IL3522E - 40Mbps Isolated RS422/RS485 Transceiver | NVE
料号： IL3522E ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $8.45 | $8.45 |
| 10 | $7.62 | $76.20 |
| 100 | $6.95 | $695.00 |
| 500 | $6.1 | $3,050.00 |
| 1,000 | $5.4 | $5,400.00 |
IL3522E 概述
An isolated RS-485/RS-422 transceiver is a type of galvanically isolated bus interface IC that combines a differential line driver/receiver with a high-voltage isolation barrier, enabling noise-immune, ground-loop-free data transmission between physically separated subsystems. It belongs to the digital isolator family (galvanic isolator -> signal isolator -> interface IC), which sits above standard non-isolated transceiver ICs but below fiber-optic links in the system-level connectivity hierarchy. NVE's proprietary GMR-based (Giant Magneto-Resistive) isolation technology - leveraging True 8 mm creepage wide-body SOIC packaging - provides a 44000-year barrier life expectancy.
Key specifications include a 20 ns typical propagation delay, 1 ns pulse skew, 5 V single-supply operation (3 V to 5.5 V tolerant), 15 kV bus-side ESD protection, and integrated thermal shutdown protection rated to +85 C ambient. The IL3522E delivers a 2.3 V minimum differential output into a 54 ohm load across the full 4.5 V to 5.5 V supply range, exceeding the RS-422 minimum of 2.0 V and improving noise margin on long or heavily-loaded buses. Certifications include VDE 0884-10 and UL 1577 recognition, with surge withstand ratings of 12.8 kV surge and 1 kVrms working voltage on V-Series variants.
Architecturally, the IL3522E pairs an RS-485/RS-422 transceiver die on the bus side with a separate logic-side die, separated by NVE's GMR isolator and a ceramic/polymer composite barrier. Differential signaling plus the integrated barrier eliminate ground-loop currents that would otherwise couple noisy return paths between systems, while the 50 kV/us typical (30 kV/us minimum) CMTI ensures reliable operation across fast switching events such as IGBT inverter edges or PLC backplane transients.
Typical applications include PROFIBUS, MODBUS, and DMX512 industrial fieldbus links, isolated PLC backplane communications, motor drive encoder feedback, and renewable-energy inverter telemetry. The wide-body 16-pin SOIC footprint and wide 3 V to 5.5 V supply tolerance simplify migration from non-isolated MAX485-style designs to fully isolated nodes.
A key design consideration: use a single 0.1 uF ceramic bypass capacitor within 2 mm of each VDD pin, and select termination resistors that balance the bus - mismatched pull-up/pull-down bias degrades both positive- and negative-edge symmetry at high data rates.
This page synthesizes distributor pricing, GMR-isolation design notes, and a drop-in alternative matrix not consolidated in the NVE datasheet alone, giving procurement and design engineers a single source for selection.
直接替换替代料： IL3522E ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： IL3522E （相同外形与封装尺寸） ——差异在于 Data Rate, Package, Propagation Delay, Supply Voltage.
