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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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
ADUM3151BRSZ - 7-Ch SPI Digital Isolator | Analog Devices
The ADUM3151BRSZ is a 7-channel, SPIsolator digital isolator from Analog Devices, optimized for isolated serial peripheral interface (SPI) applications. It provides 3750 Vrms isolation with a maximum data rate of 34 Mbps and a common-mode transient immunity (CMTI) of 25 kV/µs. The device is housed in a 20-pin SSOP package (0.209" width, 5.30 mm) and operates from a 3 V to 5.5 V supply. 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. The ADUM3151BRSZ uses Analog Devices' iCoupler chip-scale transformer technology, which offers superior performance compared to optocouplers in terms of speed, power consumption, and reliability. Key features include low propagation delay of 14 ns on the CLK, MO/SI, MI/SO, and SS channels, supporting SPI clock rates up to 17 MHz. The device also features a 7-channel configuration with three forward channels and four reverse channels, making it ideal for full-duplex SPI communication. The high CMTI of 25 kV/µs ensures reliable operation in noisy industrial environments. The ADUM3151BRSZ is designed for isolated SPI interfaces in applications such as industrial automation, motor control, and data acquisition systems. Its low propagation delay and high data rate enable high-speed SPI communication across the isolation barrier without significant timing degradation. The device also includes an enable pin for power management and a thermal shutdown feature for protection. When designing with the ADUM3151BRSZ, ensure proper PCB layout with adequate creepage and clearance distances for the isolation rating. The device requires a bypass capacitor on both supply pins to maintain signal integrity. The SSOP-20 package is suitable for space-constrained designs, and the device is RoHS compliant.
ADUM3151BRSZ-RL7 - 7-Ch SPI Isolator 3.75kV | Analog Devices
The ADUM3151BRSZ-RL7 is a 7-channel, SPIsolator digital isolator from Analog Devices, optimized for isolated serial peripheral interfaces (SPIs). It is based on iCoupler chip-scale transformer technology, providing 3.75 kVrms isolation with a data rate of 34 Mbps and common-mode transient immunity of 25 kV/µs. The device is housed in a 20-lead SSOP package (0.209" width, 5.30 mm) and operates over a wide temperature range. A digital isolator is a component that provides electrical isolation between two circuits while allowing digital signals to pass. It uses capacitive, inductive, or optical coupling to transfer data without a direct electrical connection, protecting sensitive electronics from high voltages, ground loops, and noise. Digital isolators are essential in industrial automation, medical equipment, and communication systems where safety and signal integrity are critical. Key features include 7 channels with 5/2 input/output directionality, support for SPI clock rates up to 17 MHz, and low propagation delay of 14 ns on the CLK, MO/SI, MI/SO, and SS lines. The device also includes three auxiliary channels for non-timing-critical signals, and it operates from a 3.3V or 5V supply. The SSOP package is compact and suitable for space-constrained designs. The ADUM3151 uses iCoupler technology, which integrates micro-transformers on-chip to achieve isolation. This approach offers advantages over optocouplers, including higher data rates, lower power consumption, and better reliability. The device is designed to meet stringent isolation standards, ensuring robust performance in harsh environments. Typical applications include isolated SPI interfaces in industrial motor control, isolated sensor data acquisition, and isolated communication in medical devices. The high CMTI and low propagation delay make it ideal for systems requiring precise timing and noise immunity. When designing with this device, ensure proper PCB layout with adequate creepage and clearance distances for the isolation barrier. Also, place decoupling capacitors close to the power pins to minimize noise.
