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製品 (15)
ADM2487EBRWZ-RL7 - Isolated RS-485 Transceiver | Analog Devices
The ADM2487EBRWZ-RL7 from Analog Devices is an isolated RS-485/RS-422 transceiver with integrated transformer driver, designed for high-speed, half-duplex or full-duplex communication on multipoint transmission lines. It provides 2500 Vrms isolation, ±15 kV ESD protection, and supports data rates up to 500 kbps. The device is housed in a 16-lead SOIC (0.295", 7.50mm width) package, suitable for industrial and instrumentation applications where galvanic isolation is required. An isolated RS-485 transceiver is a component that combines a differential line transceiver with galvanic isolation, allowing data communication between systems with different ground potentials. It integrates a digital isolator, a transceiver, and often a transformer driver to provide isolated power. This device belongs to the family of interface ICs, specifically digital isolators and bus transceivers, which are essential in industrial automation, building control, and medical equipment to prevent ground loops and protect against voltage transients. Key features include 2500 Vrms isolation voltage, 500 kbps data rate, 25 kV/µs common-mode transient immunity (CMTI), and ±15 kV ESD protection on the bus pins. The integrated oscillator driver allows the use of an external transformer to generate an isolated power supply, simplifying the design. The device supports both half-duplex and full-duplex configurations, with the transmitter outputs and receiver inputs sharing the same transmission line in half-duplex mode. Technically, the ADM2487E uses Analog Devices' iCoupler technology to provide isolation, which uses chip-scale transformers to couple signals across the isolation barrier. This results in reliable, high-speed data transfer with low power consumption. The device operates from a single 5V supply on the logic side and a 5V supply on the bus side, with a typical quiescent current of 2.5 mA. The bus pins are protected against ESD up to ±15 kV, ensuring robustness in harsh industrial environments. Typical applications include industrial fieldbus networks, building automation, HVAC systems, and isolated data acquisition systems. The device is particularly suited for applications requiring reliable communication over long distances (up to 1200 meters) and in noisy environments where galvanic isolation is critical. When designing with this device, ensure proper PCB layout to minimize parasitic capacitance across the isolation barrier. Use a suitable external transformer with the integrated driver to generate the isolated supply, and place decoupling capacitors close to the power pins. The device is RoHS compliant and available in tape and reel packaging.
ADUM141D1BRWZ-RL7 - Quad Digital Isolator 150Mbps | Analog Devices
The ADUM141D1BRWZ-RL7 is a quad-channel digital isolator from Analog Devices, based on iCoupler technology. It combines high-speed CMOS and monolithic air core transformer technology to provide superior isolation performance compared to optocouplers and other integrated couplers. This device offers 3.75 kV RMS isolation, a data rate of 150 Mbps, and a common-mode transient immunity (CMTI) of 75 kV/µs. It is available in a 16-pin SOIC-W (wide body) package, suitable for surface mount assembly. A digital isolator is a component that provides electrical isolation between two circuits while allowing digital signals to pass across the isolation barrier. It is essential in applications where ground potential differences, noise, or safety requirements demand galvanic isolation. Digital isolators are part of the broader category of interface ICs, which manage signal integrity and communication between different parts of a system. They are commonly used in industrial automation, medical equipment, and communication systems. Key features of the ADUM141D1BRWZ-RL7 include its 3:1 channel configuration (three forward channels and one reverse channel), unidirectional data flow, and support for supply voltages from 1.7V to 5.5V on both sides. The device operates over a temperature range of -40°C to +125°C, making it suitable for harsh environments. It also features fail-safe outputs that transition to a predefined state when input power is absent, ensuring predictable system behavior. Technically, the ADUM141D1BRWZ-RL7 uses iCoupler technology, which employs microscopic transformers to transfer data across the isolation barrier. This approach offers advantages such as higher data rates, lower power consumption, and better reliability compared to optocouplers. The device is designed to meet stringent isolation standards, with a working voltage of 3.75 kV RMS and a CMTI of 75 kV/µs, ensuring robust performance in noisy industrial environments. Typical applications include general-purpose multichannel isolation, SPI/data converter isolation, and industrial field bus isolation. The device is also suitable for medical equipment where patient safety requires galvanic isolation. Its high data rate and low propagation delay make it ideal for high-speed communication interfaces. When designing with this device, ensure proper PCB layout to maintain isolation spacing and minimize parasitic capacitance. The supply pins should be decoupled with 0.1 µF capacitors placed close to the pins. Also, consider the fail-safe output behavior when input power is lost, as it may affect system state.
