ADUM1402BRWZ - 4-Ch 2/2 Digital Isolator 10Mbps 16-SOIC | Analog Devices
料号： ADUM1402BRWZ ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $8.1 | $8.10 |
| 10 | $7.2 | $72.00 |
| 100 | $5.85 | $585.00 |
| 500 | $5.1 | $2,550.00 |
| 1,000 | $4.45 | $4,450.00 |
ADUM1402BRWZ 概述
A digital isolator is an integrated circuit that transfers logic-level signals between two galvanically isolated voltage domains using a non-galvanic barrier. Unlike optocouplers, which use LED-photodiode pairs to cross the isolation gap, iCoupler devices embed miniature air-core transformers on-chip. This category sits within signal isolation, in the broader interface IC taxonomy, and is foundational to industrial, automotive, and medical systems that must satisfy IEC 60730, IEC 60950, or IEC 62368 safety and creepage requirements.
Key features of the ADUM1402BRWZ include low dynamic power consumption (1.0 mA per channel at 0 Mbps scaling up to 31 mA per channel at 100 Mbps), tight channel-to-channel matching, and an SOIC-16W footprint with 8 mm of creepage - sufficient for 250 Vrms reinforced isolation per UL 1577. The 2/2 directionality places two channels running side-1 to side-2 and two channels running side-2 to side-1, allowing bidirectional UART, SPI, or RS-485-style signaling in a single chip.
Technically, the iCoupler architecture pairs CMOS drivers with on-die transformers wound around a planar air core. Differential signaling across the transformer, with refresh pulses on every DC transition, eliminates LED-aging concerns and produces <2 ns pulse-width distortion at 5 V operation. The monolithic air core gives superior CMTI (>25 kV/µs) compared to optocouplers, which typically achieve only 10-15 kV/µs.
Typical applications include isolated SPI/UART interfaces in PLCs, isolated gate-driver signal paths in motor drives, battery management isolation in EV chargers, and medical-device patient-isolated data acquisition. The wide supply range and translation capability make it equally at home between 3.3 V MCUs and 5 V sensors.
When laying out the PCB, provide at least 8 mm of creepage between the side-1 and side-2 copper pours, place 0.1 µF VDD bypass capacitors within 2 mm of each supply pin, and avoid routing any side-1 trace beneath the side-2 plane. This prevents contamination of the 2500 Vrms barrier by stray flux or contamination.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives, application notes, and practical design guidance not aggregated on the manufacturer datasheet alone - giving the engineer a one-stop sourcing reference for the ADUM1402BRWZ.
直接替换替代料： ADUM1402BRWZ ——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： ADUM1402BRWZ （相同外形与封装尺寸） ——差异在于 MSL Level, Operating Temperature Range, Package.
快速对比工具——选择替代料号进行并排对比：
ADUM1402ARWZ
✅ 直接替换📋 参考替代料（不在目录中）
ADUM1402CRWZ
✅ 直接替换📋 参考替代料（不在目录中）
ADUM1402WTRWZ
✅ 直接替换📋 参考替代料（不在目录中）
ISO7842DWWR
✅ 直接替换📋 参考替代料（不在目录中）
MAX14850ASE+T
✅ 直接替换📋 参考替代料（不在目录中）
ADUM1402BRWZ 规格参数
| Isolation Voltage (rms) | 2500 Vrms |
| Number of Channels | 4 |
| Channel Directionality | 2 forward / 2 reverse (2/2) |
| Maximum Data Rate | 10 Mbps (NRZ) |
| Common-Mode Transient Immunity (CMTI) | 25 kV/µs (min) |
| Supply Voltage Range (each side) | 2.7 V to 5.5 V |
| Supply Current per Channel @ 0 Mbps, 5 V | 1.0 mA (max) |
| Supply Current per Channel @ 10 Mbps, 5 V | 3.5 mA (max) |
| Supply Current per Channel @ 100 Mbps, 5 V | 31 mA (max) |
| 工作温度范围 | -40°C to +105°C |
| 封装 | 16-SOIC (0.295", 7.50 mm width) - SOIC-W |
| Creepage Distance | 8.0 mm |
| 安装类型 | Surface Mount |
| Lead-Free / RoHS Status | Yes / Compliant |
| MSL 等级 | 1 |
| Approbations / Safety | UL 1577, IEC 60747-17 (VDE 0884) |
ADUM1402BRWZ 引脚配置
| 引脚 1 | VDD1 — Supply voltage for side 1 (2.7 V to 5.5 V) |
| 引脚 2 | VIA — Side-1 input channel A (logic input, side-1 to side-2) |
| 引脚 3 | VOA — Side-2 output channel A (logic output, side-1 to side-2) |
| 引脚 4 | VOB — Side-2 output channel B (logic output, side-1 to side-2) |
| 引脚 5 | GND1 — Ground for side 1 |
| 引脚 6 | GND1 — Ground for side 1 |
| 引脚 7 | VIB — Side-1 input channel B (logic input, side-1 to side-2) |
| 引脚 8 | NC — Not connected (per datasheet) |
| 引脚 9 | VDD1 — Supply voltage for side 1 (2.7 V to 5.5 V) |
| 引脚 10 | VDD2 — Supply voltage for side 2 (2.7 V to 5.5 V) |
| 引脚 11 | VOC — Side-1 output channel C (logic output, side-2 to side-1) |
| 引脚 12 | VIC — Side-2 input channel C (logic input, side-2 to side-1) |
| 引脚 13 | GND2 — Ground for side 2 |
| 引脚 14 | GND2 — Ground for side 2 |
| 引脚 15 | VID — Side-2 input channel D (logic input, side-2 to side-1) |
| 引脚 16 | VDD2 — Supply voltage for side 2 (2.7 V to 5.5 V) |
典型应用
ADUM1402BRWZ 适用于 7 应用s: Isolated SPI/UART Interface in PLCs, Isolated Gate-Driver Signal Path in Motor Drives, Battery Management Isolation in EV Chargers, Medical Device Patient-Isolated Data Acquisition, Industrial 4-20 mA Loop Isolation, Solar Inverter Communication Isolation, Isolated I/O in Robotics and CNC.