快速对比工具——选择替代料号进行并排对比：
IL3085E
✅ 直接替换📋 参考替代料（不在目录中）
IL3522E-TR13
✅ 直接替换📋 参考替代料（不在目录中）
ISO3082DWR
✅ 直接替换📋 参考替代料（不在目录中）
ADM2582EBRWZ
✅ 直接替换✓ 有现货
$5.5 / 个
查看数据手册 →Si8605AD-B-IS
✅ 直接替换📋 参考替代料（不在目录中）
IL3522E 规格参数
| 功能 | Isolated RS-422/RS-485 Transceiver |
| 数据速率 | 40 Mbps (max) |
| Number of Drivers | 1 |
| Number of Receivers | 1 |
| Protocol | RS-422, RS-485 |
| Isolation Voltage | 2500 Vrms |
| Common-Mode Transient Immunity (CMTI) | 30 kV/us min (50 kV/us typ) |
| 电源电压 | 3 V to 5.5 V |
| Typical Supply Voltage | 5 V |
| Propagation Delay | 20 ns (typical) |
| Pulse Skew | 1 ns |
| Differential Output (54 ohm load) | 2.3 V minimum |
| Bus-Side ESD Protection | 15 kV |
| Barrier Life | 44,000 years |
| 热关断 | Yes, +85 C protection |
| 工作温度范围 | -40 C to +85 C |
| 封装 | 16-pin wide-body SOIC (True 8 mm creepage) |
| 安装类型 | Surface Mount |
| MSL 等级 | MSL 2 (1 year) |
| Certifications | VDE 0884-10, UL 1577 recognized |
| RoHS 状态 | Compliant |
IL3522E 引脚配置
| 引脚 1 | VDD1 — Logic-side supply voltage (3 V to 5.5 V) |
| 引脚 2 | GND1 — Logic-side ground reference |
| 引脚 3 | R — Receiver input (from isolated bus side) |
| 引脚 4 | RE — Receiver enable (active low) |
| 引脚 5 | DE — Driver enable (active high) |
| 引脚 6 | D — Driver input (logic side) |
| 引脚 7 | RO — Receiver output (logic side) |
| 引脚 8 | NC — Not connected (per datasheet) |
| 引脚 9 | GND1 — Logic-side ground reference (alternate) |
| 引脚 10 | GND2 — Bus-side ground reference |
| 引脚 11 | NC — Not connected (per datasheet) |
| 引脚 12 | Y — Non-inverting driver output / non-inverting receiver input |
| 引脚 13 | Z — Inverting driver output / inverting receiver input |
| 引脚 14 | B — Inverting receiver input (bus side) |
| 引脚 15 | A — Non-inverting receiver input (bus side) |
| 引脚 16 | VDD2 — Bus-side supply voltage (5 V typical) |
典型应用
IL3522E 适用于 7 应用s: Industrial PROFIBUS / MODBUS Isolated Bus, Solar Inverter / Renewable Energy Telemetry, Motor Drive Encoder / Servo Feedback Isolation, PLC / DCS Backplane Communications, Building Automation / HVAC Fieldbus, Medical Equipment Isolated Data Link, DMX512 Stage Lighting Control.
Industrial PROFIBUS / MODBUS Isolated Bus
The IL3522E's 40 Mbps data rate and 30 kV/us minimum CMTI make it a strong fit for PROFIBUS DP (up to 12 Mbps) and MODBUS RTU (1 Mbps typical) isolated links in factory automation. The 2500 Vrms isolation removes ground loops between PLCs, remote I/O modules, and field sensors, while the 15 kV bus-side ESD withstands the repetitive connector-discharge transients typical of cable-replacement events. Place the IL3522E between a host UART and the bus connector, with a single 0.1 uF ceramic bypass within 2 mm of each VDD pin. Compared to non-isolated MAX3485 designs, the IL3522E adds 44,000-year barrier life and integrated thermal shutdown, justifying its premium over bare RS-485 transceivers for harsh industrial deployments.
推荐
Solar Inverter / Renewable Energy Telemetry
The IL3522E delivers galvanically isolated RS-485 telemetry between a high-voltage DC bus and low-voltage control logic in solar inverters, wind converters, and battery energy storage systems (BESS). Its 2500 Vrms continuous isolation and 12.8 kV surge withstand satisfy IEC 62109 creepage and clearance requirements, while the 30 kV/us CMTI rejects fast SiC/GaN inverter switching edges that often exceed 10 kV/us. The 16-pin wide-body SOIC with True 8 mm creepage provides the necessary physical separation for double-insulated designs. The 15 kV bus-side ESD protects against installer-induced discharge when cabling arrays. Designers typically pair the IL3522E with a MODBUS-based battery management IC (BIC) and MCU such as the STM32F407 for closed-loop energy storage control.
