ADUM1421ARWZ-RL7 - 4-Ch Digital Isolator 3750Vrms | Analog Devices
Teilenummer: ADUM1421ARWZ-RL7 ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $3.42 | $3,42 |
| 10 | $3.08 | $30,80 |
| 100 | $2.74 | $274,00 |
| 500 | $2.47 | $1.235,00 |
| 1.000 | $2.19 | $2.190,00 |
ADUM1421ARWZ-RL7 Übersicht
Digital isolators are components that transfer digital signals across an isolation barrier, providing galvanic isolation to protect circuits and users from high voltages, ground loops, and noise. They are essential in industrial automation, medical equipment, and communication systems where safety and signal integrity are critical. The ADUM1421ARWZ-RL7 uses iCoupler technology, which combines high-speed CMOS and monolithic air core transformers, offering superior performance compared to optocouplers in terms of speed, power consumption, and reliability.
Key features include a wide supply voltage range of 3.0V to 5.5V, low power consumption (typical 1.8mA per channel at 2Mbps), and a high data rate of 2Mbps. The device also features a 25kV/us common-mode transient immunity, ensuring reliable operation in noisy environments. The 4-channel configuration with a 3/1 channel directionality (three forward, one reverse) makes it suitable for SPI and other serial interfaces.
The ADUM1421ARWZ-RL7 is designed with a propagation delay of 100ns typical and a pulse width distortion of 10ns, ensuring accurate signal transmission. The device is RoHS compliant and lead-free, meeting environmental standards. Its robust design includes thermal shutdown protection and a wide operating temperature range, making it suitable for harsh industrial environments.
Typical applications include industrial fieldbus communication, isolated SPI interfaces, motor control, and power supply monitoring. The device is also used in medical equipment where patient safety requires galvanic isolation. Its low power consumption makes it ideal for battery-powered and energy-efficient designs.
When designing with this isolator, ensure proper PCB layout with adequate creepage and clearance distances to maintain the isolation rating. Bypass capacitors should be placed close to the VDD pins to minimize noise. The device is available in tape and reel packaging with a standard quantity of 1000 units.
Drop-in-Alternativen für ADUM1421ARWZ-RL7 – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
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Alternativen anfordernADUM1421ARWZ-RL7 Technische Daten
| Number of Channels | 4 |
| Isolation Voltage | 3750 Vrms |
| Datenrate | 2 Mbps |
| Common-Mode Transient Immunity | 25 kV/us |
| Supply Voltage Range | 3.0 V to 5.5 V |
| Propagation Delay | 100 ns (typical) |
| Pulse Width Distortion | 10 ns (typical) |
| Channel Directionality | 3 forward, 1 reverse |
| Betriebstemperaturbereich | -40C to +125C |
| Package Type | 20-Lead SOIC-W |
| Montageart | Surface Mount |
| RoHS-Status | Compliant |
| Lead-Free | Yes |
| Technology | iCoupler |
| Power Consumption | 1.8 mA per channel (typical) |
ADUM1421ARWZ-RL7 Pin-Konfiguration
| Pin 1 | VDD1 — Supply voltage for side 1 |
| Pin 2 | GND1 — Ground for side 1 |
| Pin 3 | VIA — Input channel A |
| Pin 4 | VIB — Input channel B |
| Pin 5 | VIC — Input channel C |
| Pin 6 | VOD — Output channel D |
| Pin 7 | GND1 — Ground for side 1 |
| Pin 8 | NC — No connect |
| Pin 9 | NC — No connect |
| Pin 10 | NC — No connect |
| Pin 11 | NC — No connect |
| Pin 12 | NC — No connect |
| Pin 13 | GND2 — Ground for side 2 |
| Pin 14 | VOD — Output channel D |
| Pin 15 | VIC — Input channel C |
| Pin 16 | VIB — Input channel B |
| Pin 17 | VIA — Input channel A |
| Pin 18 | GND2 — Ground for side 2 |
| Pin 19 | VDD2 — Supply voltage for side 2 |
| Pin 20 | NC — No connect |
Typische Anwendungen
ADUM1421ARWZ-RL7 ist geeignet für 6 Anwendungs: Industrial Fieldbus Communication, Isolated SPI Interface, Motor Control, Medical Equipment, Power Supply Monitoring, Communication Systems.
Industrial Fieldbus Communication
The ADUM1421ARWZ-RL7 provides galvanic isolation for industrial fieldbus interfaces such as RS-485 and CAN. Its 3750Vrms isolation and 25kV/us CMTI ensure reliable communication in harsh industrial environments with high voltage transients and ground potential differences. The 2Mbps data rate is sufficient for most fieldbus protocols, and the low power consumption makes it suitable for remote I/O modules. The 3/1 channel configuration allows isolation of data and control signals, improving system robustness.