ADUM141E1WBRQZ - 4-Ch Quad Digital Isolator 150Mbps | Analog Devices
The Analog Devices ADUM141E1WBRQZ is a quad-channel digital isolator based on Analog Devices' proprietary iCoupler technology, delivering 3000 Vrms isolation across 4 channels with a maximum guaranteed data rate of 150 Mbps in a 16-pin QSOP (RQ-16) package. The device combines high-speed CMOS and monolithic air-core transformer technology to provide 4 independent isolation channels in a 3:1 channel direction configuration (3 input/1 output), making it ideal for compact multi-channel isolation designs where board space is constrained. A digital isolator is a semiconductor device that transfers digital signals between two galvanically isolated domains using an internal insulating barrier (in iCoupler parts, this is a polyimamic/transformer-based barrier rather than an LED-photodiode optical link found in optocouplers). Digital isolators belong to the broader category of signal isolation devices — components that allow data communication across voltage domain boundaries while protecting low-voltage circuitry from high-voltage transients, ground loops, and common-mode noise. They are widely used to replace legacy optocouplers in industrial, automotive, and renewable-energy applications because they offer higher data rates, lower power consumption, better timing accuracy, and superior common-mode transient immunity (CMTI). Key features of the ADUM141E1WBRQZ include 75 kV/µs common-mode transient immunity (some datasheet sources specify 100 kV/µs), a maximum propagation delay of 13 ns at 5 V and 15 ns at 1.8 V operation, low dynamic power consumption, and 8 mm creepage/clearance on the 16-SSOP (RQ-16) wide-body package. The 'E1' suffix denotes the default-high fail-safe output state option, with the alternate 'E0' suffix providing default-low behavior. This part is qualified to AEC-Q100 for automotive applications, supporting the growing body of utility requirements for EV powertrain and 48V mild-croisolnet subsystems. Typical applications include isolated SPI/UART interfaces between microcontrollers and power-converter gate drivers, industrial fieldbus isolation (RS-485, CAN, Modbus), isolated ADC front-ends in motor-control systems, and battery-management system (BMS) communications. Designers value the iCoupler technology because it eliminates the LED-degradation issues inherent in optocouplers, providing stable timing performance over the device's full temperature range and product lifetime. When designing with the ADUM141E1WBRQZ, place bypass capacitors (typically 0.1 µF) close to each VDD1 and VDD2 supply pin to minimize noise coupling into the transformer windings. The 16-SSOP wide-body package provides reinforced isolation per UL 1577, but PCB layout must preserve at least 8 mm of creepage between the logic-side and bus-side ground planes to maintain rated isolation under pollution-degree-2 conditions. Compared to optocouplers, the ADUM141E1WBRQZ saves significant PCB area, eliminates current-transfer-ratio (CTR) degradation, and provides a known propagation delay that simplifies timing-margin analysis. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on the manufacturer datasheet — including an AEO-optimized FAQ, cross-brand equivalents sourced from authorized distributor cross-reference data, and a parametric comparison against TI ISO7421/ISO7141, Silicon Labs Si8641, and TI ISO7741 families.
