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SM9403BM Datasheet(PDF) 7 Page - Nippon Precision Circuits Inc |
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SM9403BM Datasheet(HTML) 7 Page - Nippon Precision Circuits Inc |
7 / 18 page SM9403BM NIPPON PRECISION CIRCUITS—7 DPD Error Signal Detector Characteristics (DPDA/DPDB/DPDC/DPDD → TRP) VCC = 5V ± 5%, GND = 0V, Ta = 0 to 70°C P arameter1 1. The tracking error signal TRE is positive with respect to VREF2 if the (DPDA + DPDC) signal phase difference is leading. The detected phase difference is the difference between the point when one internal comparator output changes (from CMA and CMB both HIGH or both LOW) until the second output changes before the first changes again. The phase difference is conver ted to a voltage and sampled for output. Other signals are held constant in the output stage when a phase difference is detected. Condition Rating Unit min typ m a x D P D A/DPDB/DPDC/DPDD input voltage range VREF2 reference −0.55 – + 1 V D P D A/DPDB/DPDC/DPDD input impedance 1–– M Ω Signal gain relative accuracy Gain relative to DPDA , DPDB, DPDC, DPDD inputs – – ±0.17 d B Equalizer gain 1MHz setting DG2 =LOW 1.2 1.6 2.3 dB DG2 = HIGH 1.8 2.2 2.9 5MHz setting DG2 =LOW 5.5 6.1 6.6 DG2 = HIGH 6.1 6.7 7.2 Equalizer frequency response P eak gain frequency (EQE = HIGH) 3.75 5.0 6.25 MHz −3dB frequency (EQE = LOW) 1 1 2 2 3 3 Equalizer frequency response relative accuracy fpeak, (A + C) vs. (B + D) – – ±1.5 % A C coupling time circuit −3dB frequency Time constant 1 DG2 = LOW 5 6 8 4 109 kHz Time constant 2 DG2 = HIGH 17 24 32 A C coupling time constant relative accuracy −3dB frequency, (A + C) vs. (B + D) – – ±2 % Delay control range See table 4. See table 4. ns Phase difference detector minimum time DG1 = DG2 = LOW 2 – – ns Phase difference detector maximum time DG1 = DG2 = HIGH – – 1 µs Phase difference detector minimu m repeat time Input pulse interval 1 2 0 – – ns Phase difference to voltage conversion coefficient DG1 = DG2 = LOW – See table 5. typ ± 20% mV/ns Phase difference to voltage conversion coefficient change accuracy – See table 8. ±1 d B Phase difference output offset voltage VREF2 reference – – ±0.1 V Phase difference output offset voltage temperature drift VREF2 reference – – ±570 µV/ °C DEFECT signal response time – – 1 µ s DPD enable response time DPE flag – – 2 µs Abnor mal waveform TRP droop characteristic V OUT = V REF2 ± 200mV, VREF2 reference – – 0.1 %/µs TRP output voltage range VREF2 reference −1.25 0 +1.25 V TRP output signal frequency response −3dB frequency 5 0 0 – – k H z |
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