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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.
ADUM3154BRSZ-RL7 - SPI Digital Isolator 3750Vrms | Analog Devices
The ADUM3154BRSZ-RL7 is a 3.75 kV, 7-channel SPIsolator digital isolator from Analog Devices, optimized for serial peripheral interface (SPI) applications. It supports up to four subordinate devices and is based on the iCoupler chip-scale transformer technology. The device provides low propagation delay and jitter in the CLK, MO/SI, MI/SO, and SS SPI bus signals, supporting SPI clock rates up to 17 MHz. It is available in a 20-lead SSOP package (0.209", 5.30mm width) and operates over a 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 used to protect sensitive electronics from high voltages, ground loops, and noise, and is essential 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 includes optocouplers and magnetic isolators. Key features of the ADUM3154BRSZ-RL7 include a 3750Vrms isolation rating, 4 forward channels and 3 reverse channels, a data rate of 34 Mbps, and a common-mode transient immunity (CMTI) of 25 kV/µs. The device operates with a supply voltage range of 3.0V to 3.6V on VDD1 and 4.5V to 5.5V on VDD2, ensuring compatibility with standard logic levels. The low propagation delay and jitter make it ideal for high-speed SPI communication. The ADUM3154BRSZ-RL7 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 multiple-slave SPI configuration, allowing it to interface with up to four SPI slave devices without additional components. Typical applications include isolated SPI interfaces in industrial automation, motor control, data acquisition systems, and medical equipment. The device is also suitable for use in communication systems where galvanic isolation is required to protect against voltage transients and ground potential differences. When designing with this device, it is important to ensure proper PCB layout to minimize coupling across the isolation barrier. The datasheet recommends that any coupling that occurs should affect all pins equally on a given component side to prevent voltage differentials that could exceed absolute maximum ratings.
ADUM3155BRSZ - 7-Channel SPI Digital Isolator | Analog Devices
The ADUM3155BRSZ is a 7-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 3.75 kVrms isolation with a 25 kV/µs common-mode transient immunity (CMTI). The device supports SPI clock rates up to 17 MHz with a low propagation delay of 14 ns, making it ideal for high-speed isolated data acquisition and control systems. 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 peripheral. Digital isolators are part of the broader category of isolation components, which also include optocouplers and magnetic isolators, and are widely used in industrial automation, medical equipment, and power electronics. The ADUM3155BRSZ features seven channels with a specific configuration: three forward channels (CLK, MO/SI, SS) and two reverse channels (MI/SO), plus two additional channels for general-purpose use. It operates from a 3.0V to 5.5V supply on both sides, with a maximum data rate of 34 Mbps. The device is available in a 20-lead SSOP package (0.209" width, 5.30mm) and is specified for the industrial temperature range of -40°C to +125°C. Key features include a 3.75 kVrms isolation voltage, 25 kV/µs CMTI, 14 ns propagation delay, and 34 Mbps data rate. The device also offers a 2.5V to 5.5V logic supply range, making it compatible with a wide variety of microcontrollers and FPGAs. The iCoupler technology ensures reliable operation in harsh environments, with no wear-out mechanism, unlike optocouplers. Typical applications include isolated SPI interfaces in industrial motor drives, isolated sensor data acquisition, isolated ADC/DAC interfaces, and isolated communication in medical and instrumentation systems. The high CMTI and low propagation delay make it suitable for high-speed, noise-prone environments. When designing with the ADUM3155BRSZ, ensure proper power supply decoupling on both sides with 0.1 µF capacitors close to the VDD pins. The input and output sides must have separate ground planes to maintain isolation integrity. The device is RoHS compliant and lead-free.
ADUM3155BRSZ-RL7 - 7-Channel SPI Isolator 3750Vrms | Analog Devices
The ADUM3155BRSZ-RL7 is a 7-channel, SPIsolator digital isolator from Analog Devices, optimized for isolated serial peripheral interfaces (SPIs). 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-lead SSOP package (0.209" width, 5.30 mm) and operates over the industrial 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 isolation. The ADUM3155BRSZ-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 a 34 Mbps data rate, 14 ns propagation delay, and 25 kV/µs CMTI, making it suitable for high-speed SPI communication in noisy industrial environments. The device supports 5 V operation on both sides (VDD1 and VDD2) and is available in a tape-and-reel package (RL7 suffix) for automated assembly. The ADUM3155BRSZ-RL7 is part of the ADuM315x family, which includes ADuM3151, ADuM3152, and ADuM3153 variants. These devices are designed to isolate SPI buses, providing low propagation delay and high data integrity. The iCoupler technology integrates micro-transformers and high-speed CMOS circuits, ensuring robust isolation and signal integrity. Typical applications include isolated SPI interfaces in industrial automation, motor control, data acquisition systems, and medical equipment. The device is also used in isolated power supplies and communication interfaces where ground loop isolation is critical. When designing with this device, ensure proper PCB layout to maintain isolation spacing and minimize parasitic capacitance. The SSOP package requires careful soldering to avoid thermal stress. For high-speed operation, keep traces short and use proper termination to maintain signal integrity.