ADUM1441ARWZ-RL7 - 4-Ch Digital Isolator | Analog Devices
The ADUM1441ARWZ-RL7 is a micropower, 4-channel digital isolator from Analog Devices, based on the iCoupler technology. It combines high-speed CMOS and monolithic air core transformer technology to provide outstanding performance characteristics superior to alternatives. This device offers 2500Vrms isolation, 2Mbps data rate, and 25kV/µs common-mode transient immunity (CMTI). It operates over a supply voltage range of 3.0V to 3.6V on both sides (VDD1 and VDD2) and is specified over the industrial temperature range of -40°C to +125°C. The ADUM1441ARWZ-RL7 is available in a 16-lead SOIC-W package, with tape and reel packaging for automated assembly. A digital isolator is a component that provides electrical isolation between two circuits while allowing digital signals to pass across the isolation barrier. It is essential in applications where ground potential differences, noise, or safety requirements necessitate galvanic isolation. Digital isolators are part of the broader category of isolation components, which also includes optocouplers and magnetic isolators. The iCoupler technology used in this device employs chip-scale transformers to transfer data, offering advantages such as higher speed, lower power consumption, and better reliability compared to optocouplers. Key features of the ADUM1441ARWZ-RL7 include its micropower operation, with quiescent current typically in the microamp range, making it suitable for battery-powered and energy-efficient designs. The device has a default high output and 3/1 channel directionality, meaning three channels are configured for forward communication and one for reverse. This configuration is ideal for applications requiring bidirectional isolation with a primary data flow. The 2Mbps data rate supports common serial interfaces such as SPI and UART, while the 25kV/µs CMTI ensures reliable operation in noisy industrial environments. Technically, the ADUM1441ARWZ-RL7 integrates multiple isolation channels in a single package, reducing board space and component count compared to discrete solutions. The iCoupler technology provides precise timing and low propagation delay, which is critical for high-speed data transmission. The device also features a refresh mechanism to maintain output states in the absence of input transitions, ensuring robust operation. The SOIC-W package offers good thermal performance and is compatible with standard PCB assembly processes. Typical applications include industrial fieldbus communication, isolated SPI interfaces, motor control signal isolation, and medical equipment where patient safety requires galvanic isolation. The low power consumption and small footprint make it ideal for portable and space-constrained designs. In industrial settings, the high CMTI and isolation rating protect sensitive electronics from transient voltages and ground loops. When designing with this device, ensure that both supply voltages are within the specified range and that decoupling capacitors are placed close to the VDD1 and VDD2 pins. Proper PCB layout is essential to maintain the isolation barrier's integrity and achieve the specified CMTI performance.
ADUM3160BRWZ-RL7 - USB Digital Isolator 2.5kV | Analog Devices
The ADUM3160BRWZ-RL7 is a USB port isolator from Analog Devices, based on iCoupler technology. It provides galvanic isolation for USB signals, supporting both low-speed (1.5 Mbps) and full-speed (12 Mbps) data rates. The device is housed in a 16-lead SOIC-W package with a wide body (7.50 mm width) and is rated for 2500 Vrms isolation voltage. It features a common-mode transient immunity (CMTI) of 25 kV/µs, ensuring robust operation in noisy industrial environments. A USB digital isolator is a component that provides electrical isolation between the USB controller and the USB connector, protecting the host from ground potential differences and electrical noise. It is part of the broader category of digital isolators, which use capacitive or magnetic coupling to transfer digital signals across an isolation barrier without a direct electrical connection. The ADUM3160 specifically uses monolithic air core transformers, a hallmark of iCoupler technology, to achieve high-speed data transfer with low power consumption. Key features of the ADUM3160BRWZ-RL7 include its 2.5 kVrms isolation rating, 12 Mbps full-speed USB support, and 25 kV/µs CMTI. The device operates from a 3.3 V supply on both sides of the isolation barrier, with a typical quiescent current of 5 mA. It is designed to be compliant with USB 2.0 specifications for low and full speed, making it suitable for isolated USB interfaces in medical, industrial, and instrumentation applications. Technically, the ADUM3160 integrates a USB transceiver with an isolation barrier, allowing the D+ and D- lines to be isolated while maintaining signal integrity. The device uses a proprietary encoding scheme to transmit data across the isolation barrier, ensuring reliable communication even with high common-mode noise. The SOIC-W package provides excellent thermal performance and is suitable for automated assembly. Typical applications include isolated USB hubs, medical device interfaces, industrial control systems, and data acquisition systems where ground loop isolation is critical. The ADUM3160BRWZ-RL7 is particularly well-suited for applications requiring full-speed USB data transfer with high isolation voltage. When designing with this device, ensure that the supply voltages on both sides are within the specified range (3.0V to 3.6V) and that proper decoupling capacitors are placed close to the VDD pins. The device does not require external components for the isolation barrier, simplifying the design.