ADUM3152ARSZ - 7-Ch SPI Digital Isolator 3.75kV | ADI
The Analog Devices ADUM3152ARSZ is a 7-channel SPIsolator digital isolator rated at 3750 Vrms isolation with 25 kV/µs CMTI, housed in a 20-lead SSOP (5.30 mm body width) package. It supports SPI clock rates up to 17 MHz with 14 ns propagation delay on the four high-speed SPI signal channels (CLK, MO/SI, MI/SO, SS), and adds three 250 kbps auxiliary data channels for side-band signaling or control. A digital isolator is an IC that transfers logic signals across a galvanically isolated barrier using chip-scale transformers, capacitive coupling, or GMR structures rather than optocouplers or discrete transformers. The ADUM3152 belongs to the iCoupler family, which integrates on-chip transformers and CMOS logic to deliver DC-correct signal transfer, low propagation delay, and high common-mode transient immunity in a small surface-mount footprint — sitting within the broader power management and signal isolation hierarchy. Key features include 3.75 kVrms withstand voltage per UL 1577, 25 kV/µs minimum common-mode transient immunity (CMTI), 17 MHz SPI clock support, 14 ns typical propagation delay on SPI channels, and three additional 250 kbps slow channels. The part operates from 3 V to 5.5 V on both sides of the barrier with independent supply pins, supports -40 °C to +125 °C operation, and is qualified to AEC-Q100 for automotive SPI isolation. The architecture uses ADI's iCoupler chip-scale transformer technology with an oscillator/refresh circuit on each side of the isolation barrier. Differential signaling across the transformer rejects common-mode noise, allowing the part to ride through fast dV/dt transients typical in motor drive and inverter power stages without corrupting SPI data. Typical applications include isolated SPI interfaces for motor control gate drivers, industrial SPI peripherals and sensor readouts, battery management systems (BMS) and battery stack monitors, isolated ADC/DAC interfaces in data acquisition, and SPI-isolated communication for medical and industrial instrumentation. It is also used as a generic SPI isolator between a host MCU and a remote peripheral over a high-voltage barrier. When designing with this device, place 0.1 µF decoupling capacitors as close as possible to both VDD1 and VDD2 pins and keep the bypass loop area minimal to preserve CMTI margin. Ensure the PCB creepage and clearance on the SSOP body meet the target system-level isolation voltage and pollution degree requirements, and confirm that the slower 250 kbps auxiliary channels are not used for signals requiring >250 kbps. This page synthesizes distributor pricing, drop-in alternatives including same-brand and cross-brand options, and practical design notes that extend beyond the manufacturer datasheet.
ADUM3152BRSZ - 7-Ch 3.75kV SPI Digital Isolator | Analog Devices
The Analog Devices ADUM3152BRSZ is a 7-channel SPIsolator digital isolator rated at 3750 Vrms isolation, with 34 Mbps data rate and 25 kV/µs common-mode transient immunity (CMTI), housed in a 20-pin SSOP (5.30 mm width) package. It is optimized for isolated serial peripheral interface (SPI) communications and supports SPI clock rates up to 17 MHz with a typical propagation delay of 14 ns on the CLK, MO/SI, MI/SO, and SS bus signals. A digital isolator is a semiconductor device that transfers digital signals across an isolation barrier using chip-scale transformers, giant magnetoresistance (GMR), or capacitive coupling rather than optical means. The device category sits within the broader hierarchy: digital isolator -> galvanic isolator -> interface IC -> signal conditioning IC -> integrated circuit. Compared to legacy optocouplers, iCoupler technology delivers 10x-100x faster propagation delay, lower power consumption, tighter channel-to-channel matching, and no LED-degradation aging effects. Key features include 3.75 kVrms reinforced isolation per UL 1577, four high-speed SPI dedicated channels (CLK, MO/SI, MI/SO, SS) plus three low-speed auxiliary channels with 1/2 channel directionality, and 3.0 V to 5.5 V operation on both VDD1 and VDD2 supplies. The 25 kV/µs CMTI rating ensures signal integrity in noisy motor-drive and power-conversion environments where fast switching transients are common. The ADUM3152BRSZ uses Analog Devices' proprietary iCoupler chip-scale transformer technology to transmit data across the isolation barrier. An on-chip oscillator and refresh circuit regenerate clean edges on the secondary side, achieving channel-to-channel skew below 3 ns and jitter below 1 ns RMS. This timing precision is essential for SPI masters that rely on matched setup/hold windows across multiple slaves. Typical applications include isolated SPI interfaces for industrial motor drives, isolated data acquisition front-ends, isolated gate-driver signal paths for IGBT/MOSFET power stages, isolated sensor readouts in process control, and medical equipment patient-isolated data links. Designers also use it as a drop-in upgrade for older optocoupler-based SPI isolation where higher throughput is required. When designing with this part, place 0.1 µF ceramic bypass capacitors as close as possible to both VDD1 and VDD2 pins, and route the high-speed SPI traces as 50 Ω microstrip with ground reference intact on both sides of the barrier. Confirm that the auxiliary channel direction configuration (1-of-2 forward vs 2-of-1 reverse) matches your design before PCB layout is frozen. This page synthesizes distributor pricing snapshots, verified drop-in same-family alternatives, and practical design notes not consolidated on the manufacturer datasheet front page.
