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ADUM1420ARWZ - Quad-Channel Digital Isolator | Analog Devices
ADUM1420ARWZ

ADUM1420ARWZ - Quad-Channel Digital Isolator | Analog Devices

The ADUM1420ARWZ is a quad-channel digital isolator from Analog Devices, based on iCoupler technology. It provides 4 channels of isolation with 2500Vrms isolation rating, supporting data rates up to 10 Mbps. The device operates from a 3V to 5.5V supply and is available in a 16-lead SOIC package (0.295" width). It features low power consumption, with 1.0 mA per channel at 0-2 Mbps and 3.5 mA per channel at 10 Mbps for 5V operation. The ADUM1420ARWZ is designed for general-purpose isolation in industrial, medical, and communication systems, offering superior performance compared to optocouplers by eliminating LED and photodiode aging effects. Digital isolators are components that provide electrical isolation between two circuits while allowing digital signals to pass. They are essential in applications where ground potential differences, noise, or safety requirements demand galvanic isolation. The ADUM1420ARWZ uses iCoupler technology, which combines high-speed CMOS and monolithic air core transformers to achieve reliable isolation without the wear-out mechanisms of optocouplers. This makes it a preferred choice for high-reliability systems. Key features include 4/0 channel directionality (all inputs on one side, all outputs on the other), 25kV/µs common-mode transient immunity (CMTI), and a wide operating temperature range of -40°C to +105°C. The device supports both 3V and 5V supplies, making it versatile for mixed-voltage systems. Its low power consumption is critical for power-sensitive designs. The ADUM1420ARWZ is part of the ADuM140x family, which includes variants with different channel configurations and data rates. The 'A' grade indicates a 10 Mbps data rate, while 'B' and 'C' grades offer 25 Mbps and 90 Mbps respectively. The 'RWZ' suffix denotes the 16-lead SOIC package with a 7.50mm body width. Typical applications include industrial fieldbus isolation, medical equipment isolation, isolated SPI/UART interfaces, and power supply control. The device is also suitable for automotive and aerospace systems where reliability and isolation are paramount. When designing with the ADUM1420ARWZ, ensure proper PCB layout with adequate creepage and clearance distances for the required isolation rating. Bypass capacitors should be placed close to the VDD pins to minimize noise. The device does not require external components for isolation, simplifying design.

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ADUM1420ARWZ-RL7 - Quad Digital Isolator 2500Vrms | Analog Devices
ADUM1420ARWZ-RL7

ADUM1420ARWZ-RL7 - Quad Digital Isolator 2500Vrms | Analog Devices

The ADUM1420ARWZ-RL7 is a quad-channel digital isolator from Analog Devices, based on iCoupler technology. It provides galvanic isolation up to 2500Vrms, with a data rate of 1Mbps and common-mode transient immunity of 25kV/µs. The device is housed in a 16-lead SOIC-W package (0.295" width) and is available in tape and reel packaging (RL7). Digital isolators are components that transfer digital signals across an isolation barrier, preventing DC current flow while allowing AC signals to pass. They are essential in applications requiring safety isolation, ground loop elimination, and level shifting. The ADUM1420 uses monolithic air core transformers and CMOS technology, offering superior performance compared to optocouplers, including higher speed, lower power, and better reliability. Key features include four independent isolation channels, a wide supply voltage range of 3.0V to 5.5V, and a maximum data rate of 1Mbps. The device operates over the industrial temperature range of -40°C to +125°C. Its high common-mode transient immunity of 25kV/µs ensures reliable operation in noisy environments. The ADUM1420's architecture uses iCoupler technology, which integrates micro-transformers on a CMOS die, eliminating the need for LEDs and photodiodes. This results in lower power consumption, higher data rates, and longer lifespan compared to optocouplers. The device also features a default output state that is high when the input power is off, ensuring fail-safe operation. Typical applications include industrial field bus isolation, SPI isolation, RS-232/RS-485 isolation, and general-purpose digital isolation in motor drives, power inverters, and medical equipment. The wide supply range and robust isolation make it suitable for both 3.3V and 5V systems. When designing with the ADUM1420, ensure proper PCB layout with adequate creepage and clearance distances for the isolation barrier. Bypass capacitors should be placed close to the VDD pins to minimize noise. The device is RoHS compliant and lead-free.

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ADUM1421ARWZ - Quad-Channel Digital Isolator | Analog Devices
ADUM1421ARWZ

ADUM1421ARWZ - Quad-Channel Digital Isolator | Analog Devices

The ADUM1421ARWZ is a quad-channel digital isolator from Analog Devices, based on iCoupler technology. It provides four independent isolation channels with a channel configuration of 2/2 (two forward, two reverse), supporting data rates up to 1 Mbps. The device operates with supply voltages from 2.7 V to 5.5 V on both sides, enabling voltage translation across the isolation barrier. It is housed in a 16-lead SOIC-W package (0.295" width, 7.50 mm body) and provides 2500 Vrms isolation rating with a common-mode transient immunity (CMTI) of 25 kV/µs. A digital isolator is a component that transfers digital signals across an isolation barrier without a direct electrical connection, using capacitive, inductive, or optical coupling. The ADUM1421ARWZ uses Analog Devices' iCoupler technology, which employs monolithic air core transformers to couple signals, offering advantages over optocouplers such as higher data rates, lower power consumption, and better reliability. Digital isolators are essential in systems where galvanic isolation is required for safety, noise immunity, or ground potential differences, such as in industrial automation, medical equipment, and communication interfaces. Key features of the ADUM1421ARWZ include its 2/2 channel configuration (two channels forward, two reverse), 1 Mbps data rate, and 25 kV/µs CMTI. The device supports a wide supply range of 2.7 V to 5.5 V on both VDD1 and VDD2, allowing use in low-voltage systems and enabling level shifting. The isolation barrier provides 2500 Vrms isolation, suitable for many industrial and medical applications. The SOIC-16 package is widely used and easy to integrate into PCB designs. Technically, the ADUM1421ARWZ uses iCoupler technology, which combines high-speed CMOS and monolithic air core transformers. This architecture avoids the LED and photodiode aging issues of optocouplers, providing more stable performance over time and temperature. The device has a propagation delay of approximately 100 ns and a pulse width distortion of 40 ns, ensuring accurate signal transmission. The CMTI of 25 kV/µs ensures reliable operation in noisy environments, preventing false triggering due to fast voltage transients across the isolation barrier. Typical applications include industrial field bus isolation, motor control, power supply isolation, and isolated SPI or UART interfaces. The ADUM1421ARWZ is also suitable for medical equipment requiring patient isolation, and for communication interfaces where ground loops must be avoided. Its low power consumption and small package make it ideal for space-constrained designs. When designing with the ADUM1421ARWZ, ensure proper decoupling capacitors (0.1 µF) are placed close to each VDD pin. The supply voltage on each side must be within the specified range, and the output load capacitance should be limited to avoid excessive propagation delay. For high-voltage isolation, maintain adequate creepage and clearance distances on the PCB.