ADUM5402ARWZ - Quad-Channel Digital Isolator with isoPower | Analog Devices
The ADUM5402ARWZ is a quad-channel digital isolator with integrated isoPower DC-to-DC converter from Analog Devices. It provides 2.5 kVrms isolation and supports data rates up to 1 Mbps, with a common-mode transient immunity (CMTI) of 25 kV/µs. The device is housed in a 16-lead SOIC (0.295", 7.50mm width) package and operates over the industrial temperature range of -40°C to +105°C. Digital isolators are components that transfer digital signals across an isolation barrier without a direct electrical connection, using capacitive or magnetic coupling. They are essential in applications requiring galvanic isolation for safety, noise immunity, or ground potential differences. The ADUM5402 belongs to the family of isolated interface ICs, which combine signal isolation with power transfer, enabling complete isolation of a subsystem without separate isolated power supplies. Key features of the ADUM5402ARWZ include four independent isolation channels, an integrated DC-to-DC converter delivering up to 500 mW of regulated output power, and a wide supply voltage range of 3.0V to 5.5V on the primary side. The device uses Analog Devices' iCoupler technology, which provides superior performance compared to optocouplers, including higher data rates, lower power consumption, and better reliability. The ADUM5402ARWZ is designed for applications requiring isolated power and data transfer, such as industrial field buses, isolated SPI/UART interfaces, and isolated sensor data acquisition. Its integrated DC-to-DC converter eliminates the need for a separate isolated power supply, simplifying board design and reducing component count. The device also features a soft-start function to limit inrush current during power-up. Typical applications include isolated RS-485/RS-232 interfaces, isolated power supplies for data converters, and isolated communication in motor drives and power inverters. The ADUM5402ARWZ is also suitable for medical equipment requiring patient isolation, where its 2.5 kVrms isolation rating meets safety standards. When designing with the ADUM5402ARWZ, it is important to ensure proper PCB layout to maintain isolation spacing and to place decoupling capacitors close to the power pins. The integrated DC-to-DC converter requires careful attention to the output capacitor selection to ensure stable operation.
ADUM5402ARWZ-RL7 - Quad-Channel Digital Isolator with isoPower | Analog Devices
The ADUM5402ARWZ-RL7 is a quad-channel digital isolator with integrated, isolated DC-to-DC converter (isoPower) from Analog Devices. It provides 2.5 kVrms isolation, four unidirectional channels, and a data rate of 1 Mbps. The device operates from a 3.0V to 5.5V supply and delivers up to 500 mW of regulated, isolated power. Housed in a 16-lead SOIC-W (wide body) package, it is designed for space-constrained applications requiring signal and power isolation in a single package. Digital isolators are components that transfer digital signals across an isolation barrier while preventing DC and unwanted AC currents from flowing between two circuits. They are essential in applications where safety, ground loop elimination, or noise immunity is required. The ADUM5402 belongs to the family of digital isolators, which are part of the broader category of interface ICs. Its integrated isoPower technology sets it apart by providing isolated power, eliminating the need for a separate isolated DC-DC converter. Key features include 2.5 kVrms isolation voltage, 25 kV/µs common-mode transient immunity (CMTI), and a data rate of 1 Mbps. The integrated DC-to-DC converter provides up to 500 mW of regulated output power, which can be used to power isolated side circuitry. The device supports a wide supply range of 3.0V to 5.5V and has a typical quiescent current of 2.3 mA per channel. It is RoHS compliant and operates over the industrial temperature range of -40°C to +105°C. Technically, the ADUM5402 uses Analog Devices' iCoupler technology, which employs chip-scale transformers for isolation rather than optocouplers. This results in higher reliability, better timing accuracy, and lower power consumption. The integrated isoPower converter uses a push-pull architecture to generate isolated power, providing a regulated output that can be used to power external components. The device also features an enable pin for power management and thermal shutdown protection. Typical applications include industrial field bus isolation, isolated SPI/UART interfaces, power supply control, and data acquisition systems. The ADUM5402 is particularly suited for applications where both signal and power isolation are needed, such as in motor drives, PLCs, and medical equipment. Its compact SOIC-16 package and integrated power make it an ideal choice for space-limited designs. When designing with this device, ensure proper PCB layout with adequate creepage and clearance distances for the isolation barrier. The integrated DC-DC converter requires external capacitors for stability and filtering. Also, consider the total power budget, as the 500 mW output is shared between the isolated side and the converter's own losses.