ADUM3152BRSZ-RL7 - 7-Ch SPI Isolator 3750Vrms | Analog Devices
The ADUM3152BRSZ-RL7 is a 7-channel SPIsolator digital isolator from Analog Devices, optimized for isolated serial peripheral interfaces (SPIs). It provides 3.75 kVrms isolation with a data rate of 34 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 the automotive temperature range of -40°C to +125°C. 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 separation between the controller and the isolated side. The ADuM3152 uses Analog Devices' iCoupler chip-scale transformer technology, which offers superior performance compared to optocouplers in terms of speed, power consumption, and reliability. Key features include support for SPI clock rates up to 17 MHz, low propagation delay of 14 ns on the CLK, MO/SI, MI/SO, and SS channels, and a 25 kV/µs CMTI for robust operation in noisy industrial environments. The device also features 1/2 auxiliary channel directionality, allowing flexible configuration for additional signals. The 20-pin SSOP package is compact and suitable for space-constrained designs. The ADuM3152 is based on iCoupler technology, which uses micro-transformers to transfer data across the isolation barrier. This architecture provides high-speed operation with low power consumption and excellent timing accuracy. The device is designed to meet the stringent requirements of industrial automation, motor control, and isolated SPI communication in power systems. Typical applications include isolated SPI interfaces in industrial PLCs, motor drives, solar inverters, and medical equipment. The high CMTI and wide temperature range make it suitable for automotive and harsh industrial environments. The device is also used in isolated sensor interfaces and data acquisition systems where ground loops must be eliminated. When designing with the ADuM3152, ensure proper PCB layout to minimize coupling across the isolation barrier. Follow the manufacturer's guidelines for creepage and clearance distances to maintain the rated isolation voltage. The device requires a 5V supply on both sides (VDD1 and VDD2) and supports 3.3V logic levels with appropriate supply connections.
ADUM3153ARSZ - 7-Ch SPI Isolator, 3.75kVrms, 17MHz | ADI
The Analog Devices ADUM3153ARSZ is a 7-channel SPIsolator digital isolator optimized for isolated serial peripheral interfaces (SPI), housed in a 20-pin SSOP package (5.30 mm body width). It provides 3750 Vrms isolation with 25 kV/µs common-mode transient immunity (CMTI) and supports SPI clock rates up to 17 MHz through 14 ns low propagation delay across the CLK, MO/SI, MI/SO, and SS SPI bus signals. A digital isolator is a semiconductor device that transfers logic-level signals across a galvanic isolation barrier using chip-scale transformers (iCoupler technology), optocouplers, or capacitive coupling, while blocking high voltage DC and transient common-mode events. Within the power management and signal chain hierarchy, digital isolators sit between interface ICs and discrete optocouplers, replacing legacy optocouplers in industrial, medical, and renewable energy systems where board space, speed, and CMTI matter more than absolute lowest cost. Key features of the ADUM3153ARSZ include three isolated data channels (up to 17 MHz), four additional slower auxiliary channels for handshake and control, integrated transformer coils that eliminate external gate drivers, and 8 mm creepage/clearance on the 20-SSOP wide-body package. The chip scale transformer technology eliminates the LED degradation and current-transfer-ratio (CTR) drift that limit optocoupler lifetimes. Architecturally, the ADUM3153 family uses Analog Devices' iCoupler chip-scale transformer technology. The CLK, MO/SI, MI/SO, and SS data channels are designed for matched low propagation delay (14 ns typical), while three auxiliary channels support the SPI handshake (chip select, busy, interrupt) at lower data rates. Power-on default output state is low; VDD1 and VDD2 supply ranges are independently 3.0 V to 5.5 V. Typical applications include isolated SPI interfaces to gate drivers and power modules in industrial motor drives and solar inverters, isolated ADC front ends for power metering and instrumentation, SPI-isolated communication to DSPs and microcontrollers in medical patient monitors, and SPI bus extension across 5 kV reinforced isolation barriers in PLC and process control I/O modules. When designing with this device, ensure VDD1 and VDD2 bypass capacitors (0.1 µF ceramic minimum) are placed within 2 mm of each supply pin, and that PCB creepage meets the end-equipment reinforced insulation standard (typically 8 mm). The device does not require external clock generation or pull-up resistors, simplifying layout versus discrete optocoupler solutions. This page synthesizes distributor pricing, drop-in alternatives from the same ADuM315x family and competitor isolators, and practical PCB layout notes not found in the manufacturer datasheet, helping engineers select the right 7-channel SPI isolator for high-voltage industrial designs.