Empfohlen
Isolated SPI Interface
The ADUM1421ARWZ-RL7 is ideal for isolating SPI buses between microcontrollers and peripheral devices such as ADCs, DACs, and sensors. With 3 forward channels for MOSI, SCLK, and CS, and 1 reverse channel for MISO, it provides complete SPI isolation. The 2Mbps data rate supports standard SPI speeds, and the low propagation delay ensures accurate timing. This application is common in industrial control systems and medical devices where isolation is required for safety and noise immunity.
Empfohlen
Motor Control
In motor control systems, the ADUM1421ARWZ-RL7 isolates the control signals from the power stage, protecting the microcontroller from high voltage transients and noise. The high CMTI of 25kV/us ensures reliable operation in the presence of fast switching transients. The 4-channel configuration can isolate PWM signals, fault signals, and communication lines. The wide operating temperature range of -40C to +125C makes it suitable for industrial motor drives.
Empfohlen
Medical Equipment
The ADUM1421ARWZ-RL7 provides galvanic isolation in medical devices to ensure patient safety and prevent electrical shock. Its 3750Vrms isolation rating meets safety standards for medical equipment. The low power consumption is beneficial for portable devices, and the high CMTI ensures reliable operation in the presence of interference from electrosurgical equipment. Typical applications include patient monitoring, diagnostic devices, and isolated data acquisition systems.
Empfohlen
Power Supply Monitoring
The ADUM1421ARWZ-RL7 is used to isolate monitoring signals in power supply systems, allowing safe measurement of voltages and currents on high-voltage rails. The 4-channel configuration can isolate multiple analog or digital signals, such as voltage sense, current sense, and fault indicators. The high isolation voltage and CMTI ensure accurate monitoring in noisy power environments. The device's low power consumption is advantageous for always-on monitoring circuits.
Empfohlen
Communication Systems
The ADUM1421ARWZ-RL7 provides isolation in communication systems to prevent ground loops and protect sensitive components. It is used in isolated UART, SPI, and I2C interfaces in networking equipment, base stations, and telecommunication systems. The 2Mbps data rate supports standard communication protocols, and the high CMTI ensures reliable data transmission in the presence of electromagnetic interference. The compact SOIC-W package is suitable for space-constrained designs.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für ADUM1421ARWZ-RL7 – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | ADUM1441ARSZ-RL7 | ADUM1401ARWZ | ADUM1411ARWZ | ISO7741DW | Si8641BB-B-IS1 |
|---|---|---|---|---|---|---|
| Package | 20-Lead SOIC-W | 20-Lead SSOP | 16-Lead SOIC-W | 16-Lead SOIC-W | 16-Lead SOIC | 16-Lead SOIC |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Silicon Labs |
| Isolation Voltage | 3750 Vrms | 3750 Vrms | 2500 Vrms | 2500 Vrms | 5000 Vrms | 2500 Vrms |
| Data Rate | 2 Mbps | 150 Mbps | 90 Mbps | 10 Mbps | 100 Mbps | 150 Mbps |
| Number of Channels | 4 | 4 | 4 | 4 | 4 | 4 |
| CMTI | 25 kV/us | 25 kV/us | 25 kV/us | 25 kV/us | 100 kV/us | 35 kV/us |
| Supply Voltage Range | 3.0V to 5.5V | 3.0V to 5.5V | 3.0V to 5.5V | 3.0V to 5.5V | 2.25V to 5.5V | 2.5V to 5.5V |
| Propagation Delay | 100 ns | 13 ns | 50 ns | 100 ns | 10 ns | 10 ns |
Wichtigste Unterscheidungsmerkmale
- Higher isolation voltage than ADUM1401ARWZ (vs. ADUM1401ARWZ)
- Lower power consumption than ISO7741DW (vs. ISO7741DW)
- Wider operating temperature range than Si8641BB-B-IS1 (vs. Si8641BB-B-IS1)
Designhinweise
Ensure proper PCB layout with adequate creepage and clearance distances to maintain the 3750Vrms isolation rating. The SOIC-W package has a minimum creepage of 8mm, so maintain at least this distance between the high-voltage and low-voltage sides. Use a solid ground plane on each side and avoid routing traces across the isolation barrier.
Bypass the VDD1 and VDD2 pins with 0.1uF ceramic capacitors placed as close as possible to the pins. Additionally, use a 10uF bulk capacitor on each supply rail to handle transient currents. The device consumes approximately 1.8mA per channel, so ensure the power supply can provide sufficient current without significant voltage drop.
Do not exceed the absolute maximum supply voltage of 7V on VDD1 or VDD2. Also, ensure that the input signals do not exceed the supply voltage range. When using the device for SPI isolation, verify that the data rate and timing meet the requirements of the SPI slave device. Incorrect channel directionality can cause communication failures.
Compliance-Informationen
RoHS compliant per Analog Devices product page. Lead-free. Not AEC-Q100 qualified.