ADUM5411ARWZ-RL7 - 4-Ch Isolator w/ DC-DC | Analog Devices
The ADUM5411ARWZ-RL7 is a quad-channel digital isolator with an integrated, isolated DC-to-DC converter, manufactured by Analog Devices. It is part of the ADuM5410/ADuM5411/ADuM5412 family, which utilizes iCoupler technology to provide regulated, isolated power adjustable between 3.15 V and 5.25 V. This device eliminates the need for a separate, isolated DC-to-DC converter in low-power applications, simplifying design and reducing board space. The ADUM5411ARWZ-RL7 is offered in a 24-lead SOIC-W package and is available in tape and reel packaging. Digital isolators are components that transfer digital signals across an isolation barrier while preventing unwanted DC and noise from passing. They are essential in applications requiring galvanic isolation for safety, noise immunity, or ground loop elimination. The ADUM5411 integrates the isolation barrier and power conversion, making it a complete solution for isolated data and power transfer. This integration is part of the broader category of interface ICs, specifically digital isolators, which are critical in industrial, medical, and communication systems. Key features of the ADUM5411ARWZ-RL7 include a data rate of 150 Mbps, a common-mode transient immunity (CMTI) of 75 kV/µs, and an isolation voltage rating of 2500 Vrms. The integrated DC-to-DC converter provides up to 500 mW of isolated output power, with an adjustable output voltage from 3.15 V to 5.25 V. The device operates over a wide temperature range of -40°C to +125°C, making it suitable for harsh environments. It also features low propagation delay and high noise immunity, ensuring reliable signal integrity. Technically, the ADUM5411 uses Analog Devices' iCoupler technology, which employs chip-scale transformers to achieve isolation. This technology offers advantages over optocouplers, including higher data rates, lower power consumption, and better reliability. The integrated DC-to-DC converter uses a push-pull architecture to generate isolated power, with an efficiency of up to 33% at full load. The device also includes a soft-start function to limit inrush current during power-up. Typical applications for the ADUM5411ARWZ-RL7 include isolated SPI interfaces, industrial field buses, medical equipment, and power supply control. Its high data rate and CMTI make it ideal for applications requiring robust communication in noisy environments. The integrated power converter simplifies the design of isolated power supplies, reducing component count and board area. When designing with this device, it is important to ensure proper PCB layout to minimize parasitic capacitance and maintain isolation performance. The input and output power supplies should be decoupled with appropriate capacitors, and the isolation barrier should be kept clear of copper traces to maintain the specified isolation voltage.
ISO6442 - Quad-Channel Digital Isolator 150Mbps | Texas Instruments
The Texas Instruments ISO6442 is a robust EMC, general-purpose quad-channel digital isolator with a 2/2 channel configuration (two forward, two reverse channels), supporting data rates up to 150 Mbps and a common-mode transient immunity (CMTI) of up to 250 kV/us. It is available in a 16-pin wide-body SOIC (DWR, 5000 Vrms reinforced isolation) and a 16-pin SSOP (DBQ, 3000 Vrms basic isolation). A digital isolator is a component that transfers digital signals across a galvanic isolation barrier, blocking high voltages, isolating ground potentials, and preventing noise currents between two sides of a circuit. Within the interface-IC hierarchy, digital isolators sit between logic controllers and high-voltage or noisy domains such as motor drives, inverters, and fieldbus networks. The ISO6442 belongs to TI's ISO644x family of basic and reinforced quad-channel isolators built on a proprietary capacitive isolation architecture using an SiO2 dielectric barrier. Key features include the wide 2.25 V to 5.5 V supply range on both sides, enabling direct interfacing with 1.8 V, 2.5 V, 3.3 V, and 5 V logic; a fail-safe default output of high for the standard ISO6442 during input power or signal loss (the ISO6442F defaults low); and robust EMC performance for harsh industrial noise environments. The reinforced DWR package supports sustained working-voltage isolation requirements. Architecturally, the device modulates the input signal across the capacitive barrier and reconstructs it at the output, delivering low power, high speed, and stable propagation characteristics over temperature and supply variation. Enable pins provide tri-state output control for power management and multipoint bus applications. Typical applications include isolated SPI interfaces, industrial fieldbus communication, motor drives, power inverters, battery management systems, and on-board chargers, where 150 Mbps throughput and 250 kV/us CMTI maintain signal integrity in electrically noisy conditions. When designing, maintain adequate creepage and clearance on the PCB, place 0.1 uF bypass capacitors close to both VCC pins, and verify that propagation delay and pulse-width distortion near 150 Mbps meet the timing requirements of the receiving peripheral.