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ADUM1421ARWZ-RL7 - 4-Ch Digital Isolator 3750Vrms | Analog Devices
ADUM1421ARWZ-RL7

ADUM1421ARWZ-RL7 - 4-Ch Digital Isolator 3750Vrms | Analog Devices

The ADUM1421ARWZ-RL7 is a micropower, 4-channel digital isolator from Analog Devices, based on iCoupler technology. It provides 3750Vrms isolation with a data rate of 2Mbps and a common-mode transient immunity of 25kV/us. The device is available in a 20-lead SOIC-W package and operates over the industrial temperature range of -40C to +125C. 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.

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ADUM1440ARWZ - Quad-Channel Digital Isolator | Analog Devices
ADUM1440ARWZ

ADUM1440ARWZ - Quad-Channel Digital Isolator | Analog Devices

The ADUM1440ARWZ is a quad-channel digital isolator from Analog Devices, based on iCoupler technology. It provides 4/0 channel directionality, meaning all four channels are forward-direction, and is housed in a 16-lead SOIC-W package. The device offers 2500 Vrms isolation voltage, a data rate of 1 Mbps, and a common-mode transient immunity (CMTI) of 25 kV/µs. It operates from a 3.3V or 5V supply and is designed for general-purpose isolation in industrial, medical, and communication systems. Digital isolators are components that transmit digital signals across an isolation barrier, providing galvanic isolation to protect circuits and users from high voltages, ground loops, and noise. Unlike optocouplers, which use LEDs and photodiodes, iCoupler devices use monolithic air-core transformers and high-speed CMOS, offering superior performance in terms of speed, power consumption, and reliability. The ADUM1440 is part of the ADuM140x family, which includes variants with different channel configurations and data rates. Key features of the ADUM1440ARWZ include low power operation: at 5V, it consumes 1.0 mA per channel max at 0-2 Mbps, 3.5 mA per channel at 10 Mbps, and 31 mA per channel at 100 Mbps. At 3V, the power consumption is even lower. The device supports a wide operating temperature range of -40°C to +105°C, making it suitable for harsh environments. It is RoHS compliant and available in a standard SOIC-16 package. The ADUM1440 uses iCoupler technology, which integrates micro-transformers on a single chip, eliminating the need for external components and providing high reliability. The isolation barrier is rated for 2500 Vrms, and the device offers high CMTI of 25 kV/µs, ensuring robust operation in noisy industrial environments. The 1 Mbps data rate is sufficient for many control and monitoring applications, and the low power consumption makes it ideal for battery-powered or power-sensitive designs. Typical applications include industrial field bus isolation, motor control, power supply monitoring, and medical equipment. The ADUM1440 is also used in communication interfaces, such as RS-485 and CAN, where galvanic isolation is required. Its small package and low power make it a versatile choice for space-constrained designs. When designing with the ADUM1440, ensure proper PCB layout to maintain isolation spacing and minimize parasitic capacitance. The device requires a bypass capacitor on each supply pin, and the ground planes should be separated to preserve the isolation barrier. For higher data rates, consider the ADUM1400 series with 10 Mbps or 100 Mbps options.

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ADUM1440ARWZ-RL7 - 4-Ch Digital Isolator 2Mbps | Analog Devices
ADUM1440ARWZ-RL7

ADUM1440ARWZ-RL7 - 4-Ch Digital Isolator 2Mbps | Analog Devices

The ADUM1440ARWZ-RL7 is a micropower, quad-channel digital isolator from Analog Devices, based on the iCoupler technology. It provides 4/0 channel directionality with a default high output state, and is designed for low-power applications where isolation is required. The device operates from a 2.25V to 3.6V supply on each side, with a data rate of 2 Mbps and a CMTI of 25 kV/µs. It is available in a 16-lead SOIC-W package, offering 2500 Vrms isolation. A digital isolator is a component that transfers digital signals across an isolation barrier, providing galvanic isolation to protect circuits and users from high voltages, ground loops, and noise. It is a key element in industrial, medical, and communication systems where safety and signal integrity are critical. Digital isolators are part of the broader category of isolation components, which also include optocouplers and magnetic isolators. Key features of the ADUM1440ARWZ-RL7 include its micropower consumption, with a typical supply current of 0.6 mA per channel at 2 Mbps, making it ideal for battery-powered and energy-harvesting applications. The device also features a default high output state, which ensures a defined output during power-up or when the input is unpowered, enhancing system safety. The iCoupler technology provides superior performance compared to optocouplers, including higher data rates, lower power, and better reliability. Technically, the ADUM1440ARWZ-RL7 uses monolithic air core transformers to couple signals across the isolation barrier, combined with CMOS logic for signal processing. This architecture enables high-speed operation with low propagation delay and excellent timing accuracy. The device is specified over the industrial temperature range of -40°C to +125°C, making it suitable for harsh environments. Typical applications include industrial fieldbus communication, isolated SPI interfaces, medical patient monitoring, and power supply control. The low power consumption and small package make it ideal for space-constrained designs. When designing with this device, ensure proper PCB layout with adequate creepage and clearance distances to maintain the isolation rating. Also, decouple each supply pin with a 0.1 µF capacitor close to the device.

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ADUM1441ARWZ - Micro-Power Quad Digital Isolator | Analog Devices
ADUM1441ARWZ

ADUM1441ARWZ - Micro-Power Quad Digital Isolator | Analog Devices

The ADUM1441ARWZ is a micro-power, 4-channel digital isolator from Analog Devices, utilizing the iCoupler technology that combines high-speed CMOS and monolithic air core transformer technology. It provides outstanding performance characteristics superior to alternatives, with a data rate of 2 Mbps and a withstand voltage of 2500 Vrms. The device operates over a supply voltage range of 3.0 V to 3.6 V on both VDD1 and VDD2, and is specified over the temperature range of -40°C to +125°C. It is available in a 16-lead SOIC-W package (ADUM1441ARWZ) and also in a 16-lead QSOP package (ADUM1441ARQZ). A digital isolator is a component that provides galvanic 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 isolation, such as in industrial automation, medical equipment, and communication systems. Digital isolators replace optocouplers in many designs due to their higher speed, lower power consumption, and better reliability. Key features of the ADUM1441ARWZ include ultra-low power consumption: in standard operating mode with internal refresh enabled (ENx = 0), the current per channel is less than 10 μA; with internal refresh disabled (ENx = 1), it drops to less than 1 μA. This makes it ideal for battery-powered and energy-harvesting applications. The device also features a common-mode transient immunity (CMTI) of 25 kV/µs, ensuring reliable operation in noisy environments. The ADUM1441ARWZ uses a refresh mechanism to maintain output states when the input is static, which is a key differentiator from older isolators. The internal refresh can be disabled via the ENx pins to further reduce power consumption, but this requires the input to be toggled periodically to maintain the output state. This architecture allows for extremely low quiescent current, making it one of the most power-efficient digital isolators available. Typical applications include SPI, I2C, and UART isolation in industrial field buses, isolated sensor interfaces, and power supply control loops. The low power consumption and small package make it suitable for space-constrained designs. When designing with this device, ensure that the ENx pins are configured correctly to achieve the desired power-performance trade-off, and consider the need for periodic signal toggling when internal refresh is disabled.