Isolated SPI/UART Interface in PLCs
The ADUM1402BRWZ provides four channels of galvanic isolation with 2/2 directionality, fitting bidirectional SPI, UART, and I2C-like interfaces between a low-voltage MCU and field-side sensors in programmable logic controllers. At 10 Mbps the device easily carries 1-5 MHz SPI clocks plus MOSI/MISO data lanes, while 2500 Vrms isolation and 8 mm creepage satisfy IEC 61131-2 industrial control safety requirements. The 25 kV/µs CMTI rejects fast transients from relay coils and motor contactors on the same backplane. Design uses the part between MCU-side logic at 3.3 V and field-side drivers at 5 V, eliminating the need for a separate level translator.
推荐
Isolated Gate-Driver Signal Path in Motor Drives
Three-phase motor drives use the ADUM1402BRWZ to isolate low-voltage MCU PWM signals from the high-side gate drivers of IGBT or SiC MOSFET half-bridges. The 4-channel 2/2 configuration carries three PWM signals and one fault-return path across 2500 Vrms of isolation, blocking the high dV/dt (10-50 kV/µs) switching noise that would otherwise couple into control logic. The 25 kV/µs minimum CMTI ensures logic integrity during fast switching events. PCB layout places the device between MCU ground and the floating high-side driver ground, with 8 mm creepage maintained on the SOIC-W pads to satisfy IEC 61800-5-1 drive isolation rules.
推荐
Battery Management Isolation in EV Chargers
EV charging stations and battery management systems use the ADUM1402BRWZ to isolate communication between the high-voltage battery stack (typically 400-800 V) and the low-voltage BMS controller. The 2500 Vrms rating handles the high-voltage domain, while the 2/2 channel directionality supports both transmit and receive paths of an isolated CAN or SPI link between the cell-monitoring ASIC and the master MCU. The 10 Mbps bandwidth comfortably carries 1 Mbps CAN-FD signals with substantial margin. Wide 2.7 V-5.5 V supply range on both sides eliminates level-shifting between 3.3 V microcontrollers and 5 V battery ASICs.
推荐
Medical Device Patient-Isolated Data Acquisition
Patient-connected medical equipment such as ECG, EEG, infusion pumps, and blood-pressure monitors use the ADUM1402BRWZ to provide reinforced isolation between patient-side analog front ends and the host microcontroller. The 2500 Vrms rating and IEC 60747-17 VDE 0884 certification simplify compliance with IEC 60601-1 medical equipment safety standards. The 4-channel capacity allows simultaneous isolation of SPI configuration lines, data-ready flags, and reset signals from a single ADC front-end. Low 1.0 mA per-channel quiescent current supports portable battery-powered designs where energy budget is critical.
推荐
Industrial 4-20 mA Loop Isolation
Process-control loops and 4-20 mA current-loop transmitters use the ADUM1402BRWZ to isolate the field-side 24 V loop from the controller-side ADC and microcontroller. The 2/2 channel directionality supports bidirectional HART communication overlaid on the 4-20 mA signal, with the 10 Mbps bandwidth easily handling HART's 1.2 kbps / 2.2 kbps ASK/FSK modulation. 2500 Vrms isolation protects the controller from ground potential differences and surge events on long field wiring runs. Industrial temperature rating of -40°C to +105°C covers outdoor installation requirements for pipeline, refinery, and remote-site applications.