ISO6442-Q1 - 150Mbps Quad-Channel Digital Isolator | TI
The Texas Instruments ISO6442-Q1 is an automotive-grade quad-channel digital isolator providing two forward and two reverse channels, a data rate up to 150 Mbps, and a common-mode transient immunity (CMTI) of 250 kV/us. The device is qualified to AEC-Q100 for automotive use and is available in reinforced and basic isolation ratings, with the ISO6442DBQRQ1 ordering option packaged in a 16-pin SSOP (DBQ) rated 3000 Vrms. A digital isolator is an integrated circuit that transmits digital signals across a galvanic isolation barrier, blocking high voltages, ground loops, and common-mode noise while passing logic data. Within the interface-IC hierarchy, digital isolators sit between a controller and noisy or high-voltage circuitry, complementing isolated transceivers, gate drivers, and isolated ADCs in systems requiring safety and signal integrity. Key features include the 250 kV/us CMTI, which keeps outputs correct in high-dv/dt environments such as motor-drive inverter legs, and the 150 Mbps data rate supporting fast SPI and parallel logic links. Enable pins allow each direction to be tri-stated for power management. In the event of input power or signal loss, default outputs are high; the ISO6442F-Q1 variant defaults low, giving designers a choice of fail-safe behavior. The ISO6442-Q1 uses TI's proven capacitive isolation technology, delivering robust EMC performance and long-term barrier reliability. The ISO644x-Q1 family (ISO6440/6441/6442 and F variants) shares package options including the DW-16 wide SOIC, DFP-16 wide SSOP, and DBQ-16 SSOP; a Functional Safety FIT rate and pin FMA document (SFFSB42) is available. Typical applications include EV battery management systems, isolated SPI links to current and voltage monitors, motor drives and inverters, and industrial fieldbus isolation. For reliable design, keep copper under the isolation barrier clear, decouple both VCC pins closely, and select the F-suffix variant when a low default output is required for safe power-loss behavior.
ISO7742FDBQR - 100Mbps 4-Ch Reinforced Digital Isolator | TI
The Texas Instruments ISO7742FDBQR is a high-speed, robust-EMC reinforced quad-channel digital isolator in a 16-pin SSOP (DBQ) package with 3.90mm body width. It provides four isolation channels in a 2-forward/2-reverse configuration, supporting data rates up to 100 Mbps and operation from supply voltages of 2.25V to 5.5V on each side, enabling seamless logic-level translation across the isolation barrier. A digital isolator is a component that transmits digital signals across a galvanic isolation barrier, protecting low-voltage circuitry and users from high voltages, ground loops, and common-mode noise. Within the interface-IC hierarchy, it sits between signal-chain ICs and hostile environments, complementing isolated power converters and isolated transceivers in industrial systems. The ISO7742FDBQR belongs to TI's ISO774x family, which uses an on-chip capacitive isolation structure with an oxide barrier, achieving reinforced isolation rated at 3000 Vrms. Key features include a common-mode transient immunity (CMTI) of 85 kV/us minimum, low power consumption, default-output (F suffix) fail-safe behavior that drives outputs low when the input side is unpowered, and a projected barrier lifetime exceeding 30 years at rated working voltage. The device is characterized from -55C to +125C, covering extended industrial and automotive-adjacent environments. Technically, the ISO7742FDBQR encodes input transitions across the capacitive barrier and decodes them on the secondary side, achieving sub-100 Mbps signaling with low propagation delay and low channel-to-channel skew without optocoupler aging effects. Its robust-EMC construction provides high immunity to surge and fast transient events typical of motor-drive and inverter environments. Typical applications include isolated SPI/UART interfaces, industrial fieldbus communication, motor drives and power inverters, and isolated ADC signal paths in renewable-energy systems. Pair it with devices such as the AMC1306M25 or ISO1042 for complete isolated measurement and communication chains. Design tip: maintain datasheet creepage and clearance on the PCB under the isolation barrier, avoid traces crossing the gap, and place 0.1uF decoupling capacitors close to both VCCI and VDD pins to preserve EMC performance.
ISO7830DW - 8000VPK Reinforced 3-Ch Digital Isolator | TI
The Texas Instruments ISO7830DW is a high-performance, triple-channel digital isolator with reinforced isolation rated at 8000-VPK (VIOWM 2000-VRMS) and 14.5-mm creepage. It comes in a 16-pin wide-body SOIC (DW) package and delivers robust galvanic isolation for industrial and automotive systems. The device supports data rates up to 100 Mbps in a 3/0 channel configuration (three forward channels, no reverse), ideal for unidirectional signal isolation. A digital isolator is a component that transfers digital signals across an isolation barrier while blocking DC and unwanted AC currents between two ground domains. Digital isolators sit within the broader hierarchy of interface ICs and optocoupler replacements, using capacitive coupling instead of LED-based optocoupling. They are essential in motor drives, power converters, and communication interfaces where galvanic isolation protects low-voltage control circuitry from high-voltage transients. Key features include a high common-mode transient immunity (CMTI) of 70-100 kV/us, low power consumption (approximately 1.5 mA per channel at 1 Mbps), and a wide supply range of 2.25 V to 5.5 V on both sides. The ISO7830 is certified by VDE, CSA, and TUV for reinforced isolation, and offers a fail-safe output (default low) when the input side is unpowered. Technically, the ISO7830 uses ON-OFF keying (OOK) modulation across an integrated high-voltage capacitive isolation barrier. This architecture provides immunity to magnetic interference, high-speed transmission, and low propagation delay (typically 10.7 ns). The device operates over the industrial temperature range of -40C to +125C and is offered in tube (DW) and tape-and-reel (DWR) options. Typical applications include isolated SPI, UART, and GPIO links in industrial automation, motor control, photovoltaic inverters, EV charging stations, and medical equipment. High CMTI and reinforced isolation ratings fit noise-heavy, high-voltage environments. Design tip: maintain datasheet creepage/clearance on the PCB, keep the area under the barrier free of traces, and decouple both VCC pins with 0.1 uF ceramics close to the pins. Pricing as of 2026-08-30; single-unit price is estimated from distributor quotes and marked for verification.