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ADUM1442ARWZ - Micropower Quad-Channel Digital Isolator | Analog Devices
ADUM1442ARWZ

ADUM1442ARWZ - Micropower Quad-Channel Digital Isolator | Analog Devices

The ADUM1442ARWZ is a micropower, quad-channel digital isolator from Analog Devices, based on the iCoupler technology that combines high-speed CMOS and monolithic air core transformer technologies. It provides outstanding performance characteristics superior to alternative isolation solutions. This device operates over a supply voltage range of 3.0 V to 3.6 V on both sides (VDD1 and VDD2), with a recommended operating temperature range of -40°C to +125°C. The ADUM1442ARWZ is available in a 16-lead SOIC-W package, offering 4 isolation channels with a data rate of 2 Mbps and a common-mode transient immunity (CMTI) of 25 kV/µs. Digital isolators are essential components in systems requiring galvanic isolation between different ground domains, protecting sensitive electronics from high-voltage transients and ground loops. They are widely used in industrial automation, medical equipment, and communication interfaces. The ADUM1442ARWZ is specifically designed for low-power applications, with a typical quiescent current of less than 10 µA per channel when internal refresh is enabled (ENx = 0), and less than 1 µA per channel when internal refresh is disabled (ENx = 1). This makes it ideal for battery-powered and energy-harvesting systems where power consumption is critical. Key features of the ADUM1442ARWZ include its micropower operation, high CMTI of 25 kV/µs, and a wide operating temperature range. The device supports a data rate of 2 Mbps, suitable for slow serial communication interfaces like SPI and I2C. The isolation voltage rating is 2500 Vrms for the ARWZ variant, which is sufficient for many industrial and medical applications. The device also features an enable pin (ENx) for each channel pair, allowing the user to disable the internal refresh oscillator to further reduce power consumption. In terms of technical depth, the ADUM1442ARWZ uses iCoupler technology, which integrates micro-transformers on a CMOS die, providing reliable isolation without the need for external components. The device is fully specified over the entire operating range, ensuring consistent performance across temperature and supply variations. The propagation delay is typically 100 ns, and the pulse width distortion is minimal, making it suitable for precise timing applications. Typical applications for the ADUM1442ARWZ include isolated SPI interfaces, industrial fieldbus communication, medical patient monitoring, and battery management systems. Its low power consumption and high CMTI make it particularly well-suited for applications where noise immunity and power efficiency are paramount. When designing with this device, it is important to ensure proper decoupling of the power supply pins with 0.1 µF capacitors placed close to the device. Additionally, the enable pins should be configured according to the desired power-saving mode, and the input/output logic levels should be compatible with the connected circuitry.

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ADUM1442ARWZ-RL7 - Micropower Quad Digital Isolator | Analog Devices
ADUM1442ARWZ-RL7

ADUM1442ARWZ-RL7 - Micropower Quad Digital Isolator | Analog Devices

The ADUM1442ARWZ-RL7 is a micropower, 4-channel digital isolator from Analog Devices, based on the iCoupler technology that combines high-speed CMOS and monolithic air core transformer technology. It provides outstanding performance characteristics superior to alternative isolation solutions, offering 2 Mbps data rate, 25 kV/µs common-mode transient immunity (CMTI), and a wide operating temperature range of -40°C to +125°C. The device is available in a 20-lead SOIC-W (RW-20) package, providing 3750 Vrms isolation rating, making it suitable for a variety of industrial and instrumentation applications. A digital isolator is a component that provides galvanic 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 electrical separation. Digital isolators are part of the broader category of isolation components, which also include optocouplers and magnetic isolators. The ADUM1442ARWZ-RL7 uses iCoupler technology, which employs micro-transformers to transfer data across the isolation barrier, offering advantages such as higher speed, lower power consumption, and better reliability compared to optocouplers. Key features of the ADUM1442ARWZ-RL7 include its micropower operation, with a typical supply current of 0.6 mA per channel at 3.3 V, making it ideal for power-sensitive applications. It supports a wide supply voltage range of 3.0 V to 3.6 V on both sides, and offers a data rate of 2 Mbps. The device provides 4 isolation channels with a channel configuration of 2/2 (two forward and two reverse), and features a default output state of high. It also includes an enable function on each side, allowing the outputs to be placed in a high-impedance state. Technically, the ADUM1442ARWZ-RL7 is designed with a refresh mechanism that ensures the output state is maintained even when the input is not toggling, preventing data corruption. The device has a propagation delay of 23 ns typical, and a pulse width distortion of 3 ns. It is certified to UL1577, IEC 60747-5-5 (VDE 0884-10), and CSA standards, ensuring robust isolation performance. The device is also RoHS compliant and lead-free. Typical applications for the ADUM1442ARWZ-RL7 include industrial field bus isolation, SPI isolation, RS-232/RS-485 isolation, and general-purpose digital isolation in systems where low power consumption is critical. Its micropower operation makes it particularly suitable for battery-powered or energy-harvesting applications. When designing with this device, it is important to ensure proper PCB layout to maintain the isolation barrier's integrity. Keep the isolation gap clear of copper and components, and place decoupling capacitors close to the supply pins. Also, consider the CMTI requirement of 25 kV/µs to avoid false triggering in noisy environments.

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ADUM1445ARWZ - Micropower Quad Digital Isolator | Analog Devices
ADUM1445ARWZ

ADUM1445ARWZ - Micropower Quad Digital Isolator | Analog Devices

The ADUM1445ARWZ is a micropower, quad-channel digital isolator from Analog Devices, utilizing the iCoupler technology to provide galvanic isolation up to 2500 Vrms. It features a default low output and 4/1 directionality, meaning four channels are forward (input to output) and one channel is reverse (output to input). The device operates over a supply voltage range of 3.0 V to 3.6 V on both VDD1 and VDD2, with a maximum data rate of 2 Mbps and a common-mode transient immunity (CMTI) of 25 kV/µs. The ADUM1445ARWZ is available in a 16-lead SOIC-W package, which is wider than the standard SOIC-16, providing enhanced creepage and clearance for high-voltage isolation applications. Digital isolators are essential components in systems that require signal transfer across an isolation barrier to protect low-voltage circuitry from high-voltage transients, ground loops, or noise. They are commonly used in industrial automation, medical equipment, and communication interfaces where safety and signal integrity are paramount. The ADUM1445ARWZ belongs to the family of digital isolators, which are part of the broader category of interface ICs, and specifically to the micropower segment that minimizes power consumption for battery-powered or energy-efficient designs. Key features of the ADUM1445ARWZ include its ultra-low power consumption: in standard operating mode with internal refresh enabled (ENx = 0), the current per channel is less than 10 µA, and with internal refresh disabled (ENx = 1), it drops to less than 1 µA. This makes it ideal for power-sensitive applications. The device also offers a wide operating temperature range of -40°C to +125°C, ensuring reliability in harsh environments. The 2500 Vrms isolation rating provides robust protection against voltage spikes and ground potential differences. Technically, the ADUM1445ARWZ uses Analog Devices' iCoupler technology, which combines high-speed CMOS and monolithic air core transformers to achieve isolation without the need for external components. The device supports a 2 Mbps data rate, which is sufficient for many control and monitoring applications. The CMTI of 25 kV/µs ensures that the isolator can reject fast transients, making it suitable for noisy industrial environments. The default low output state ensures that if the input power is lost, the output defaults to a known safe state, which is critical for fail-safe designs. Typical applications for the ADUM1445ARWZ include industrial fieldbus communication, isolated SPI interfaces, and general-purpose signal isolation in motor drives, power inverters, and medical monitoring equipment. Its low power consumption makes it particularly well-suited for battery-operated instruments and portable devices where every microamp counts. When designing with the ADUM1445ARWZ, it is important to ensure proper decoupling of the VDD1 and VDD2 supplies with 0.1 µF capacitors placed close to the pins. Additionally, the ENx pins can be used to disable the internal refresh, further reducing power consumption in applications where the data rate is low and the input signals are static. Care should be taken to maintain the recommended operating conditions to ensure reliable isolation performance.