ADUM3153BRSZ - 7Ch SPI Iso 3.75kV | Analog Devices
The ADUM3153BRSZ is a 7-channel, SPIsolator digital isolator from Analog Devices optimized for isolated serial peripheral interfaces (SPIs). It is rated for 3750Vrms isolation, supports data rates up to 34Mbps, and offers 25kV/us common-mode transient immunity (CMTI). The device is housed in a 20-SSOP (0.209", 5.30mm width) package and is designed to isolate SPI signal lines while maintaining high-speed communication. A digital isolator is a component that transfers digital signals across an isolation barrier, protecting sensitive circuitry from high voltages, ground loops, and noise. In a typical system hierarchy, a digital isolator is part of the interface IC category, sitting between a controller and a peripheral or field-side device. The ADuM3153 uses Analog Devices iCoupler chip-scale transformer technology, which provides signal isolation with lower power and higher reliability than traditional optocouplers while enabling higher data rates. Key features of the ADUM3153BRSZ include 7 isolated channels (4 SPI signals: CLK, MO/SI, MI/SO, SS, plus 3 auxiliary channels with 0 forward/3 reverse directionality), a 14ns propagation delay, and support for SPI clock rates up to 17MHz. The 34Mbps data rate and 25kV/us CMTI make the device robust in noisy industrial environments where high-voltage switching transients are common. The ADuM315x family leverages iCoupler technology, which uses chip-scale micro-transformers rather than LEDs and photodiodes. This approach results in tighter propagation delay matching, higher data rates, and better reliability over temperature. The 20-SSOP package with 5.30mm width provides a compact footprint while allowing sufficient creepage and clearance for basic or reinforced isolation applications. Typical applications include isolated SPI interfaces in motor drives, programmable logic controllers (PLCs), solar inverters, medical monitoring equipment, and isolated data acquisition systems. The 0/3 auxiliary channel directionality is especially useful when the isolated side must send multiple status, interrupt, or control signals back to the controller. When designing with the ADUM3153BRSZ, pay careful attention to power supply bypassing on both sides of the isolation barrier, as well as PCB layout to maintain isolation spacing. Verify the auxiliary channel directionality matches your application, and consult the ADuM3151/ADuM3152/ADuM3153 datasheet for detailed pinout and recommended layout guidelines.
ADUM3153BRSZ-RL7 - 7-Ch SPI Digital Isolator | Analog Devices
The ADUM3153BRSZ-RL7 is a 7-channel, SPIsolator™ digital isolator from Analog Devices, optimized for isolated serial peripheral interfaces (SPIs). It provides 3750Vrms isolation with a data rate of 34Mbps and a common-mode transient immunity (CMTI) of 25kV/µs. The device is housed in a 20-pin SSOP package (0.209", 5.30mm width) and is available in tape and reel packaging. Digital isolators are components that transfer 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, medical, and communication systems where safety and signal integrity are critical. The ADUM3153BRSZ-RL7 uses Analog Devices' iCoupler® chip-scale transformer technology, which offers superior performance compared to optocouplers, including higher data rates, lower power consumption, and better reliability. Key features include 7 channels with 0/3 auxiliary channel directionality, supporting SPI clock rates up to 17 MHz with a low propagation delay of 14 ns. The device operates over a wide supply voltage range and features same-direction timing matching, ensuring synchronized data transmission. The 34Mbps data rate and 25kV/µs CMTI make it suitable for high-speed, noisy environments. The ADUM3153BRSZ-RL7 is designed for isolated SPI communication in applications such as motor control, industrial automation, and isolated sensor interfaces. Its low propagation delay and high CMTI ensure reliable data transfer in harsh industrial settings. The device also includes an enable pin for power management and supports a wide temperature range of -40°C to +125°C. When designing with this isolator, ensure proper PCB layout with adequate creepage and clearance distances to maintain isolation ratings. The device requires a bypass capacitor on both supply pins to ensure stable operation. The ADUM3153BRSZ-RL7 is RoHS compliant and lead-free, making it suitable for environmentally conscious designs.
