Analog Devices Inc. ADN4620 & ADN4621 LVDS 2.5Gigabit Isolators
Analog Devices Inc. ADN4620 and ADN4621 Dual-Channel LVDS 2.5Gigabit Isolators are signal isolated, low voltage differential signaling (LVDS) buffers that operate up to 2.5Gbps with very low jitter. The devices integrate Analog Devices Inc. iCoupler® technology, enhanced for high-speed operation. This technology provides drop-in galvanic isolation for LVDS signal chains. The AC coupling and/or level shifting to the LVDS receivers and from the LVDS drivers allows the isolation of other high-speed signals, such as current mode logic (CML).
The ADN4620 and ADN4621 include a refresh mechanism to monitor the input and output states and ensure that the states remain the same in the absence of data transitions (for example, at power-on). For lower power consumption and high-speed operation with low jitter, the isolator circuits rely on 1.8V supplies. 3.3V supplies are used for LVDS receivers to support the full common-mode range with an input voltage range (input common mode plus differential input voltage) of 0V to 2.4V.
The Analog Devices Inc. ADN4620 and/ADN4621 are fully specified over a wide industrial temperature range and are available in a compact SSOP package with 5.3mm creepage (for reinforced insulation at AC mains voltages).
Features
- 3.75kVrms LVDS isolators
- Complies with TIA/EIA-644-A LVDS signal levels
- Dual-channel configuration (ADN4620: 2 + 0, ADN4621: 1 + 1)
- Any data rate up to 2.5Gbps switching with low jitter
- 5Gbps total bandwidth across two channels
- 2.15ns typical propagation delay
- Typical jitter: 0.82ps rms random, 40ps total peak-to-peak
- Lower power 1.8V supplies with 3.3V supplies for I/O
- ±7kV IEC 61000-4-2 ESD protection across the isolation barrier
- High common-mode transient immunity (70kV/μs typical)
- Safety and regulatory approvals (20-lead SSOP package)
- UL (pending): 3750V rms for 1 minute per UL 1577
- CSA Component Acceptance Notice 5A (pending)
- VDE certificate of conformity, reinforced insulation (pending)
- DIN V VDE V 0884-11 (VDE V 0884-11):2017-01
- VIORM = 1500 VPEAK (maximum working insulation voltage)
- Enable or disable refresh (low-speed output correctness check)
- −40°C to +125°C operating temperature range
- Compact SSOP package with 5.3mm creepage
Applications
- Analog front-end isolation
- Data plane isolation
- Isolated high-speed clock and data links
- Multi-gigabit serialization/deserialization (SERDES)
- PCB-to-PCB optical replacement (for example, short reach fiber)
Videos
Functional block Diagrams
Related Development Tool
Analog Devices Inc. EVAL-ADN4620EBZ/EVAL-ADN4621EBZ Evaluation Boards
For evaluation of the ADN4620/ADN4621 LVDS isolators without the need for external components.