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ADUM1445ARWZ-RL7 - 4-Ch Digital Isolator | Analog Devices
ADUM1445ARWZ-RL7

ADUM1445ARWZ-RL7 - 4-Ch Digital Isolator | Analog Devices

The ADUM1445ARWZ-RL7 is a micropower, quad-channel digital isolator from Analog Devices, based on the iCoupler technology. It provides 4 isolation channels with a default low output and a 4/1 directionality configuration, meaning four channels are forward (input to output) and one channel is reverse (output to input). The device is designed for low-power applications, consuming significantly less power than traditional optocouplers while offering superior performance in terms of speed, reliability, and integration. 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. They are widely used in industrial automation, medical equipment, and communication systems to protect sensitive electronics and ensure signal integrity. Key features of the ADUM1445ARWZ-RL7 include a data rate of 2 Mbps, a common-mode transient immunity (CMTI) of 25 kV/µs, and an isolation voltage rating of 3750 Vrms. The device operates over a supply voltage range of 3.0 V to 3.6 V on both sides, with a typical quiescent current of 0.6 mA per channel. It is available in a 20-lead SOIC-W package, which is suitable for space-constrained designs. The ADUM1445ARWZ-RL7 utilizes iCoupler technology, which combines high-speed CMOS and monolithic air core transformer technology. This architecture provides outstanding performance characteristics, including low power consumption, high data rates, and reliable isolation. The device also features a default low output state, ensuring that the output is in a known state when the input power is not applied. Typical applications for the ADUM1445ARWZ-RL7 include industrial field bus isolation, SPI isolation, and general-purpose signal isolation in systems where low power consumption is critical. Its low power consumption makes it ideal for battery-powered or energy-harvesting applications, while its high CMTI ensures reliable operation in noisy industrial environments. When designing with this device, it is important to ensure proper power supply decoupling on both sides of the isolation barrier. Use 0.1 µF ceramic capacitors close to the VDD1 and VDD2 pins to minimize noise and ensure stable operation. Additionally, consider the directionality configuration to ensure correct signal routing.

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ADUM1446ARWZ - Micropower Quad Digital Isolator | Analog Devices
ADUM1446ARWZ

ADUM1446ARWZ - Micropower Quad Digital Isolator | Analog Devices

The ADUM1446ARWZ is a micropower quad-channel digital isolator from Analog Devices, designed for low-power and space-constrained applications. It provides four independent isolation channels with a 2 Mbps data rate and a 25 kV/µs common-mode transient immunity (CMTI). The device operates from a 3.0 V to 3.6 V supply on both sides, with a typical quiescent current of less than 10 µA per channel when the internal refresh is enabled, and less than 1 µA per channel when disabled. This ultra-low power consumption makes it ideal for battery-powered and energy-harvesting systems. Digital isolators are components that transmit digital signals across an isolation barrier, providing galvanic isolation to protect sensitive circuitry from high voltages, noise, and ground loops. They are essential in industrial automation, medical devices, and communication systems where safety and signal integrity are paramount. The ADUM1446ARWZ uses Analog Devices' iCoupler technology, which combines high-speed CMOS and monolithic transformer isolation to achieve reliable performance without the wear-out mechanisms of optocouplers. Key features include a 2.5 kVrms isolation rating, a wide operating temperature range of -40°C to +125°C, and a compact 16-lead SOIC-W package. The device supports both 3.3 V and 5 V logic levels, making it versatile for mixed-voltage systems. Its low propagation delay and high CMTI ensure robust operation in noisy industrial environments. Technically, the ADUM1446ARWZ integrates four independent isolation channels with a refresh mechanism that reduces power consumption when the input signal is static. The enable pins (ENx) allow each channel to be individually controlled, further optimizing power usage. The device is fully specified over the recommended operating range of 3.0 V to 3.6 V, ensuring consistent performance across temperature and voltage variations. Typical applications include isolated SPI interfaces, industrial fieldbus communication, medical patient monitoring, and isolated sensor data acquisition. The low power consumption and high reliability make it suitable for portable and remote monitoring equipment. When designing with the ADUM1446ARWZ, 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 and ensure stable operation.

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ADUM1446ARWZ-RL7 - 4-Ch Digital Isolator 2Mbps | Analog Devices
ADUM1446ARWZ-RL7

ADUM1446ARWZ-RL7 - 4-Ch Digital Isolator 2Mbps | Analog Devices

The ADUM1446ARWZ-RL7 is a micropower, 4-channel digital isolator from Analog Devices, based on the iCoupler technology that combines high-speed CMOS and monolithic air core transformer technology. It provides outstanding performance characteristics superior to alternative isolation technologies, such as optocouplers. This device is designed for general-purpose isolation in a wide range of applications, offering 2500Vrms isolation voltage, 2Mbps data rate, and 25kV/µs common-mode transient immunity (CMTI). It is available in a 16-lead SOIC-W package (RW-16), which is the 'W' variant of the ADUM1446 family, and is supplied in tape and reel packaging (RL7). 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 ADUM1446 is part of the ADUM144x family, which includes various channel configurations and data rates, all sharing the same iCoupler core technology. Key features of the ADUM1446ARWZ-RL7 include its low power consumption, making it suitable for battery-powered and energy-efficient designs. It operates over a wide supply voltage range of 3.0V to 3.6V on both sides, with a temperature range of -40°C to +125°C. The device supports 4 unidirectional channels with a default output state that can be configured. Its high CMTI of 25kV/µs ensures reliable operation in noisy environments. The ADUM1446 uses iCoupler technology, which integrates micro-transformers on a CMOS die, providing a robust and reliable isolation barrier. This architecture offers advantages over optocouplers, including higher data rates, lower power consumption, and better timing accuracy. The device also features a refresh mechanism to maintain output states even when input signals are absent, ensuring fail-safe operation. Typical applications include industrial fieldbus isolation, SPI isolation, and isolated data acquisition systems. Its low power and high CMTI make it ideal for use in motor control, power inverters, and medical monitoring equipment. The wide temperature range and small package footprint enable compact and reliable designs. When designing with this device, ensure proper PCB layout with adequate creepage and clearance distances for the required isolation rating. Also, place decoupling capacitors close to the VDD1 and VDD2 pins to minimize noise and ensure stable operation.