推荐
Motor Drive Encoder / Servo Feedback Isolation
Industrial servo systems and variable-frequency motor drives benefit from the IL3522E's differential RS-485 isolation between the encoder / resolver feedback path and the central motion controller. With 20 ns typical propagation delay and 1 ns pulse skew, the IL3522E preserves encoder timing accuracy at high motor RPM, where even sub-microsecond skew can disturb position-control loops. The 30 kV/us minimum CMTI is essential in drives with IGBT inverter stages whose dv/dt events routinely exceed 15 kV/us. Mount the IL3522E on the encoder side of the isolation barrier, with the bus pins connected through a shielded twisted pair back to the drive controller's UART or SPI-to-RS-485 bridge.
推荐
PLC / DCS Backplane Communications
Programmable Logic Controllers (PLCs) and Distributed Control Systems (DCS) commonly use isolated RS-485 backplanes for rack-to-rack I/O communication, where the IL3522E provides 2500 Vrms isolation between 24 V field wiring and 5 V logic rails. The wide 3 V to 5.5 V supply range accommodates both 3.3 V microcontrollers (Arduino-class, ESP32, RP2040) and 5 V PLC backplanes. The 2.3 V minimum differential output into a 54 ohm load ensures reliable signaling across backplane traces up to several meters, including when multiple nodes share the bus through multidrop RS-485 topology. The integrated thermal shutdown protects against backplane shorts during commissioning.
推荐
Building Automation / HVAC Fieldbus
The IL3522E bridges isolated RS-485 runs between HVAC controllers, VAV (Variable Air Volume) actuators, and building automation sensors, where 24 V AC field wiring regularly injects large common-mode transients. With 30 kV/us minimum CMTI and 15 kV bus-side ESD, the IL3522E tolerates the inductive kickback from relay-driven actuators and contactor coils without losing bus integrity. The 16-pin wide-body SOIC package provides 8 mm True creepage meeting IEC 60664 overvoltage category III requirements for building services equipment. Pair the IL3522E with a low-cost UART MCU on the sensor node to deliver a fully isolated BACnet MS-TP or MODBUS RTU field node.
推荐
Medical Equipment Isolated Data Link
Although primarily an industrial part, the IL3522E's 2500 Vrms isolation, low 4 kV HBM ESD, and 44,000-year barrier life make it useful in medical equipment where one circuit must communicate with another across a patient-isolation barrier. Typical applications include isolated RS-485 links between patient-monitoring sensors and the central display unit, or between infusion pump control boards and external nurse-station networks. The VDE 0884-10 certification pathway provides a regulatory starting point for IEC 60601-1 isolation design. For medical designs requiring 5 kV isolation (2 MOPP), upgrade to the ADM2587E, but the IL3522E satisfies 1 MOPP needs in patient-adjacent peripherals.
推荐
DMX512 Stage Lighting Control
DMX512 lighting-control runs at 250 kbps over differential RS-485 wiring, well within the IL3522E's 40 Mbps capability, while the 2500 Vrms isolation and 30 kV/us CMTI protect dimmer-pack logic from the switching noise of triac-controlled stage lighting. The True 8 mm wide-body SOIC gives the creepage needed when DMX cables run alongside dimmer wiring in stage conduits. The 15 kV bus-side ESD withstands the regular hot-plugging of XLR connectors during setup and teardown. Use the IL3522E on each dimmer-pack or fixture controller, then daisy-chain via standard DMX splitters to the lighting console.
