Analog Devices' ADN4650/ADN4651/ADN4652 are signal isolated, low-voltage differential signaling (LVDS) buffers that operate at up to 600 Mbps with very low jitter.
These devices integrate Analog Devices' iCoupler® technology, which is enhanced for high-speed operation, to provide galvanic isolation of the TIA/EIA-644-A compliant LVDS drivers and receivers. This technology allows drop-in isolation of an LVDS signal chain.
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 regulator (LDO) 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 are available in a 20-lead, wide body SOIC package with 5 kVRMS isolation or a 20-lead SSOP package with 3.75 kVRMS isolation.
Multiple channel configurations are offered, and the LVDS receivers on the ADN4651/ADN4652 include a fail-safe mechanism to ensure a Logic1 on the corresponding LVDS driver output when the inputs are floating, shorted, or terminated, but not driven.
| Features |
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- 5 kVRMS/3.75 kVRMS LVDS isolator
- Complies with TIA/EIA-644-A LVDS standard
- Multiple dual-channel configurations
- Up to 600 Mbps switching with low jitter
- 4.5 ns (max.) propagation delay
- 151 ps (max.) peak-to-peak total jitter at 600 Mbps
- 100 ps (max.) pulse skew
- 600 ps (max.) part-to-part skew
- 2.5 V or 3.3 V supplies
- -75 dBc power supply ripple rejection and glitch immunity
- ±8 kV IEC 61000-4-2 ESD protection across isolation barrier
- High common-mode transient immunity: >25 kV/μs
- Passes EN55022 class B radiated emissions limits with 600 Mbps PRBS
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- Safety and regulatory approvals (20-lead SOIC package)
- UL (pending): 5000 VRMS for 1 minute per UL 1577
- CSA component acceptance notice 5A (pending)
- VDE certificate of conformity (pending)
- DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
- VIORM = 424 V peak
- Fail-safe output high for open, short, and terminated input conditions
- Operating temperature range: -40°C to 125°C
- Choice of package and isolation options
- 3.75 kVRMS in highly integrated 20-lead SSOP
- 5 kVRMS in 20-lead SOIC with 7.8 mm creepage/clearance
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| Applications |
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- Analog front-end (AFE) isolation
- Data plane isolation
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- Isolated high-speed clock and data links
- Isolated serial peripheral interface (SPI) over LVDS
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