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ADUM1447ARWZ - Micropower Quad-Channel Digital Isolator | Analog Devices
ADUM1447ARWZ

ADUM1447ARWZ - Micropower Quad-Channel Digital Isolator | Analog Devices

The ADUM1447ARWZ is a micropower quad-channel digital isolator from Analog Devices, designed for low-power and space-constrained applications. It provides four independent isolation channels with a withstand voltage rating of 2500 Vrms, ensuring robust galvanic isolation for signal integrity in mixed-voltage systems. The device operates over a supply voltage range of 3.0 V to 3.6 V on both sides, with a data rate of 2 Mbps and a common-mode transient immunity (CMTI) of 25 kV/µs, making it suitable for industrial and instrumentation environments where noise and ground loops are a concern. Digital isolators are essential components in systems that require signal transfer across an isolation barrier to protect sensitive electronics from high voltages, noise, or ground potential differences. They replace optocouplers in many applications, offering higher speed, lower power consumption, and better reliability. The ADUM1447ARWZ belongs to the family of digital isolators, which are part of the broader category of interface ICs, used to transmit digital signals while providing electrical isolation. Key features of the ADUM1447ARWZ include its micropower operation, with a typical quiescent current of less than 10 µA per channel when internal refresh is enabled, and less than 1 µA per channel when disabled. This makes it ideal for battery-powered or energy-harvesting systems. The device also features a wide operating temperature range of -40°C to +125°C, ensuring reliable performance in harsh environments. The package is a 16-lead SOIC-W (wide body), which is suitable for surface-mount assembly. Technically, the ADUM1447ARWZ uses Analog Devices' iCoupler technology, which combines high-speed CMOS and monolithic transformer isolation. This architecture provides superior performance compared to optocouplers, including higher data rates, lower power consumption, and better timing accuracy. The device supports two unidirectional channels in one direction and two in the other, offering flexibility in various signal routing configurations. The internal refresh mechanism ensures that the output state is maintained even when the input is static, preventing data corruption. Typical applications include industrial fieldbus communication, isolated SPI interfaces, data acquisition systems, and medical equipment where patient safety requires galvanic isolation. The low power consumption and high CMTI make it particularly suitable for portable and battery-operated devices. In addition, the device is compatible with standard CMOS logic levels, simplifying integration with microcontrollers and other digital ICs. When designing with the ADUM1447ARWZ, it is important to ensure proper power supply decoupling on both sides of the isolation barrier. Use 0.1 µF ceramic capacitors close to the VDD1 and VDD2 pins to minimize noise. Also, consider the maximum data rate and CMTI requirements of your application to ensure reliable operation.

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ADUM1447ARWZ-RL7 - Quad-Channel Digital Isolator | Analog Devices
ADUM1447ARWZ-RL7

ADUM1447ARWZ-RL7 - Quad-Channel Digital Isolator | Analog Devices

The ADUM1447ARWZ-RL7 is a quad-channel digital isolator from Analog Devices, designed for general-purpose isolation in industrial, medical, and communication systems. It provides 2500 Vrms isolation with a data rate of 2 Mbps and a common-mode transient immunity (CMTI) of 25 kV/µs. The device operates over a wide supply range of 3.0 V to 5.5 V on both sides, with a quiescent current of only 0.6 mA per channel, making it ideal for low-power applications. It is available in a 16-lead SOIC-W package (0.300" width), which is the 'W' variant of the ADuM1447 family. A digital isolator is a component that provides galvanic isolation between two circuits while allowing digital signals to pass across the isolation barrier. It uses capacitive or magnetic coupling to transfer data without a direct electrical connection, protecting sensitive electronics from high voltages, ground loops, and noise. Digital isolators are essential in systems where safety, signal integrity, and noise immunity are critical, such as in industrial automation, medical devices, and isolated power supplies. Key features of the ADUM1447ARWZ-RL7 include its low power consumption (0.6 mA per channel at 3.3 V), high CMTI of 25 kV/µs, and a wide operating temperature range of -40°C to +125°C. The device supports a data rate of 2 Mbps, which is suitable for most control and communication interfaces. It also features a default output state of high when the input power is not applied, ensuring fail-safe operation in safety-critical systems. Technically, the ADuM1447 uses Analog Devices' iCoupler technology, which employs chip-scale transformers to achieve isolation. This technology provides superior performance compared to optocouplers, including higher data rates, lower power consumption, and better reliability. The device is fully specified over the entire operating range, with propagation delay of 23 ns and pulse width distortion of 3 ns, ensuring accurate signal transmission. Typical applications include isolated SPI, UART, and I2C interfaces, as well as isolated sensor data acquisition, motor control, and power supply monitoring. The ADUM1447ARWZ-RL7 is particularly suited for battery-powered or energy-harvesting systems where low power is critical. When designing with this device, ensure that the bypass capacitors are placed close to the VDD1 and VDD2 pins to minimize noise. Also, consider the isolation rating and creepage requirements for your specific application to maintain safety standards.

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ADUM151N0BRZ - 5-Ch 150Mbps Digital Isolator | Analog Devices
ADUM151N0BRZ

ADUM151N0BRZ - 5-Ch 150Mbps Digital Isolator | Analog Devices

The Analog Devices ADUM151N0BRZ is a 5-channel general-purpose digital isolator based on ADI's proprietary iCoupler technology, integrating high-speed CMOS with monolithic air-core transformers on a single die. It provides 3000 Vrms isolation, supports data rates up to 150 Mbps with a maximum 13 ns propagation delay, and delivers 75 kV/µs common-mode transient immunity (CMTI) in a 16-pin wide-body SOIC package. A digital isolator is a semiconductor device that transfers logic-level signals across an isolation barrier while blocking high-voltage DC and AC transients. Digital isolators belong to the signal-conditioning hierarchy: digital isolator -> isolation component -> interface IC -> semiconductor, and they replace legacy optocouplers with superior speed, timing accuracy, channel density, and common-mode noise rejection. The ADuM151N family specifically uses planar air-core transformers rather than LEDs and photodiodes, eliminating the aging, CTR-degradation, and low-speed issues inherent to optocouplers. Key features include a 1.7 V to 5.5 V supply range that supports direct interfacing with both 3.3 V and 5 V logic without level shifters, a 4/1 channel direction split (four inputs on the A-side, one on the B-side), sub-5 ns pulse-width distortion, and precise timing that preserves protocol integrity for SPI, I2C, GPIO, and clock signals. The wide-body 16-SOIC with 3.9 mm package width provides the required creepage and clearance for reinforced insulation at 3000 Vrms. Architecturally, each channel uses a differential transformer winding pair driven by a CMOS encoder/decoder pair; the chip integrates oscillator, refresh, and watchdog circuits that DC-correct the duty cycle, eliminating the random pulse-width skew seen in simple transformer isolators. The 75 kV/µs CMTI rating ensures error-free operation when switching high-side power transistors in motor drives, solar inverters, and industrial PLC interfaces. Typical applications include isolated SPI interfaces between microcontrollers and high-voltage gate drivers, isolated gate-drive signal paths for IGBT/MOSFET bridges in motor control, isolated data acquisition front-ends in industrial PLCs, isolated USB/RS-485/RS-232 transceivers, and medical equipment where patient-connected circuits require reinforced 3000 Vrms isolation. The wide-body SOIC footprint also makes it PCB-compatible with most legacy opto and iCoupler drop-in designs. When designing with this part, follow Analog Devices' PCB layout guideline: maintain a continuous moat under the package body so no PCB copper or traces cross the isolation barrier. Place 0.1 µF decoupling capacitors at each VDDx pin within 2 mm of the pin, and never share VDDx domains between isolated sides. Derate operating voltage versus altitude per IEC 60664-1. This page consolidates distributor pricing, drop-in iCoupler alternatives, and practical PCB-layout notes that are not collected on a single datasheet page.

