ISO7241MDW - 4-Ch 3/1 150Mbps Digital Isolator | TI
MPN： ISO7241MDW ✓ 啟用中ISO7241MDW 概覽
Digital isolators are components that transfer digital signals across an isolation barrier while preventing DC current flow and rejecting common-mode noise. They are essential in systems where safety, noise immunity, or ground potential differences exist between circuit domains. The ISO7241MDW uses a silicon-dioxide (SiO2) isolation barrier, which offers high reliability and long-term stability. It is part of the ISO7240x/ISO7241x/ISO7242x family of quad-channel isolators, which provide various channel configurations and output-enable functions.
Key features of the ISO7241MDW include a low channel-to-channel output skew of 1 ns maximum, low pulse-width distortion (PWD) of 2 ns maximum, and low jitter content of 1 ns typical at 150 Mbps. The device operates over a wide supply voltage range of 3.0 V to 5.5 V on both sides, and it is specified for the industrial temperature range of -40°C to +125°C. The output-enable function allows the outputs to be placed in a high-impedance state, facilitating bus-oriented applications.
The ISO7241MDW is designed for high-speed signal isolation in applications such as industrial fieldbus communication, motor control, power inverters, and isolated SPI/UART interfaces. Its high CMTI ensures reliable operation in noisy environments, and the 2500 Vrms isolation rating meets basic insulation requirements for many industrial standards. The device is RoHS compliant and lead-free, supporting environmentally conscious designs.
When designing with the ISO7241MDW, it is important to provide adequate decoupling capacitors on both supply pins and to ensure proper PCB layout to maintain signal integrity and isolation performance. The device does not require external components for the isolation barrier, simplifying the design. For applications requiring higher isolation or different channel configurations, other members of the ISO724x family can be considered.
直接替換替代品，適用於 ISO7241MDW — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ISO7241MDW （相同外形與佔位） — 差異在於 Data Rate, Number of Channels, Package, Isolation Voltage, CMTI.
ISO7241MDWR
✅ 直接替換📋 參考替代品（不在目錄中）
ISO7241CDW
✅ 直接替換📋 參考替代品（不在目錄中）
ISO7241M
✅ 直接替換📋 參考替代品（不在目錄中）
ISO7240MDW
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ADUM1401ARWZ
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ADuM1401BRWZ
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ISO7241MDW 規格
| Number of Channels | 4 (3 forward, 1 reverse) |
| Isolation Voltage | 2500 Vrms |
| 資料速率 | 150 Mbps |
| Common-Mode Transient Immunity (CMTI) | 25 kV/µs |
| Channel-to-Channel Output Skew | 1 ns max |
| Pulse-Width Distortion (PWD) | 2 ns max |
| Jitter Content | 1 ns typ at 150 Mbps |
| Supply Voltage (VCC1/VCC2) | 3.0 V to 5.5 V |
| 工作溫度範圍 | -40°C to +125°C |
| 封裝 | SOIC-16 (DW) 7.50 mm width |
| 安裝類型 | Surface Mount |
| Isolation Barrier | Silicon Dioxide (SiO2) |
| Output Enable | Yes |
| RoHS 狀態 | Compliant |
| Lead-Free | Yes |
ISO7241MDW 腳位配置
| 腳位 1 | VCC1 — Input side supply voltage (3.0V to 5.5V) |
| 腳位 2 | GND1 — Input side ground |
| 腳位 3 | INA — Input channel A (forward) |
| 腳位 4 | INB — Input channel B (forward) |
| 腳位 5 | INC — Input channel C (forward) |
| 腳位 6 | OUTD — Output channel D (reverse) |
| 腳位 7 | EN — Output enable (active high) |
| 腳位 8 | GND1 — Input side ground |
| 腳位 9 | GND2 — Output side ground |
| 腳位 10 | OUTA — Output channel A (forward) |
| 腳位 11 | OUTB — Output channel B (forward) |
| 腳位 12 | OUTC — Output channel C (forward) |
| 腳位 13 | IND — Input channel D (reverse) |
| 腳位 14 | NC — No connect |
| 腳位 15 | GND2 — Output side ground |
| 腳位 16 | VCC2 — Output side supply voltage (3.0V to 5.5V) |
典型應用
ISO7241MDW 適用於 6 應用s: Industrial Fieldbus Communication, Motor Control and Inverter Drives, Isolated SPI/UART Interfaces, Power Supply and Battery Management, Medical Equipment Isolation, Automotive Electronics.
