µF 1 2 3 PIN TIA NOTE PIN TIA PIN 4 (CASE) IS CONNECTED TO GROUND NOISE FILTER 0.1µF 120nH Figure 26. AD807 Application with Epitaxx PIN—Transimpedance Amplifier Module The entire circuit was enclosed in a shielded box. Table I sum- marizes results of tests performed using a 223-1 PRN Sequence, and varying the average power at the PIN diode. The circuit acquires and maintains lock with an average input power as low as –39.25 dBm. Table II. AD807—Epitaxx ERM504 PIN TIA 155 Mbps Fiber Optic Receiver Circuit: Output Bit Error Rate & Output Jitter vs. Average Input Power Average Optical Input Power Output Bit Output Jitter (dBm) Error Rate (ps rms) 0 0.0 × 10–10 29 –3 0.0 × 10–10 35 –10 0.0 × 10–10 40 –20 0.0 × 10–10 37 –30 0.0 × 10–10 33 –32 0.0 × 10–10 35 –34 0.0 × 10–10 36 –35 0.0 × 10–10 39 –35.5 0.0 × 10–10 40 –36 0.0 × 10–10 41 –37.0 0.0 × 10–10 42 –37.6 0.5 × 10–10 43 –38.0 4 × 10–6 50 SONET (OC-3)/SDH (STM-1) Fiber Optic Receiver Circuit A light wave receiver circuit for SONET/SDH application at 155 Mbps is shown in Figure 26, with test results given in Table II. The circuit operates from a single +5 V supply, and uses two major components: an Epitaxx ERM504 PIN-TIA module with AGC, and the AD807 IC. A 120 MHz, third order, low-pass Butterworth filter at the out- put of the PIN-TIA module provides adequate bandwidth (70% of the bit rate), and attenuates high frequency (out of band) noise. 250mV 50mV/ DIV –250mV 38.12ns 1ns/DIV 48.12ns Figure 27. Receiver Output (Data) Eye Diagram, 0 dBm Optical Input 250mV 50mV/ DIV –250mV 38.12ns 1ns/DIV 48.12ns Figure 28. Receiver Output (Data) Eye Diagram, –38 dBm Optical Input |
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