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ADUM151N0BRZ-RL7 - 5-Ch 150Mbps Digital Isolator | Analog Devices
ADUM151N0BRZ-RL7

ADUM151N0BRZ-RL7 - 5-Ch 150Mbps Digital Isolator | Analog Devices

The Analog Devices ADUM151N0BRZ-RL7 is a 5-channel general-purpose digital isolator rated for 3000 Vrms isolation, supporting data rates up to 150 Mbps with a common-mode transient immunity (CMTI) of 75 kV/us, packaged in a 16-pin SOIC (0.154", 3.90 mm width) wide-body NSOIC and supplied on a 7-inch reel. What is a digital isolator? A digital isolator is a semiconductor device that transfers logic-level signals across an galvanically isolated barrier - typically 2.5 kV to 5 kVrms - while rejecting ground-potential differences, common-mode transients, and EMI. Digital isolators are members of the broader isolation IC family (digital isolator > isolator > interface IC > signal conditioning), and they have largely replaced optocouplers in modern industrial, automotive, and medical designs because they offer higher speed, lower power, tighter channel-to-channel matching, and better long-term reliability. Analog Devices' iCoupler technology uses chip-scale air-core transformers to magnetically couple data across the isolation barrier, while CMOS inputs/outputs provide standard logic-level interfaces. Key features of the ADuM151N include 5 independent isolation channels configured as 4 forward / 1 reverse in the default MPN suffix, 150 Mbps maximum guaranteed signaling rate, default-output (L-level on power-up) channel behavior, 1.5 ns typical propagation delay, and wide 1.7 V to 5.5 V supply operation on both sides of the barrier. The device supports up to 25 Mbps NRZ signaling with low pulse-width distortion and integrates refresh circuits that continuously update DC output state without signal-edge activity. Technically, the ADuM151N combines high-speed CMOS and monolithic air-core transformer technology, yielding channel-to-channel matching within 2 ns and isolating each die pair with reinforced insulation per UL/VDE/CQC recognition. The 75 kV/us CMTI ensures robust data integrity in noisy environments with high dV/dt events such as IGBT/MOSFET gate-driver loops and switch-mode power stages. Typical applications include isolated SPI/UART interfaces between MCU and power-converter primary/secondary stages, isolated gate-drive signaling, industrial fieldbus (RS-485, CAN) isolation, medical equipment patient-isolated data links, and PLC/DCS analog/digital front-end isolation. Design consideration: ensure that supply pins on each side of the barrier are bypassed with 0.1 uF low-ESR ceramic capacitors placed within 2 mm of the VDD pins, and route logic traces as 50 ohm microstrip or stripline where possible. Note that the "-RL7" suffix denotes reel packaging; pinout and electrical behavior are identical to the ADUM151N0BRZ tube-packed version. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.

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ADUM2210SRWZ - 5kV 2-Ch 1Mbps Digital Isolator | Analog Devices
ADUM2210SRWZ

ADUM2210SRWZ - 5kV 2-Ch 1Mbps Digital Isolator | Analog Devices

The Analog Devices ADUM2210SRWZ is a 2-channel digital isolator based on ADI's proprietary iCoupler technology, delivering 5000 Vrms isolation with 1 Mbps data rate per channel in a 16-pin wide-body SOIC (RW-16) package. It combines high-speed CMOS with monolithic air-core transformer technology, supporting 25 kV/us common-mode transient immunity (CMTI) and operating from 3.0 V to 5.5 V on either side of the isolation barrier. A digital isolator is a semiconductor device that transmits data or power across an electrical isolation barrier while blocking high voltages, ground loops, and noise. Digital isolators sit hierarchically above optocouplers in the signal isolation category, providing faster data rates, lower power consumption, and tighter channel-to-channel timing. As members of the iCoupler family, ADUM2210 devices use on-chip transformers to magnetically couple data across the isolation barrier, replacing legacy LED-and-photodiode optocouplers in most new designs. Key features include a typical propagation delay of 20 ns, channel-to-channel matching of 1 ns, low dynamic power consumption of 1.6 mA per channel at 1 Mbps, and IEC 61000-4-x enhanced system-level ESD performance. The wide-body SOIC-16 package provides the reinforced 5 kVrms isolation and is rated for industrial temperature ranges of -40C to +125C. Two speed options (1 Mbps grade ADuM2210 / 25 Mbps grade ADuM2211) let designers balance speed and EMI. The ADUM2210SRWZ utilizes ADI's proprietary transformer-on-CMOS process, integrating the isolation barrier, refresh circuitry, and encoder/decoder logic on a single monolithic die. Each channel contains a differential transformer winding driven by edge-detection circuitry, providing DC-correctness without continuous carrier signal and yielding low EMI. Default channel configuration is two channels in the same direction (see ADUM2211 for opposite-direction option). Typical applications include industrial field bus (RS-485, RS-232, CAN) isolation, motor drive gate driver signal isolation, microcontroller UART/SPI isolation, isolated power supply feedback, and medical equipment patient-isolation interfaces. The 5 kVrms rating suits 230 V mains and reinforced IEC 60950 / IEC 62368-1 system-level designs. When designing with this device, observe the layout rules of VCC1 and VCC2 bypass capacitors (0.1 uF ceramic placed within 2 mm of each supply pin). The device requires no external drivers or clock; place input signals through series resistors when driving long PCB traces to limit inrush current into the transformer windings. This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes that go beyond the manufacturer datasheet to accelerate isolation-IC selection.

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ADUM2250ARWZ - Hot-Swappable Dual I2C Isolator | Analog Devices
ADUM2250ARWZ

