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VSC7969WD2B Datasheet(PDF) 2 Page - Vitesse Semiconductor Corporation |
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VSC7969WD2B Datasheet(HTML) 2 Page - Vitesse Semiconductor Corporation |
2 / 14 page VITESSE SEMICONDUCTOR CORPORATION Advance Product Information VSC7969 3.125Gb/s Integrated Transimpedance and Limiting Amplifier with Signal Detect Page 2 G52355-0, Rev 2.0 02/09/01 © VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012 Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: prodinfo@vitesse.com Internet: www.vitesse.com Electrical Characteristics Table 1: AC Specifications Symbol Parameter Min Typ Max Units Conditions ∆I PH Input Photocurrent Swing 2.2 mA Peak-to-peak AC current amplitude IPHS-AVG Average Photocurrent Sensitivity 4 µA -23dBm average optical power with a detector responsitivity of 0.8A/W. IPHS-PEAK Peak Input Photocurrent Sensitivity 8 µA -23dBm average optical power with a detector responsitivity of 0.8A/W. ∆V OUT-SE Single-Ended Output Voltage Amplitude 200 250 300 mV Single-ended peak-to-peak measurement, IIN >20µA. ∆V OUT-DIFF Differential Output Voltage Amplitude 400 500 600 mV Differential peak-to-peak measurement, IIN >20µA. tR, tF Rise and Fall Time 60 100 ps At 2.2mAp-p input photocurrent swing. 20% to 80%. ZT (1) Transimpedance Gain 20k 27k 40k Ω Differential measurement ∆Z T (1) Ripple in Passband Transimpedance 1 dB Modulation frequency between FL and BW BW Upper -3dB Bandwidth 2.2 2.5 3.0 GHz Referenced to 10MHz, CPD = 0.6pF FL Lower -3dB Cutoff Frequency 100 kHz Referenced to 10MHz, CPD = 0.6pF with no external components ZO Output Impedance 50 Ω Single-ended PSRR Power Supply Rejection Ratio TBD INOISE Input-Referred rms Noise Current 500 nA 30kHz to 2.5GHz CPD Photodetector Capacitance 0.4 0.6 0.8 pF Bias voltage on detector at 2.0V SDH Signal Detect Hysterisis 1 2 4 dB Electrical measurement on SD pin SDA-OPEN Signal Detect Assertion Level 3 5 9 µA Average photocurrent with SD open. SDD-OPEN Signal Detect Deasseration Level 1.0 2.2 3.0 µA Average photocurrent with SD open. SDA-SHORT Signal Detect Asseration Level 6 10 18 µA Average photocurrent with SD shorted to ground. SDD-SHORT Signal Detect Deasseration Level 2.0 4.4 6.0 µA Average photocurrent with SD shorted to ground. SDHIGH Signal Detect HIGH Logic Level VCCS - 0.3 V SDLOW Signal Detect LOW Logic Level 0.5 0.8 V |
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