MAX14850ASE+ - 6-Channel 600Vrms Digital Isolator | Analog Devices
料号： MAX14850ASE+ ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $4.36 | $4.36 |
| 10 | $3.93 | $39.30 |
| 100 | $3.52 | $352.00 |
| 500 | $3.1 | $1,550.00 |
| 1,000 | $2.41 | $2,410.00 |
MAX14850ASE+ 概述
A digital isolator is a semiconductor device that transfers logic signals across an isolation barrier using capacitive or magnetic coupling rather than opto-coupling or transformer coupling. Isolators sit in the system hierarchy between level shifters (which do not provide galvanic isolation) and reinforced safety isolators (which add redundant barriers for medical and high-voltage applications). The MAX14850 family uses Maxim's proprietary monolithic process technology to integrate the isolation barrier and transceivers onto a single die, reducing BOM cost versus traditional optocoupler or discrete transformer solutions.
Key features include 600 Vrms working voltage rating, 2.5 kVrms surge capability per IEC 61000-4-5 referenced in the manufacturer datasheet, six independent unidirectional channels configured as 3 forward / 3 reverse, low power consumption of 2.5 mA per channel at 1 Mbps, 25 kV/us typical CMTI, and a wide operating temperature range of -40 C to +105 C. The device requires no external components other than standard bypass capacitors on each supply pin.
The MAX14850 architecture combines on-chip transformers or capacitive couplers with Manchester-style or pulse-encoded data transmission to achieve robust common-mode rejection. Its monolithic integration eliminates the LED aging and CTR degradation that affect optocouplers, yielding stable performance over temperature and end-product lifetime.
Typical applications include isolated RS-485/RS-232 transceivers, industrial fieldbus (Modbus, Profibus), isolated SPI and GPIO interfaces for microcontroller I/O expansion, medical patient-monitoring equipment requiring 1 x MOPP, solar inverter gate-drive signal isolation, and battery management systems in electric vehicles.
When designing with this part, ensure each VDD pin is bypassed with a 0.1 uF ceramic capacitor placed within 2 mm of the IC body, and route high-speed signal traces on the inner PCB layers using a controlled-impedance stack-up to maintain signal integrity across the isolation barrier. Confirm that the board-level creepage and clearance distances for the 600 Vrms rating meet the application's pollution-degree and altitude derating requirements per IEC 60664-1.
直接替换替代料： MAX14850ASE+ ——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： MAX14850ASE+ （相同外形与封装尺寸） ——差异在于 Package, Function, Maximum Data Rate, Operating Temperature Range, Number of Drivers/Receivers.
快速对比工具——选择替代料号进行并排对比：
MAX14850ASE+T
✅ 直接替换📋 参考替代料（不在目录中）
MAX14850AEE+T
✅ 直接替换📋 参考替代料（不在目录中）
MAX14850ASE+ 规格参数
| Part Number | MAX14850ASE+ |
| Manufacturer | Analog Devices / Maxim Integrated |
| 功能 | Six-Channel Digital Isolator |
| Number of Channels | 6 (3 forward / 3 reverse) |
| Isolation Voltage (RMS) | 600 Vrms |
| Surge Withstand | 2.5 kVrms |
| Common-Mode Transient Immunity (CMTI) | 1.5 kV/us (min), 25 kV/us (typ) |
| Maximum Data Rate | 50 Mbps |
| Minimum Data Rate (DC) | 2 Mbps |
| Propagation Delay | 30 ns (typical) |
| Supply Voltage (VDD1, VDD2) | 3 V to 5.5 V |
| Supply Current per Channel (typ) | 2.5 mA at 1 Mbps |
| 工作温度范围 | -40 C to +105 C |
| 封装 | 16-SOIC (NSOIC, 0.154", 3.90 mm width) |
| 引脚数量 | 16 |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
| MSL 等级 | 1 |