ADUM2250ARWZ - Hot-Swappable Dual I2C Isolator | Analog Devices

The ADUM2250ARWZ from Analog Devices is a hot-swappable, dual-channel I2C digital isolator with a 5 kVrms isolation rating. It is designed to provide bidirectional, nonlatching communication channels that are compatible with I2C interfaces, eliminating the need to split I2C signals into separate transmit and receive paths for use with optocouplers. The device supports data rates up to 1 Mbps and features a common-mode transient immunity (CMTI) of 25 kV/µs, ensuring robust performance in noisy industrial environments. It operates from a 3.0 V to 5.5 V supply and can sink up to 30 mA on its open-drain outputs, making it suitable for driving multiple I2C devices. A digital isolator is a component that provides electrical isolation between two circuits while allowing digital signals to pass across the isolation barrier. In the context of I2C, the ADuM2250 integrates two bidirectional channels, each using a proprietary iCoupler technology that combines high-speed CMOS and monolithic transformer isolation. This approach offers advantages over optocouplers, including higher data rates, lower power consumption, and better reliability. The ADuM2250 is part of the broader family of digital isolators, which are essential in systems requiring galvanic isolation for safety, noise immunity, or ground loop elimination. Key features of the ADUM2250ARWZ include its hot-swap capability, which allows insertion or removal of the device without disrupting the I2C bus, and its compatibility with both 3.3 V and 5 V logic levels. The device is available in a 16-lead SOIC-W package (0.295" width, 7.50 mm) and is specified for operation over the industrial temperature range of -40°C to +125°C. The ADuM2250 also features a low propagation delay and supports multi-drop configurations, making it ideal for isolated I2C buses in systems with multiple slaves. Technically, the ADuM2250 uses Analog Devices' iCoupler technology, which employs chip-scale transformers to transmit data across the isolation barrier. This results in a compact, reliable solution with high isolation voltage and low electromagnetic interference. The device includes an internal oscillator and a refresh mechanism to maintain output states during periods of no data activity, ensuring that the I2C bus remains stable. The hot-swap feature is implemented through a power-on reset and a controlled output enable, preventing glitches on the bus during power-up or removal. Typical applications for the ADUM2250ARWZ include isolated I2C buses in industrial automation, medical equipment, and power management systems. It is particularly useful in applications where ground potential differences exist between subsystems, such as in motor drives, solar inverters, and battery management systems. The device's high CMTI and 5 kV isolation make it suitable for harsh environments with high voltage transients. When designing with the ADUM2250ARWZ, it is important to ensure proper decoupling of the power supply pins with 0.1 µF capacitors placed close to the device. Additionally, the pull-up resistors on the I2C lines should be selected based on the bus capacitance and the desired data rate, as the device's open-drain outputs require external pull-ups. The hot-swap feature should be considered in the system design to avoid bus contention during power sequencing.

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ADUM2250ARWZ-RL7 - 5kV I2C Digital Isolator | Analog Devices
ADUM2250ARWZ-RL7

ADUM2250ARWZ-RL7 - 5kV I2C Digital Isolator | Analog Devices

The ADUM2250ARWZ-RL7 is a hot-swappable, dual-channel I2C digital isolator from Analog Devices, offering 5000 Vrms isolation in a 16-lead SOIC-W package. It integrates Analog Devices' iCoupler chip-scale transformer technology, providing bidirectional, non-latching communication channels compatible with I2C interfaces. This device supports data rates up to 1 Mbps, a common-mode transient immunity (CMTI) of 25 kV/µs, and operates from a 3.0 V to 5.5 V supply range. The ADuM2250 is designed for hot-swap applications, featuring open-drain interfaces and a 30 mA current sink capability, making it ideal for isolating I2C buses in industrial, medical, and automotive systems. A digital isolator is a component that provides galvanic isolation between two circuits while allowing digital signals to pass across the isolation barrier. Unlike optocouplers, which use light to transfer signals, iCoupler technology uses microscopic transformers to couple signals magnetically, offering advantages in speed, power consumption, and reliability. Digital isolators are essential in systems where ground potential differences, noise, or safety requirements demand isolation, such as in motor drives, power supplies, and communication interfaces. The ADuM2250 specifically addresses I2C isolation, a common challenge in multi-board systems where I2C buses need to cross isolation boundaries. Key features of the ADUM2250ARWZ-RL7 include its 5 kVrms isolation rating, which meets reinforced insulation requirements for many safety standards, and its 25 kV/µs CMTI, ensuring reliable operation in noisy industrial environments. The device supports hot-swap capability, allowing boards to be inserted or removed without disrupting the bus, and its open-drain outputs are compatible with standard I2C protocols. The 30 mA current sink capability enables driving multiple I2C devices on the isolated side, while the wide supply range accommodates various logic levels. Technically, the ADuM2250 uses a proprietary iCoupler architecture that combines high-speed CMOS and monolithic transformer technology. This results in low propagation delay and high data integrity, with a typical propagation delay of 100 ns and pulse width distortion of less than 10 ns. The device also features a refresh mechanism to maintain output states during static inputs, ensuring no data corruption. The 16-lead SOIC-W package provides a compact footprint with a 7.50 mm body width, suitable for space-constrained designs. Typical applications include isolating I2C buses in industrial control systems, medical equipment, and smart grid infrastructure. The ADuM2250 is also used in power management systems where isolation is required between control and power stages. Its hot-swap capability makes it ideal for redundant systems and hot-pluggable modules. When designing with this device, ensure proper PCB layout with adequate creepage and clearance distances for the 5 kV isolation rating. Place decoupling capacitors close to the VDD pins and follow the manufacturer's guidelines for isolation barrier spacing.

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ADUM2251ARWZ - Hot-Swappable Dual I2C Isolator, 5kV | Analog Devices
ADUM2251ARWZ

ADUM2251ARWZ - Hot-Swappable Dual I2C Isolator, 5kV | Analog Devices

The ADUM2251ARWZ from Analog Devices is a hot-swappable, dual-channel I2C digital isolator providing 5000Vrms isolation in a 16-lead SOIC-W package. It supports bidirectional I2C communication with open-drain interfaces, a 30 mA current sink capability, and a data rate of 1 Mbps. The device operates from a 3V to 5.5V supply and features 25kV/µs common-mode transient immunity (CMTI), making it suitable for industrial and automotive applications where robust isolation is required. A digital isolator is a component that provides electrical isolation between two circuits while allowing digital signals to pass. Unlike optocouplers, which use light to transfer signals, digital isolators use capacitive or magnetic coupling, offering higher speed, better reliability, and longer lifespan. The ADUM2251 is specifically designed for I2C interfaces, which are bidirectional and require special handling to avoid data corruption. It integrates the necessary level shifting and direction control, eliminating the need for external components. Key features include hot-swap capability, which allows the device to be inserted or removed from a live bus without causing glitches, and non-latching bidirectional channels that prevent bus lock-up. The 30 mA current sink capability ensures compatibility with standard I2C devices, while the 1 Mbps data rate supports fast-mode I2C. The wide supply range of 3V to 5.5V allows operation with both 3.3V and 5V logic levels. Technically, the ADUM2251 uses Analog Devices' iCoupler technology, which employs chip-scale transformers for isolation. This provides superior performance compared to optocouplers, including higher data rates, lower power consumption, and better temperature stability. The device also features a thermal shutdown protection and is rated for operation from -40°C to +105°C, making it suitable for harsh environments. Typical applications include isolated I2C buses in industrial automation, power supply monitoring, and medical equipment. It is also used in automotive systems for battery management and sensor interfaces. The ADUM2251's hot-swap feature is particularly valuable in redundant systems where boards are replaced without powering down. When designing with the ADUM2251, ensure proper decoupling with 0.1µF capacitors on both supply pins and place them close to the device. Also, consider the isolation barrier's creepage and clearance distances for the required isolation rating.