ADUM3160BRWZ - USB Digital Isolator 2.5kV, 12Mbps | Analog Devices
Analog Devices ADuM3160BRWZ is a USB port isolator built on iCoupler technology, providing 2500 Vrms galvanic isolation for full-speed and low-speed USB signals. It supports data rates up to 12 Mbps and offers 25 kV/µs common-mode transient immunity (CMTI) in a 16-SOIC (7.50 mm wide) package. A digital isolator is a component that transfers digital signals between circuits while preventing DC current flow and allowing different ground potentials. A USB digital isolator specifically isolates the D+ and D− lines of a USB port so that a host and peripheral can communicate without sharing a ground, eliminating ground loops and protecting against voltage transients. This type of component sits between the USB controller and the connector in the signal chain, preserving USB protocol behavior. Key features include 2500 Vrms isolation rating, 12 Mbps data rate, 25 kV/µs CMTI, and support for full-speed and low-speed USB devices. The monolithic air core transformer technology rejects high-speed common-mode noise better than optocouplers and provides stable performance over temperature. The wide SOIC-16 package allows easy PCB routing and is suitable for space-constrained boards. Architecturally, the ADuM3160 combines high-speed CMOS logic with micro-transformers on-chip, eliminating the need for external high-voltage isolation components. The device buffers and re-times D+ and D−, making it transparent to the USB host and peripheral. Because it isolates only the USB data lines, an isolated supply and VBUS management are still required on each side. Typical applications include medical patient-monitoring USB interfaces, industrial PLC programming ports, isolated data acquisition systems, USB DACs, and test instrumentation. The 12 Mbps throughput supports USB 1.1 and USB 2.0 full-speed operation, which covers most HID, CDC, and audio class devices. When designing with the ADuM3160, maintain proper supply decoupling on VDD1 and VDD2, keep the D+/D− traces impedance-controlled, and provide an isolated DC-DC supply to the secondary side. Verify that the total barrier capacitance meets the isolation requirements of the target safety standard.
ADUM3160BRWZ-R - 2.5kV USB Digital Isolator, 12Mbps | Analog Devices
The Analog Devices ADUM3160BRWZ-R is a USB port isolator based on iCoupler technology, providing 2500 Vrms isolation with 12 Mbps full-speed USB signaling in a 16-pin SOIC-W (RW) wide-body package. It combines high-speed CMOS with monolithic air-core transformer technology to deliver robust galvanic isolation between upstream USB host and downstream peripheral devices, supporting both low-speed (1.5 Mbps) and full-speed (12 Mbps) USB operation while remaining USB 2.0 compatible. The -R suffix denotes the tape-and-reel packaging option. A USB digital isolator is a specialized galvanic isolation component that breaks the electrical ground connection between a USB host (PC, hub, or embedded controller) and a USB peripheral, while transparently passing the differential D+/D- data lines and providing isolated VBUS power. ADUM3160BRWZ-R belongs to the digital isolator IC family within interface ICs, sitting hierarchically under USB isolators > digital isolators > interface ICs > integrated circuits. This category is critical in medical, industrial, and test equipment where USB grounds create ground loops or expose sensitive downstream circuitry to fault voltages. Key features include 2500 Vrms reinforced isolation per UL 1577, 25 kV/us minimum common-mode transient immunity (CMTI), and 7 mA maximum upstream supply current at 1.5 Mbps with 8 mA at 12 Mbps. Operating from a 3.0 V to 5.5 V supply on the upstream side, the device draws minimal quiescent current and provides enhanced system-level ESD performance per IEC 61000-4-x. The wide-body SOIC-16 package offers 8 mm creepage/clearance for high-voltage safety compliance, far exceeding standard SOIC-8 isolators. Internal air-core transformers handle signal isolation, replacing optocouplers with higher bandwidth, lower power consumption, and superior CMTI performance. Typical applications span isolated USB peripherals, medical device USB ports (patient-connected equipment requiring 2500 V isolation), industrial USB data acquisition modules, USB-to-UART bridges with ground isolation, and test & measurement instruments where USB ground loops would corrupt measurements. Compared with optocoupler-based USB isolation schemes that require separate D+/D- isolators plus discrete drivers, the ADUM3160 integrates the complete USB isolation channel into a single chip, simplifying BOM and PCB layout. When designing with this part, place 0.1 uF bypass capacitors on both VDDP and VDD3.3 pins within 2 mm of the device. Verify that the application requires only low or full-speed USB - this device is NOT rated for 480 Mbps high-speed USB; for HighSpeed isolation consider ADUM3161 or external solutions. Maintain proper creepage distance on PCB and avoid routing signal traces beneath the package to preserve 2500 Vrms isolation integrity.