Industrial Fieldbus Communication
The ISO7241MDW is ideal for industrial fieldbus communication such as PROFIBUS, Modbus, and CAN isolation. Its 150 Mbps data rate and 25 kV/µs CMTI ensure reliable data transfer in noisy factory environments. The 3/1 channel configuration supports bidirectional communication with one reverse channel for acknowledgments. The device's 2500 Vrms isolation protects control electronics from ground loops and voltage transients, enhancing system safety and reliability.
推薦
Motor Control and Inverter Drives
In motor control and inverter drives, the ISO7241MDW provides isolation between the microcontroller and gate driver circuits. Its high CMTI (25 kV/µs) prevents false triggering due to fast switching transients from IGBTs or MOSFETs. The 150 Mbps data rate supports high-frequency PWM signals, while the 3/1 channel configuration allows for three forward control signals and one reverse feedback signal. The wide temperature range (-40°C to +125°C) suits harsh industrial environments.
推薦
Isolated SPI/UART Interfaces
The ISO7241MDW is well-suited for isolating SPI or UART interfaces between microcontrollers and peripheral devices. Its 150 Mbps data rate easily handles SPI clock speeds up to 50 MHz, and the 3/1 channel configuration matches typical SPI (MOSI, SCLK, CS forward; MISO reverse) or UART (TX forward, RX reverse) signal directions. The low pulse-width distortion (2 ns max) ensures accurate data transmission, and the output enable function allows bus sharing in multi-drop configurations.
推薦
Power Supply and Battery Management
In power supply and battery management systems, the ISO7241MDW isolates the control circuitry from high-voltage power stages. It can be used to transmit PWM signals for DC-DC converters or to isolate communication between battery monitoring ICs and the main controller. The 2500 Vrms isolation rating provides protection against voltage spikes, and the high CMTI ensures stable operation in the presence of switching noise. The device's low power consumption is beneficial for battery-powered applications.
推薦
Medical Equipment Isolation
The ISO7241MDW is suitable for medical equipment requiring galvanic isolation for patient safety. Its 2500 Vrms isolation rating meets basic insulation requirements for many medical standards. The device's low jitter and high data rate ensure accurate signal transmission in diagnostic and monitoring equipment. The wide temperature range and high reliability make it suitable for long-term use in medical devices. The SiO2 isolation barrier provides stable performance over time.
推薦
Automotive Electronics
The ISO7241MDW is designed for automotive applications such as electric vehicle battery management, motor control, and in-vehicle networking. Its -40°C to +125°C temperature range meets automotive requirements, and the 2500 Vrms isolation provides protection against high-voltage transients. The high CMTI (25 kV/µs) ensures reliable operation in the presence of electromagnetic interference from motors and ignition systems. The device is AEC-Q100 qualified, making it suitable for automotive-grade designs.
推薦
推薦產品摘要
工程參考資料，適用於 ISO7241MDW — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ISO7241MDWR | ISO7241CDW | ADuM1401ARWZ |
|---|---|---|---|---|
| Package | SOIC-16 (DW) | SOIC-16 (DW) | SOIC-16 (DW) | SOIC-16 (DW) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Number of Channels | 4 (3/1) | 4 (3/1) | 4 (3/1) | 4 (3/1) |
| Isolation Voltage | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms |
| Data Rate | 150 Mbps | 150 Mbps | 150 Mbps | 90 Mbps |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs |
| Failsafe Output State | Low | Low | High | Low |
| Operating Temperature | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C |
主要差異化特點
- Higher data rate than many competitors (對比ADuM1401ARWZ)
- Low pulse-width distortion (對比ADuM1401ARWZ)
- Same-brand drop-in variants (對比ISO7241CDW)
設計說明
For optimal isolation performance, maintain a minimum creepage distance of 8 mm between the input and output sides on the PCB. Place the isolation barrier under the device and avoid routing copper traces across the barrier. Use a solid ground plane on each side, but do not connect the grounds together except through the isolation barrier. This ensures the 2500 Vrms isolation rating is maintained.
Decouple both VCC1 and VCC2 with 0.1 µF ceramic capacitors placed as close to the pins as possible. Additionally, use a 10 µF bulk capacitor on each supply if the power source is far from the device. This helps maintain stable operation and reduces noise coupling. The device draws minimal quiescent current, but transient currents during switching can cause voltage dips if decoupling is inadequate.
For high-speed signals up to 150 Mbps, keep the trace lengths short and matched between channels to minimize skew. Use controlled impedance traces (e.g., 50 ohms) if the traces are longer than 1 inch. Avoid vias on the signal lines if possible, as they add parasitic capacitance and inductance. The low output skew (1 ns max) of the ISO7241MDW helps maintain timing margins, but PCB layout still plays a critical role.
合規資訊
RoHS compliant per TI product page. AEC-Q100 qualification not specified for this part; check TI for automotive-grade variants.