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ADUM2251ARWZ-RL7 - Hot-Swappable I2C Isolator 5kV | Analog Devices
ADUM2251ARWZ-RL7

ADUM2251ARWZ-RL7 - Hot-Swappable I2C Isolator 5kV | Analog Devices

The ADUM2251ARWZ-RL7 from Analog Devices is a hot-swappable digital isolator with non-latching, bidirectional communication channels compatible with I2C interfaces. It provides one bidirectional channel and one unidirectional channel, making it ideal for applications where a bidirectional clock is not required. The device is housed in a 16-lead SOIC-W (0.295", 7.50mm width) package and offers 5000Vrms isolation, 1Mbps data rate, and 25kV/µs common-mode transient immunity (CMTI). Digital isolators are components that transmit digital signals across an isolation barrier, providing galvanic isolation to protect circuits from high voltages, ground loops, and noise. They are essential in industrial, medical, and communication systems where safety and signal integrity are critical. The ADuM2251 uses Analog Devices' iCoupler technology, which employs chip-scale transformers to achieve isolation, offering advantages over optocouplers such as higher speed, lower power, and better reliability. Key features include hot swap circuitry to prevent data glitches when an unpowered card is inserted onto an active bus, non-latching bidirectional channels, and compatibility with I2C interfaces. The device operates over a wide supply voltage range and temperature range of -40°C to +105°C. It is RoHS compliant and supports 5kVrms isolation, making it suitable for harsh industrial environments. Technically, the ADuM2251 integrates the isolation barrier and I2C buffer functions in a single package, eliminating the need for external components. The hot swap feature ensures that the bus is not disturbed during card insertion, which is critical in hot-swappable systems. The device also includes power-on reset and bus release functions to ensure reliable startup. Typical applications include isolated I2C buses in industrial automation, medical equipment, and communication systems. It is also used in power supply monitoring, battery management, and any system requiring galvanic isolation for I2C signals. The wide temperature range and high CMTI make it suitable for motor drives and other noisy environments. When designing with the ADuM2251, ensure proper PCB layout with adequate creepage and clearance distances for the isolation barrier. Place decoupling capacitors close to the VDD pins and follow the recommended application circuit in the datasheet to achieve optimal performance.

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ADUM3150BRSZ - 6-Channel SPI Digital Isolator | Analog Devices
ADUM3150BRSZ

ADUM3150BRSZ - 6-Channel SPI Digital Isolator | Analog Devices

The ADUM3150BRSZ is a 6-channel SPIsolator digital isolator from Analog Devices, optimized for isolated serial peripheral interface (SPI) applications. It provides 3750 Vrms isolation with a data rate of 40 Mbps and a common-mode transient immunity (CMTI) of 25 kV/µs. The device is housed in a 20-lead SSOP package (0.209", 5.30mm width) and operates over a supply voltage range of 3.0 V to 5.5 V, with a recommended operating range of 4.5 V to 5.5 V for VDD1 and 3.0 V to 3.6 V for VDD2. The ADUM3150BRSZ is based on Analog Devices' iCoupler chip-scale transformer technology, which provides reliable isolation without the size, cost, and performance constraints of traditional optocouplers. A digital isolator is a device that transfers digital signals across an isolation barrier, providing galvanic isolation between two circuits to protect against voltage transients, ground loops, and noise. Digital isolators are essential in industrial automation, medical equipment, and communication systems where safety and signal integrity are critical. The ADUM3150BRSZ is specifically designed for SPI buses, which are widely used to connect microcontrollers to sensors, ADCs, DACs, and other peripherals. By isolating the SPI signals, the device enables safe communication between systems operating at different ground potentials. Key features of the ADUM3150BRSZ include six channels with a propagation delay of 14 ns and jitter of 1 ns, supporting SPI clock rates up to 17 MHz. The device also includes a delay clock channel that allows for 40 MHz SPI data transfers. The low propagation delay and jitter ensure high-speed, reliable data transmission, making it suitable for applications requiring precise timing. The device operates over a temperature range of -40°C to +125°C, ensuring robust performance in harsh environments. The ADUM3150BRSZ uses iCoupler technology, which employs chip-scale transformers to transmit data across the isolation barrier. This technology offers advantages over optocouplers, including higher data rates, lower power consumption, and better reliability. The device also features a 25 kV/µs CMTI, which ensures reliable operation in noisy industrial environments. The SSOP package is compact and suitable for space-constrained designs. Typical applications for the ADUM3150BRSZ include isolated SPI interfaces in industrial automation, motor control, and power conversion systems. It is also used in medical devices, where isolation is required for patient safety, and in communication systems to prevent ground loops. The device is ideal for applications where high-speed SPI communication and galvanic isolation are needed. When designing with the ADUM3150BRSZ, it is important to ensure proper power supply decoupling and to follow the recommended layout guidelines to maintain signal integrity. The device requires a minimum of 4.5 V on VDD1 and 3.0 V on VDD2 for reliable operation. Additionally, the input and output sides must be properly isolated to prevent voltage differentials that could exceed the absolute maximum ratings.

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ADUM3150BRSZ-RL7 - 6-Ch SPI Digital Isolator | Analog Devices
ADUM3150BRSZ-RL7

ADUM3150BRSZ-RL7 - 6-Ch SPI Digital Isolator | Analog Devices

The ADUM3150BRSZ-RL7 is a 6-channel SPIsolator digital isolator from Analog Devices, optimized for isolated serial peripheral interfaces (SPIs). It is based on the iCoupler chip-scale transformer technology, providing robust galvanic isolation up to 3750 Vrms. The device supports SPI clock rates up to 17 MHz with a low propagation delay of 14 ns and 1 ns jitter, ensuring high-speed, reliable data transfer across the isolation barrier. It comes in a 20-pin SSOP package (0.209", 5.30mm width) and is available in tape and reel packaging. A digital isolator is a component that provides electrical isolation between two circuits while allowing digital signals to pass through. It is essential in applications where ground potential differences, noise, or safety requirements demand isolation, such as in industrial automation, motor control, and medical equipment. Digital isolators replace optocouplers in many designs due to their higher speed, better reliability, and lower power consumption. The ADUM3150 is specifically designed for SPI buses, which are widely used in embedded systems to connect microcontrollers to sensors, ADCs, and other peripherals. Key features of the ADUM3150BRSZ-RL7 include 6 isolation channels, a data rate of 40 Mbps (as listed by DigiKey), and a common-mode transient immunity (CMTI) of 25 kV/µs. The device operates over a wide supply voltage range and offers low propagation delay and jitter, making it suitable for high-speed SPI communication. The integrated delay clock feature allows for precise timing control, which is critical in multi-slave SPI systems. Technically, the ADUM3150 uses iCoupler technology, which employs micro-transformers to transmit data across the isolation barrier. This approach provides superior performance compared to optocouplers, including higher data rates, lower power consumption, and better timing accuracy. The device also features a refresh mechanism to maintain output states in the absence of input transitions, ensuring reliable operation in static conditions. Typical applications include isolated SPI interfaces in industrial PLCs, motor drives, solar inverters, and medical monitoring equipment. The high CMTI and isolation rating make it ideal for noisy industrial environments where voltage transients are common. The low propagation delay ensures minimal latency in real-time control loops. When designing with the ADUM3150, it is important to ensure proper PCB layout to minimize coupling between the isolated sides. The datasheet recommends keeping the isolation barrier clear of copper and using appropriate creepage distances. Additionally, decoupling capacitors should be placed close to the power pins to maintain stable operation.

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