5 kV RMS/3.75 kV RMS, Dual LVDS Gigabit Isolator (First Channel Reversed)

The ADN4654/ADN4655/ADN46561 are signal isolated, low voltage differential signaling (LVDS) buffers that operate at up to 1.1 Gbps with low jitter. The devices integrate Analog Devices, Inc., iCoupler® technology, enhanced for high speed operation to provide galvanic isolation of the TIA/EIA-644-A compliant LVDS drivers and receivers. This integration allows drop-in isolation of an LVDS signal chain.

The ADN4654/ADN4655/ADN4656 comprise multiple channel configurations, and the LVDS receivers on the ADN4655 and ADN4656 include a fail-safe mechanism to ensure a Logic 1 on the corresponding LVDS driver output when the inputs are floating, shorted, or terminated but not driven.

For high speed operation with low jitter, the LVDS and isolator circuits rely on a 2.5 V supply. An integrated on-chip low dropout (LDO) regulator can provide the required 2.5 V from an external 3.3 V power supply. The devices are fully specified over a wide industrial temperature range and come in a 20-lead, wide body SOICW package with 5 kV rms isolation or in a 20-lead SSOP package with 3.75 kV rms isolation.

Applications

* Isolated video and imaging data

* Analog front-end isolation

* Data plane isolation

* Isolated high speed clock and data links

1 Protected by U.S. Patents 5,952,849; 6,873,065; 6,903,578; and 7,075,329. Other patents are pending.

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5 kV rms and 3.75 kV rms LVDS isolators

* Complies with TIA/EIA-644-A LVDS standard

* Multiple dual-channel configurations

* Any data rate up to 1.1 Gbps switching with low jitter

* 4 ns typical propagation delay

* 2.6 ps rms typical random jitter, rms

* 90 ps typical peak-to-peak total jitter at 1.1 Gbps

* 2.5 V or 3.3 V supplies

* −75 dBc power supply ripple rejection, phase spur level

* Glitch immunity

* ±8 kV IEC 61000-4-2 ESD protection across isolation barrier

* High common-mode transient immunity: >25 kV/μs