ADN465x Series Enables High-Speed LVDS Communication and Isolation in One Package

Currently, society as a whole is undergoing rapid digitization and automation, as exemplified by Industry 4.0, and signal and data transmission technology plays an important role.

Isolating low-voltage differential signals (LVDS), commonly used in digital I/O, ASIC-to-ASIC communications, and video or image communications, requires redesign of traditional interfaces or signal processing using low-speed isolators. had.

Featuring Analog Devices, Inc., iCoupler® digital isolator technology, the ADN465x family provides direct isolation of high speed LVDS signals. This article introduces the following three features of the LVDS isolators ADN4654/55/56:

1. Industry's fastest data rate up to 1.1Gbps
2. High accuracy, low latency, and high robustness

3. Abundant product lineup with selectable signal direction

1. Industry's fastest data rate up to 1.1Gbps

The ADN4654/55/56 integrated the award-winning galvanically isolated iCoupler® digital isolator and LVDS in a single package to enhance safety and reliability while the ADN4650/51 was the fastest in the industry. It achieves a maximum data throughput rate of 1.1Gbps, about twice as fast as /52.

The ADN4654/55/56 enable direct isolation of high-speed LVDS signals, whereas traditionally isolation of LVDS signals has required signal processing using low-speed isolators.

In addition, the ADN4654/55/56 fully integrates the features required for isolating LDVS signals, reducing BOM and manufacturing costs and simplifying designs compared to traditional fiber optic or discrete isolation. increase.

2. High accuracy, low latency, and high robustness

The ADN4654/55/56 can also be used in cutting-edge I/O expansion systems that connect several meters of cables with high-speed signals due to the following high-precision, low-latency performance and robustness.

・Ultra-low jitter of 90 ps (typical value)

・Low propagation delay of 4ns (typical value)

・Full compliance with TIA/EIA‑644‑A standards

Surge protection with reinforced isolation tested at 8kVpk

・Maximum withstand voltage rating of 5 kVrms

The ADN4655 and ADN4656 also include a fail-safe feature to ensure that the corresponding LVDS driver output is a logic 1 when the inputs are floating, shorted, or terminated but not driven. This feature provides a highly reliable design.

3. Extensive product lineup with selectable signal direction and fail-safe function

The ADN4654/ADN4655/ADN4656 support multiple channel configurations, allowing you to choose the best combination of signal directions.

Key Features of the ADN4654/55/56

・5kV rms and 3.75kV rms LVDS isolators
・Compliant with TIA/EIA-644-A LVDS standard
・Multiple dual-channel configurations
Any data rate up to 1.1Gbps switching with low jitter

・Propagation delay of 4ns (typical value)
・2.6ps rms (typical) random jitter, rms
・90 ps (typical) peak-to-peak total jitter at 1.1 Gbps
・Power supply: 2.5V/3.3V
-75dBc power supply ripple rejection, phase spurious level
・Glitch resistance
・±8kV IEC 61000-4-2 ESD protection across isolation barrier
・High common mode transient voltage: >25kV/μs
・1.1Gbps PRBS meets EN 55022 Class B radiated emission limits
・Operating temperature range: −40°C to +125°C
・7.8mm creepage distance and clearance (minimum)

Application example

• medical endoscope
• data center
• Industrial PLC backplane

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