推荐
推荐产品汇总
工程参考数据： IL3522E ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | IL3085E | ISO3082DWR | ADM2582EBRWZ | Si8605AD-B-IS |
|---|---|---|---|---|---|
| Brand | NVE Corporation | NVE Corporation | Texas Instruments | Analog Devices | Silicon Labs |
| Package | 16-pin wide-body SOIC (True 8 mm) | 16-pin wide-body SOIC - same | 16-pin wide-body SOIC - same | 16-pin wide-body SOIC (integrated DC-DC) - same | 16-pin wide-body SOIC - same |
| Data Rate | 40 Mbps | 5 Mbps (-87%) | 20 Mbps (-50%) | 25 Mbps (-38%) | 40 Mbps (0%) |
| Isolation Voltage | 2500 Vrms | 2500 Vrms (same) | 2500 Vrms (same) | 2500 Vrms (same) | 2500 Vrms (same) |
| CMTI (min) | 30 kV/us | 30 kV/us (same) | 25 kV/us (-17%) | 25 kV/us (-17%) | 25 kV/us (-17%) |
| Isolation Technology | GMR (NVE) | GMR (NVE) | Capacitive (TI) | iCoupler transformer (ADI) | Capacitive (Silicon Labs) |
| Integrated Isolated DC-DC | No (external supply required) | No | No | Yes (integrated) | No |
| Bus-Side ESD | 15 kV | 15 kV (same) | 4 kV (-73%) | 8 kV (-47%) | 8 kV (-47%) |
| Single-Piece Price (typ) | $8.45 USD | $6.20 USD (-27%) | $6.80 USD (-20%) | $10.95 USD (+30%) | $5.95 USD (-30%) |
关键差异点
- Highest CMTI in its class (30 kV/us min, 50 kV/us typical) （对比 ADM2582EBRWZ)
- Lowest propagation-delay pulse skew (1 ns) （对比 ISO3082DWR)
- GMR-based isolation with 44,000-year barrier life （对比 Si8605AD-B-IS)
- Higher bus-side ESD protection (15 kV) （对比 ADM2582EBRWZ)
设计说明
Provide a clean 5 V (or 3.3 V) supply to both VDD1 (logic side, pin 1) and VDD2 (bus side, pin 16); place a single 0.1 uF low-ESR ceramic bypass capacitor within 2 mm of each VDD pin and a 10 uF bulk on each rail. The IL3522E does NOT include an isolated DC-DC; if your application uses only one supply, add an isolated DC-DC converter (or replace the IL3522E with the ADM2582EBRWZ that has integrated isolated DC-DC). Power sequencing is not required - whichever supply ramps first will be tolerated.
Maintain at least 8 mm of creepage across the wide-body SOIC's barrier by NOT routing any copper traces under the package body. Route the logic-side and bus-side grounds to separate PCB ground islands, joined only at the receiving end of the bus. Keep the bus traces (A, B, Y, Z) matched in length to within 50 ps (~10 mil at 1 ns edge) for reliable 40 Mbps signaling, and add 0603 100 ohm split termination at each end of the bus - reference NVE application note AN-IL100 for the recommended split values.
Estimated: at 5 V supply on both sides, 40 Mbps continuous data, and a fully loaded 54 ohm bus, the IL3522E dissipates roughly 200-250 mW; without airflow this gives a junction rise of about +15 C to +20 C on the 16-pin SOIC with 100 mm^2 of copper pour - acceptable up to +70 C ambient. Above +70 C or in sealed enclosures, increase the copper pour to 200 mm^2 plus thermal vias to an internal plane. The integrated thermal shutdown triggers at the +85 C ambient rating, but thermal shutdown behavior should be considered a fault indicator - persistent operation into shutdown indicates inadequate cooling.
For the highest 40 Mbps data rate, use matched 120-ohm differential impedance routing for the bus traces (A, B) and avoid right-angle bends. Add a 100-ohm differential termination at both ends of the bus (or 54 ohms if the RS-422 load is specified); use 1% tolerance resistors. Place the bus-side bypass capacitor as close as possible to VDD2. For runs longer than 10 m at 40 Mbps, consider lowering edge rates via small (10-22 pF) shunt capacitors across A-B to suppress reflections.
合规信息
RoHS compliant per NVE product page. VDE 0884-10 certified and UL 1577 recognized per NVE datasheet (certification document numbers not specified in the provided data; refer to manufacturer certificate directly). AEC-Q100 is not applicable - the IL3522E is targeted at industrial/renewable/medical-grade applications, not automotive.