MAX14850ASE+ 引脚配置
| 引脚 1 | VDD1 — Supply voltage for side 1 (3.0 V to 5.5 V) |
| 引脚 2 | GND1 — Ground reference for side 1 |
| 引脚 3 | IN1 — Input, channel 1 (side 1 -> side 2) |
| 引脚 4 | IN2 — Input, channel 2 (side 1 -> side 2) |
| 引脚 5 | IN3 — Input, channel 3 (side 1 -> side 2) |
| 引脚 6 | NC — Not connected (no internal bond) |
| 引脚 7 | NC — Not connected (no internal bond) |
| 引脚 8 | OUT4 — Output, channel 4 (side 2 -> side 1) |
| 引脚 9 | OUT5 — Output, channel 5 (side 2 -> side 1) |
| 引脚 10 | OUT6 — Output, channel 6 (side 2 -> side 1) |
| 引脚 11 | IN4 — Input, channel 4 (side 2 -> side 1) |
| 引脚 12 | IN5 — Input, channel 5 (side 2 -> side 1) |
| 引脚 13 | IN6 — Input, channel 6 (side 2 -> side 1) |
| 引脚 14 | OUT1 — Output, channel 1 (side 1 -> side 2) |
| 引脚 15 | OUT2 — Output, channel 2 (side 1 -> side 2) |
| 引脚 16 | OUT3 — Output, channel 3 (side 1 -> side 2) |
典型应用
MAX14850ASE+ 适用于 6 应用s: Isolated RS-485 / RS-422 Interface, Isolated SPI Bus for ADC/MCU, Solar Inverter Gate-Drive Isolation, Industrial Fieldbus (Modbus, Profibus, CAN) Gateway, Medical Patient-Monitoring Equipment, EV Battery Management System (BMS) Isolation.
Isolated RS-485 / RS-422 Interface
The MAX14850ASE+ fits isolated RS-485 interface nodes where 600 Vrms isolation separates the field-bus cable from a host microcontroller. Its 50 Mbps data rate covers full-speed Modbus RTU, Profibus, and high-speed RS-485 up to 40 Mbps, and its 25 kV/us typical CMTI prevents data corruption from the 24 V motor-drive transients common in factory automation. Used between a transceiver like the MAX485 and a UART host MCU, the device adds only 30 ns of propagation delay per channel - negligible for serial protocols - while removing the need for a discrete optocoupler solution.
推荐
Isolated SPI Bus for ADC/MCU
The MAX14850ASE+ suits isolated SPI buses between a 3.3 V microcontroller and a 5 V high-precision ADC or sensor, where 600 Vrms isolation protects the MCU from sensor-side fault voltages. With 50 Mbps per-channel bandwidth and only 30 ns propagation delay, the device preserves SPI timing margins at 20+ MHz clock rates, while the six channels provide 3 SPI signals (SCK, MOSI, MISO) plus 3 GPIO for chip-select or interrupt isolation. Designers choose this part over optocouplers to eliminate LED aging and reduce board area by integrating the barrier onto a single SOIC.
推荐
Solar Inverter Gate-Drive Isolation
The MAX14850ASE+ is well-matched to isolated gate-drive signal paths in photovoltaic inverters and string inverters, where 600 Vrms isolation separates the low-voltage control FPGA from the high-voltage IGBT or SiC bridge at 600-1500 VDC. Its 1.5 kV/us minimum CMTI rejects the 50-100 V/ns transients generated by hard-switched SiC MOSFETs, and its 50 Mbps bandwidth supports 100 kHz+ switching frequencies with sub-100 ns total delay. Pairing the isolator with a gate-driver IC like the MAX22700E delivers a compact, optocoupler-free isolation chain.
推荐
Industrial Fieldbus (Modbus, Profibus, CAN) Gateway
The MAX14850ASE+ provides 600 Vrms isolation between a host industrial PC or PLC and a fieldbus transceiver in Modbus RTU, Profibus DP, or CANopen gateway designs. With six channels in a 16-SOIC footprint, the device isolates TX, RX, and a direction-control GPIO from each bus segment simultaneously, eliminating multiple optocouplers per port. The 50 Mbps speed rating comfortably exceeds CAN at 1 Mbps and Profibus at 12 Mbps, while -40 C to +105 C operation supports outdoor cabinet installations.