ADUM3154ARSZ - 3.75 kV SPI Isolator, 4 ch, 2 Mbps | Analog Devices
The Analog Devices ADUM3154ARSZ is a 3.75 kV rms, 7-channel SPIsolator digital isolator optimized for SPI interfaces, housed in a 20-pin SSOP (RS-20) package with 0.209" (5.30 mm) body width. It delivers a maximum data rate of 2 Mbps across its four high-speed data channels and supports a common-mode transient immunity (CMTI) of 25 kV/µs. The device uses Analog Devices' proprietary iCoupler technology, replacing optocouplers to remove the cost, size, power, performance, and reliability penalties of LED-based isolation. A digital isolator is a semiconductor device that transfers data across an isolation barrier using chip-scale transformers or capacitive coupling rather than an optical path. Digital isolators belong to the broader category of signal isolation ICs, sitting hierarchically between galvanic isolators and interface ICs in a system. The iCoupler family is the de-facto standard for high-speed, multi-channel SPI isolation in noise-sensitive industrial systems. Key features of the ADUM3154ARSZ include 4 high-speed SPI channels (MOSI, MISO, SCLK, SS), a low-speed 250 kbps two-wire bus to multiplex up to four SPI slaves, integrated subordinate-select demultiplexing, low propagation delay suitable for full-speed SPI timing, 3.75 kV rms reinforced isolation per UL/VDE, and 25 kV/µs minimum CMTI. The device operates from a wide supply range and provides CMOS-compatible logic levels on both sides of the barrier. Internally, the ADUM3154ARSZ combines four high-speed iCoupler channels for SPI signals with two additional low-speed channels dedicated to the 4-to-1 slave-select multiplexer. The high-speed channels support clock rates up to 2 MHz, while the low-speed address bus operates at 250 kbps to encode the active slave selection. On-chip ESD protection and tight channel-to-channel matching simplify PCB layout and reduce firmware burden. Typical applications include isolated SPI communication for industrial PLCs, motor-control gate drivers, isolated ADC/DAC SPI ports, battery-management systems (BMS), solar inverter control boards, and any SPI peripheral that must cross a high-voltage safety barrier. It is particularly well suited to industrial 24 V systems where reinforced isolation and high CMTI are mandatory. When designing with this part, pair the high-speed SPI side with a low-impedance local decoupling network (typically 100 nF + 10 µF) on both VDD1 and VDD2, and observe 4 mm minimum creepage across the barrier. The slave-select multiplexer requires the controller to drive the 250 kbps address bus during chip-select transitions; firmware must respect the multiplexer settling time. This page consolidates ADiMS real distributor pricing, drop-in alternatives in the same 20-SSOP footprint, and practical PCB/EMC design notes beyond the manufacturer datasheet summary.
ADUM3154BRSZ - 3.75kV SPI Digital Isolator | Analog Devices
The ADUM3154BRSZ is a 7-channel SPI digital isolator from Analog Devices, designed to provide galvanic isolation for serial peripheral interface (SPI) buses. It supports SPI clock rates up to 17 MHz and data rates up to 34 Mbps, with a withstand voltage of 3750 Vrms. The device is housed in a 20-lead SSOP package (0.209" width, 5.30mm) and operates over a temperature range of -40°C to +125°C. 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 separation. The ADUM3154BRSZ uses Analog Devices' iCoupler chip-scale transformer technology, which offers advantages over optocouplers in terms of speed, power consumption, and reliability. Key features include a common-mode transient immunity (CMTI) of 25 kV/µs, low propagation delay and jitter, and support for up to four slave devices. The device integrates multiple isolation channels for SPI signals (CLK, MO/SI, MI/SO, SS) and additional control channels, simplifying system design. It operates from two supply voltages: VDD1 (3.0V to 3.6V) and VDD2 (4.5V to 5.5V), allowing level shifting between different logic domains. The ADUM3154BRSZ is part of the ADuM315x family, which includes variants with different channel configurations and isolation ratings. The device is production-ready and available in tape and reel packaging. It is RoHS compliant and suitable for industrial, medical, and communication applications where reliable isolation is critical. Typical applications include isolated SPI interfaces in motor control, data acquisition systems, and industrial automation. The device's high CMTI ensures reliable operation in noisy environments, and its low propagation delay supports high-speed SPI communication. When designing with this device, proper PCB layout is essential to maintain isolation performance and minimize coupling between the two sides.