ISO7831DW - 100Mbps 3-Ch Reinforced Digital Isolator | TI
The Texas Instruments ISO7831DW is a high-performance, reinforced triple-channel digital isolator with a 2/1 channel configuration (two forward, one reverse) and signaling rates up to 100 Mbps. It comes in a 16-pin wide-body SOIC (DW) package providing 14.5 mm creepage and a VIOWM working voltage of 2000 Vrms, with 5700 VRMS isolation and 8000 VPK surge capability. A digital isolator is an integrated circuit that transmits digital signals across a galvanic isolation barrier, blocking high voltages, ground loops, and common-mode transients from reaching sensitive low-voltage circuitry. Within the interface IC hierarchy, digital isolators sit between logic-level translators and fully isolated transceivers; reinforced-class devices such as the ISO7831 represent the highest isolation category under IEC 60747-17. Key features include a common-mode transient immunity (CMTI) of 70 kV/us for reliable operation in noisy switching environments, dual 2.25 V to 5.5 V supplies compatible with low-voltage logic, and an enable pin for output tri-state control. Certifications include UL 1577, IEC 60747-17 (VDE), and CSA, supporting safety-critical end equipment. Technically, the ISO7831 uses TI's proprietary capacitive isolation technology, which outperforms optocouplers with lower power, higher speed, and longer lifetime. Propagation delay is approximately 11 ns with about 1 ns pulse-width distortion, preserving signal timing integrity across the barrier. Operating temperature spans -40C to +125C for harsh industrial conditions. Typical applications include motor-drive gate-control interfaces, isolated SPI/UART communication in industrial fieldbus systems, and power inverter control where reinforced isolation is mandated. High CMTI and low EMI also suit medical equipment requiring patient-safety isolation. Design tip: place 0.1 uF decoupling capacitors close to both VCC1 and VCC2 pins, and use the enable pin to force a defined output state during power sequencing.
SI8442AB-C-IS - 4-Ch 2.5kV Digital Isolator 1Mbps | Skyworks
The Skyworks Solutions SI8442AB-C-IS is a low-power, quad-channel digital isolator rated at 2500 Vrms isolation voltage and supporting a maximum guaranteed data rate of 1 Mbps, housed in a 16-pin wide-body SOIC (0.295 inch / 7.50 mm) package. The device integrates four independent isolation channels in a 2 forward / 2 reverse channel configuration, making it suitable for full-duplex inter-board digital communication. A digital isolator is a semiconductor device that transfers digital signals between two galvanically isolated circuit domains using an internal isolation barrier. The SI8442 family uses Skyworks' proprietary RF isolation technology, which embeds an RF carrier across a silicon-dioxide isolation barrier rather than the older optocoupler or transformer approaches. Within the broader signal-chain taxonomy, the SI8442AB-C-IS is a general-purpose digital isolator -> quad-channel isolator -> digital isolator -> signal isolation IC -> semiconductor. Modern CMOS digital isolators like the SI844x series typically replace legacy optocouplers to achieve lower power, faster propagation, tighter timing, and higher CMTI. Key specifications include 2.70 V to 5.5 V wide operating supply range on both sides, less than 1.6 mA per channel typical quiescent current at 1 Mbps and 5 V, 25 kV/µs typical common-mode transient immunity (CMTI), and 35 ns typical propagation delay. The wide-body SOIC-16 package delivers the standard 8 mm creepage/clearance required for reinforced 2500 Vrms isolation per UL 1577, IEC 60747-17, and CSA 5A component standards. Architecturally, each channel contains an RF encoder on the input side, an isolation barrier using on-chip transformers, and a decoder on the output side. Both VDD1 and VDD2 can be powered independently from any source within 2.70-5.5 V, allowing level translation between mixed-voltage domains. The default-channel output is high; channels return to the correct state on the first input transition - no start-up initialization is required. Typical applications include I2C and SMBus isolation, isolated SPI/UART interfaces, industrial field-bus isolation (RS-485, CAN), motor control gate-driver signal isolation, isolated ADC/DAC digital interfaces, and medical equipment patient-isolation barriers. The SI8442AB-C-IS is also frequently used in solar inverters, EV battery management, and PLC digital-input modules. When designing with this part, place 0.1 µF bypass capacitors as close as possible to both VDD pins and route the GND1/GND2 return paths to keep the barrier capacitance balanced. Verify that the PCB layout maintains at least 8 mm creepage across the barrier; do not place traces or copper under the SOIC-16 body that bridge the input and output sides. This page synthesizes distributor pricing from DigiKey and LCSC, pin-compatible Si844x family variants, and practical PCB/layout guidance not found on a single manufacturer datasheet page.