推荐
Solar Inverter Communication Isolation
Photovoltaic solar inverters use the ADUM1402BRWZ to isolate communication between the high-voltage DC-side power stage and the low-voltage grid-monitoring controller. The device's 4 channels support isolated UART or SPI links to the inverter's MPPT controller, while the 2500 Vrms isolation rating handles the 600-1500 V DC bus typical of residential and commercial string inverters. The wide 2.7 V-5.5 V supply range enables direct connection to both 3.3 V MPSoCs and 5 V power-stage gate drivers, eliminating level shifters and reducing BOM count.
推荐
Isolated I/O in Robotics and CNC
Industrial robots and CNC machines use the ADUM1402BRWZ to isolate 24 V digital I/O signals from the safety-rated motion controller. The 4-channel 2/2 directionality isolates forward command paths (motor on, direction, brake release) and reverse feedback (encoder index, limit switch) in a single SOIC-W footprint. The 25 kV/µs CMTI rejects switching noise from PWM motor drives on the same cable harness. The wide supply range supports both 24 V field-side logic and 3.3 V or 5 V controller logic without additional level translation.
推荐
推荐产品汇总
工程参考数据： ADUM1402BRWZ ——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 | ADUM1402ARWZ | ADUM1402CRWZ | ADUM1402WTRWZ | ISO7842DWWR | MAX14850ASE+T |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Analog Devices (formerly Maxim) |
| Package | 16-SOIC-W (0.295") | 16-SOIC-W (0.295") | 16-SOIC-W (0.295") | 16-SOIC-W (0.295") | 16-SOIC (DW wide body) | 16-SOIC wide body |
| Maximum Data Rate | 10 Mbps | 1 Mbps | 25 Mbps | 10 Mbps | 100 Mbps | 100 Mbps |
| Isolation Voltage | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 5700 Vrms | 2750 Vrms |
| Channel Directionality | 2/2 | 2/2 | 2/2 | 2/2 | 2/2 | 6/0 (6-channel variant) |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.25 V to 5.5 V | 2.5 V to 5.5 V |
| Automotive Grade (AEC-Q100) | No | No | No | Yes | No | No |
关键差异点
- iCoupler monolithic air-core transformer technology （对比 Discrete optocoupler (e.g., 4N25 + 4N35 quad solution))
- Wide 2.7 V-5.5 V supply range on both sides （对比 ISO7842DWWR (2.25 V-5.5 V))
- 2/2 channel directionality in one package （对比 ADUM1400ARWZ (4/0 unidirectional))
设计说明
Maintain at least 8 mm of PCB creepage between the side-1 copper pour (pins 1-9 plus GND1) and side-2 copper pour (pins 10-16 plus GND2). On a 4-layer board with 0.1 mm minimum dielectric spacing, this typically requires that no side-1 trace or via be routed under the side-2 plane, and that the SOIC-W pad-to-pad air gap be free of solder mask bridges. Failure to maintain creepage will reduce the effective isolation voltage below the datasheet 2500 Vrms rating and may fail IEC 60747-17 creepage tests.
Place a 0.1 µF ceramic bypass capacitor within 2 mm of each VDD1 pin (1 and 9) and each VDD2 pin (10 and 16). A bulk 1-10 µF tantalum or ceramic capacitor on each side handles transient load steps during high-speed channel switching. The iCoupler supply current scales linearly with data rate, so a 10 Mbps signal requires approximately 3.5 mA per channel; ensure regulator headroom accounts for all four channels active simultaneously.
Keep trace lengths on the high-speed data channels matched to within 5 mm to minimize channel-to-channel skew. The ADUM1402BRWZ specifies propagation delay matching typically within 2 ns at 5 V, but mismatched PCB traces add 50-100 ps/cm of additional skew. For SPI applications where MISO/MOSI timing is critical, route forward and reverse channels on adjacent layers with matched impedance to keep inter-channel jitter below the system budget.
Do not connect side-1 and side-2 grounds together anywhere on the PCB - the entire purpose of the ADUM1402BRWZ is to maintain galvanic isolation between two ground domains. Also, do not place any decoupling capacitor, ESD diode, or protection device between side-1 and side-2 nets, as this provides a sneak path across the barrier. A common mistake is using a single 4-channel part to share ground between two isolated DC-DC converter returns; this defeats the isolation entirely.
The 16-SOIC-W package has a thermal resistance of approximately 80 °C/W junction-to-ambient, but this rating is not normally limiting because the ADUM1402BRWZ dissipates only 14 mA × 5 V × 4 channels = 280 mW maximum at 10 Mbps on 5 V. Even at 105 °C ambient this gives junction temperature rise of 22 °C, well within the 150 °C junction limit. No thermal management beyond standard PCB copper pours is required for normal operation.
合规信息
ADUM1402BRWZ is UL 1577 certified (2500 Vrms) and VDE 0884 / IEC 60747-17 certified. Standard grade is not AEC-Q100 qualified - choose ADUM1402WTRWZ for automotive.
