J720 single-channel compact electrical-to-fiberoptic converter

Electrical-to-Fiberoptic Converter - J720
  • Compact logic-level optical signal link component
  • Allows transport of logic levels and fast triggers over long distances in high EMI environments
  • Fast optical and electrical rise times
  • Below 12 picoseconds typical RMS link jitter
  • 850 nanometer or 1310 nanometer versions available for ST or FC connectorized fiber
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It has always been difficult to transport fast logic signals long distances over copper conductors. Coaxial or twisted-pair transmission lines introduce attenuation, dispersion, ground loops, and provide an entrance point for external electrical noise. The result can be jitter, pulse width distortion, and ultimately logic errors.

The J720 is a compact signal-powered electrical-to-optical converter.

When used with a J730, the combination can transport logic level or critical timing triggers over kilometer distances in high EMI environments with link jitter typically below 10 picoseconds RMS. The J730 provides a digital logic output with risetime below 750 picoseconds, and a fast analog (180 MHz bandwidth) output is also provided for monitoring link integrity.

The J720 is compatible with the Highland model P400 Digital Delay/Pulse Generator and the company's VME-packaged electrical/optical converter products.

The J720 is also an excellent driver for the T760 dual-channel, 100-volt optical-to-electrical converter.

FUNCTION Single-channel logic-level electrical-to-optical converter
INPUT Nom 0 to +5 volts from 50 ohm source, +5.5 volts maximum
Input impedance 50 Ω nominal
PROPAGATION DELAY 1 ns nominal, 50% electrical to 50% optical levels
OUTPUT 1.5 mW nominal optical power, driven from 5 volt, 50 Ω source
850 or 1310 nm wavelength versions available
See manual section 7
BANDWIDTH 500 MHz min
OPTICAL RISETIME < 300 ps driven by Highland P400 or equivalent
JITTER < 12 ps RMS, J720 + J730 combination
OPERATING TEMPERATURE 0 to 60°C
CALIBRATION INTERVAL Two years
CONNECTORS BNC electrical input jack
ST or FC optical fiber output
PACKAGING Aluminum enclosure
0.75” (19.1 mm) width x 0.62” (15.7 mm) height x 3.35” (85.1 mm) nom

PDF Datasheet: J720 electrical-to-fiberoptic converter

PDF Manual: J720 electrical-to-fiberoptic converter

J720-1: 850 nm single-channel compact electrical-to-fiberoptic converter with ST connectorization

J720-3: 1310 nm single-channel compact electrical-to-fiberoptic converter with ST connectorization

J720-11: 850 nm single-channel compact electrical-to-fiberoptic converter with FC connectorization

J720-13: 1310 nm single-channel compact electrical-to-fiberoptic converter with FC connectorization

J43: 3' BNC to BNC cable

J53: 3' SMB to BNC cable

J53-2: 6" SMB to BNC cable

J59: 3' ST to ST fiberoptic cable (multi mode simplex)

J730 single-channel compact fiberoptic-to-electrical converter

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