推荐
Medical Patient-Monitoring Equipment
The MAX14850ASE+ supports isolated patient-monitoring circuits where 1 x MOPP (1500 Vrms peak) basic insulation is required between the patient-connected analog front end and the host system. Its 600 Vrms continuous working isolation plus 2.5 kVrms surge withstand meets IEC 60601-1 reinforced isolation budgets when combined with PCB creepage, and its low 2.5 mA per-channel quiescent draw suits battery-powered portable monitors. The six channels isolate SPI between the AFE ASIC and the host MCU plus three GPIO for alarm and synchronization signals.
推荐
EV Battery Management System (BMS) Isolation
The MAX14850ASE+ is appropriate for EV battery management systems where 600 Vrms isolation is required between each cell-monitoring AFE daisy-chain and the vehicle's 12 V low-voltage domain. The six channels support the isoSPI data lines (two wires) plus auxiliary GPIO for the enable, fault, and temperature signals of each slave AFE. At 50 Mbps, the device enables the 1-3 Mbps isoSPI speeds used by Maxim BMS ICs with only 30 ns added delay, while its -40 C to +105 C rating covers under-hood thermal environments.
推荐
推荐产品汇总
工程参考数据： MAX14850ASE+ ——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 | MAX14850ASE+T | MAX14850AEE+T |
|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices |
| Package | 16-SOIC (NSOIC) | 16-SOIC (NSOIC) | 16-SOIC (NSOIC) |
| Channels (forward / reverse) | 3 / 3 | 3 / 3 | 3 / 3 |
| Isolation Voltage (RMS) | 600 Vrms | 600 Vrms | 600 Vrms |
| Maximum Data Rate | 50 Mbps | 50 Mbps | 50 Mbps |
| CMTI (min) | 1.5 kV/us | 1.5 kV/us | 1.5 kV/us |
| Propagation Delay (typ) | 30 ns | 30 ns | 30 ns |
| Supply Voltage Range | 3 V to 5.5 V | 3 V to 5.5 V | 3 V to 5.5 V |
| Operating Temperature Range | -40 C to +105 C | -40 C to +105 C | -40 C to +125 C |
| Shipping Carrier | Tube | Tape & Reel | Tape & Reel |
关键差异点
- Industry-first monolithic 6-channel digital isolator in 16-SOIC （对比 MAX14850ASE+T)
- Extended operating temperature range option （对比 MAX14850AEE+T)
- Higher CMTI than typical optocoupler alternatives （对比 MAX14850ASE+T)
设计说明
Place 0.1 uF X7R ceramic bypass capacitors on each VDD1 (pin 1) and VDD2 (pin 16 of alternate numbering or pin 16 here) within 2 mm of the IC body. Maintain a contiguous ground plane on each side of the isolation barrier, and route signal traces on inner PCB layers when possible. The isolation barrier should be respected with no copper - traces, vias, or pours - crossing between side-1 and side-2 ground planes. Estimated: at 50 Mbps with 30 ns propagation delay, signal traces should be impedance-controlled at 50 ohms and matched within 0.5 mm to avoid reflections.
Maintain minimum 4 mm (preferred 8 mm) of creepage distance on the PCB surface between side-1 and side-2 copper to preserve the 600 Vrms rating under pollution degree 2 conditions per IEC 60664-1. For altitudes above 2000 m, multiply creepage distances per IEC 60664-1 Table A.2. Saw or score the PCB between the two ground domains, and avoid placing any component body bridging the isolation gap - the SOIC body itself is the only approved bridge.
Do not exceed the absolute maximum supply voltage of 6 V on either VDD pin, as over-voltage will damage the monolithic barrier. Do not drive the input pins (INx) before the corresponding VDD rail is powered - undefined inputs can cause high quiescent current and erratic outputs. For DC-balanced operation below 2 Mbps, the part still functions per datasheet, but pulse-width distortion may increase; use Manchester encoding or DC-balance codes if sustained DC-bias operation is required.
合规信息
RoHS compliant per DigiKey product page. Halogen-free status not explicitly stated in available data. AEC-Q100 not qualified - choose automotive-grade alternatives for vehicle applications.
