In the high-speed data processing and complex control systems of AI servers, signal isolation technology is crucial for ensuring system stability and reliability. Signal isolation amplifiers also serve as key components for safeguarding high- and low-voltage circuits and suppressing noise interference. SunYuan Technology's ISOEC U/A-P-O series signal isolators play a vital role in AI servers due to their outstanding performance. Signal isolators are primarily used for electrical isolation, signal conversion and adaptation, equipment protection, signal amplification and distribution, ensuring signal integrity and equipment safety. These products break ground loops through electrical isolation, preventing common-mode voltage interference, and support signal type conversion (e.g., 4-20mA to 0-10V) and impedance matching to resolve mismatches between signal sources and loads. Additionally, signal isolators suppress transient interference, prevent high-voltage surges, compensate for signal attenuation during long-distance transmission, and isolate a single input signal for distribution to multiple outputs.These features collectively enhance the stability and reliability of AI server systems. This series of signal isolators, featuring capacitive coupling isolation technology, EMC interference resistance, and a single-supply integrated design, serves as the preferred solution for optimizing signal integrity and safety isolation in AI servers. Below are their typical application scenarios and advantages within AI servers.
一、Typical Application Scenarios
1. Power monitoring and fault protection in the 48V intermediate bus or distributed power nodes of AI servers: The ISO EC U/A-P-O series isolators isolate and monitor voltage/current signals, providing real-time feedback to the control unit. For example, when GPU power supply anomalies are detected or when GPU cluster loads undergo sudden changes, the module rapidly transmits alarm signals.Prevent system downtime caused by noise, ensure the continuity of AI training, and avoid misjudgments due to ground loop interference. Supports single-ended input conversion to positive and negative signals, compatible with common differential signal acquisition requirements in servers, such as monitoring ripple voltage in power modules.
Sensor signal isolation and transmission is employed for server cooling systems (such as fan speed and temperature sensors) to prevent sensor ground noise from affecting the motherboard control circuitry. The module's SIP12Pin package is suitable for compact space installations and is compatible with server PCB board-level designs. In industrial-grade AI servers (such as edge computing nodes), its wide temperature drift characteristics (superior to optocoupler isolation) ensure signal linearity in environments ranging from -40°C to 85°C, making it suitable for demanding conditions in server rooms or outdoor settings.
Safety isolation and data integrity in medical AI devices or nuclear power monitoring servers function as safety isolation barriers, preventing high-voltage-side faults from impacting low-voltage-side data acquisition circuits, in compliance with IEC safety standards. AI servers typically integrate multiple high-speed digital and analog signal processing units, such as GPU accelerator cards, sensor interfaces, and communication buses. These units are susceptible to electromagnetic interference (EMI) and common-mode noise during operation, leading to signal distortion or system failure. Block electrical interference paths through physical barriers, effectively suppressing ground loop noise and transient voltage fluctuations to ensure signal transmission purity. For example, in server power management modules, isolators prevent high-frequency switching noise from coupling into sensitive control circuits, enhancing overall immunity to interference.
二、Technical Advantages
1. Resists EMC interference to safeguard data integrity Features SIP12Pin flame-retardant packaging (UL94V-0 standard),Compact in size yet featuring 3000VDC triple isolation protection, it effectively blocks high-frequency noise and ground loop interference within the server, ensuring zero distortion in GPU/CPU monitoring signal transmission. 3000VDC triple isolation design ensures complete electrical isolation between input, output, and auxiliary power sources, preventing damage to sensitive circuits from high-voltage spikes within the server (such as power supply module surges). When using multiple modules simultaneously, only a single or multiple power supplies are required, enhancing system redundancy. Capacitive Isolation Technology Dominates: Compared to magnetic/optical isolation, capacitive coupling isolation technology exhibits lower electromagnetic radiation, enhances EMC immunity by 50%, and improves temperature drift characteristics by 30%. It adapts to the complex electromagnetic environment of AI servers with dense wiring. Offers greater advantages in AI servers: High transmission rates: Supports 150Mbps data rates to meet the high-speed signal transmission requirements of AI servers; Long lifespan and stability: Based on silicon dioxide material, it eliminates light decay issues and extends lifespan by 8-10 years compared to optocouplers. Trend Toward Highly Integrated Design: The ISOEC U/A-P-O Series Signal Isolators integrate an isolator, isolated power supply, isolated amplifier, and signal converter into a single unit, significantly reducing PCB footprint and power supply complexity. They are ideal for high-density applications such as server power supplies.
Calibration-free design，Reduce operational costs with an integrated isolated DC/DC converter power supply supporting 5V/12V/15V/24V single-source power. Eliminates the need for on-site negative power supply equipment, boosting deployment efficiency by 60%. Fixed unit gain configuration eliminates the need for zero and gain adjustments, removing external potentiometers and repetitive calibration steps. This reduces on-site maintenance costs and is particularly suitable for AI cluster deployments requiring rapid setup. Full-range linearity reaches ±0.01% FSR, with accuracy grades spanning 0.01 to 0.2, meeting the stringent signal precision requirements for AI training.
Multifunctional signal conversion for complex scenarios, supporting mutual isolation, amplification, and conversion between signals such as 0-75mV/0-2.5V/0-5V/0-10V/0-±100mV/0-±5V/0-±10V and 0-±20mA/4-20mA. Enables bidirectional isolated signal transmission, achieving seamless single-ended/differential signal conversion and compatibility with various sensor interfaces within the server. differential signals, compatible with various sensor interfaces in servers.
4. Multi-channel intelligent sensor integration supports 1-in&1-out, 1-in&2-out, 2-in&2-out, and 4-in&4-out signal isolation amplification. This enables parallel processing of multiple sensor signals, enhancing data acquisition efficiency for AI servers.
Conclusion
The ISOEC U/A-P-O series signal isolators provide critical electrical safety barriers for AI servers through their high isolation, low power consumption, and multifunctional integration. They not only enhance the system's resistance to interference but also support complex signal processing requirements, making them an ideal choice for improving the reliability and energy efficiency of AI infrastructure.