SI8621AB-B-ISR - 2.5kV 2-Ch Digital Isolator 1Mbps SOIC-8 | Skyworks
The Skyworks Solutions Inc. SI8621AB-B-ISR is a 2-channel, 1 Mbps general-purpose digital isolator that integrates capacitive-coupling isolation technology inside an 8-pin narrow-body SOIC (0.154", 3.90 mm) package. It delivers 2.5 kVrms reinforced isolation across two unidirectional channels (1 forward + 1 reverse), 35 kV/µs typical common-mode transient immunity (CMTI), and supports a wide data rate range from DC up to 1 Mbps per channel. According to the DigiKey listing (4576582), this part is safety-certified by UL, CSA, VDE, and CQC, simplifying end-system regulatory approval. A digital isolator is a semiconductor device that transmits data, control signals, or power across an electrical isolation barrier using either capacitive, inductive (transformer), or optical coupling techniques. Digital isolators replace legacy optocouplers in industrial, automotive, and renewable-energy designs because they integrate the driver, receiver, and isolation barrier into a single CMOS IC, eliminating the need for a discrete LED and photodiode pair. The Si862x family from Skyworks (formerly Silicon Labs' isolation portfolio) sits inside the power management and interface IC hierarchy, sitting alongside gate drivers, isolated ADCs, and isolated CAN/RS-485 transceivers. Key features of the SI8621AB-B-ISR include: 2.5 kVrms withstand voltage rating, 35 kV/µs CMTI that rejects fast transients on noisy motor or switching grounds, Schmitt-trigger inputs with 35 ns typical propagation delay, and dedicated ENABLE inputs that allow a single point to disable the output drivers for power sequencing. The CMOS construction reduces quiescent current per channel versus optocouplers, lowering system standby power in always-on industrial sensors and PLC I/O modules. The SI8621AB-B-ISR uses Skyworks' proprietary CMOS capacitive-coupling isolation technology, where two die — transmitter and receiver — are stacked and coupled through an internal high-voltage SiO2 capacitive barrier. This architecture avoids the bandwidth and lifetime degradation seen in LED-based optocouplers, supports DC-to-1 Mbps signaling with deterministic propagation delay, and integrates EMI-shielded coils to maintain CMTI of 35 kV/µs. Typical applications include isolated digital logic level translation between low-voltage MCUs (3.3 V) and higher-voltage industrial field-side circuits (5 V or 24 V), isolated gate signal transmission for half-bridge MOSFET/IGBT drivers in motor drives, isolated UART/SPI/I2C bridging in solar inverters, and PLC analog/digital I/O isolation. When designing with the SI8621AB-B-ISR, route the high-voltage traces along the isolation barrier (pin 1-4 on one side, pin 5-8 on the other) and respect the 4 mm minimum PCB creepage distance required by 2.5 kVrms reinforced isolation per IEC 60730-1. Decouple both VDD pins with at least 1 µF low-ESR ceramic capacitors placed within 2 mm of the IC. This page consolidates distributor pricing, drop-in alternatives, and practical PCB layout notes that are not duplicated in the manufacturer datasheet, giving engineers a single reference for sourcing and second-sourcing the Si8621AB-B-ISR.