ADUM3160BRWZ-RL - 2.5kV USB Digital Isolator 12Mbps SOIC-16 | Analog Devices
The Analog Devices ADUM3160BRWZ-RL is a 2.5 kV rms USB digital isolator based on Analog Devices iCoupler technology, supporting low-speed (1.5 Mbps) and full-speed (12 Mbps) USB signalling in a 16-pin SOIC-W (RW-16) wide-body surface-mount package. It integrates high-speed CMOS with monolithic air-core transformers to provide reinforced galvanic isolation across the USB D+/D- data pair, eliminating ground loops while preserving USB plug-and-play enumeration. The device operates with a working withstand voltage of 2.5 kV rms, common-mode transient immunity (CMTI) of 25 kV/us microsecond minimum, and draws typical quiescent current in the single-digit milliamp range from both VBUS1 and VBUS2 rails. A digital isolator is a device that transfers logic signals across a galvanically-isolated barrier using an internal chip-scale transformer, capacitive, or optical coupler. Within the broader IC taxonomy, the ADUM3160 occupies the digital isolator subcategory of interface ICs, which themselves sit under the power-management-and-isolation umbrella used in safety-critical systems. Unlike a generic multi-channel isolator, the ADUM3160 implements the USB-specific pull-up/pull-down and speed-selection logic required by the USB 1.1 specification, allowing it to transparently appear as a peripheral or directly to upstream port without host-side firmware changes. Key features include transparent USB 1.1 full/low-speed signalling, hardwired speed selection through dedicated SPD pin logic, integrated upstream/downstream pull-up and pull-down resistors matched to the USB electrical layer, and creep-supplied dual-side power domains that allow the host and device sides to operate from independently regulated 5 V or 3.3 V rails. These features allow drop-in insertion into existing USB-1.1-compliant PCB footprints without external logic translation. The 16-lead SOIC-W package provides a minimum 8 mm creepage distance along the package body, supporting the 2.5 kV rms isolation rating certified to UL, VDE, and IEC 61010-1 reinforced-insulation standards. Typical applications include isolated USB ports in industrial process control and factory automation, medical-device USB data acquisition with patient-protection isolation, USB-to-host isolation for test-and-measurement instrumentation, and isolated programming/debug interfaces for embedded targets operating in high-noise industrial environments. The wide-body SOIC package also supports 5 kV reinforced isolation variants in the ADUM3160 family by way of the ADuM3160/ADuM3161 derivatives. When designing with this device, place ferrite beads on VBUS1 and VBUS2 rails to suppress common-mode current noise on the upstream and downstream power domains, and observe the minimum 8 mm PCB creepage distance between the host-side and peripheral-side ground planes. The SPD pin must be hardwired to VBUS4 or GND to select full-speed or low-speed mode respectively; it cannot be changed dynamically after enumeration.
ADUM3161BRWZ - USB Digital Isolator 2.5kV | Analog Devices
The ADUM3161BRWZ is a USB digital isolator from Analog Devices, based on iCoupler technology. It provides galvanic isolation for USB signals, supporting full-speed (12 Mbps) and low-speed (1.5 Mbps) data rates. The device is housed in a 16-lead SOIC-W (wide body) package and offers 2.5 kVrms isolation voltage, making it suitable for applications requiring robust isolation between USB ports and host controllers. A USB digital isolator is a component that provides electrical isolation between a USB interface and the rest of the system, preventing ground loops, noise, and voltage spikes from damaging sensitive electronics. It uses magnetic or capacitive coupling to transfer data across an isolation barrier, ensuring signal integrity while maintaining safety. In the hierarchy of isolation components, a USB isolator is a specialized type of digital isolator, which falls under the broader category of interface ICs, which are part of integrated circuits. Key features of the ADUM3161BRWZ include a data rate of 12 Mbps (full-speed USB), 2.5 kVrms isolation voltage, and a common-mode transient immunity (CMTI) of 25 kV/µs. The device operates from a 3.0V to 5.5V supply on both sides, allowing flexible integration with various USB controllers. It also features an integrated DC-to-DC converter, eliminating the need for an external isolated power supply, which simplifies design and reduces component count. Technically, the ADUM3161BRWZ uses Analog Devices' iCoupler technology, which combines high-speed CMOS and monolithic air core transformers to achieve reliable isolation. The device provides two isolation channels: one for upstream data (D+ and D-) and one for downstream control signals. It also includes an integrated oscillator and rectifier to generate an isolated supply, ensuring proper operation without external power components. Typical applications include USB isolation in medical devices, industrial automation, and test equipment, where safety and noise immunity are critical. The device is also used in USB hubs and peripheral devices to prevent ground loops and protect against electrostatic discharge (ESD). When designing with the ADUM3161BRWZ, ensure proper PCB layout with adequate spacing between the isolated and non-isolated grounds. Place decoupling capacitors close to the VDD pins on both sides to minimize noise. The device is RoHS compliant and available in tape and reel packaging.
ADUM3161BRWZ-RL7 - 6-Ch Digital Isolator 150Mbps | Analog Devices
The ADUM3161BRWZ-RL7 is a 6-channel digital isolator from Analog Devices, based on iCoupler technology. It provides galvanic isolation up to 3000Vrms and supports data rates up to 150Mbps with a common-mode transient immunity (CMTI) of 75kV/µs. The device is housed in a 16-lead SOIC-W package (0.295" width) and operates over a supply voltage range of 1.7V to 5.5V on both sides, making it suitable for low-voltage and mixed-voltage systems. 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 ADUM3161BRWZ-RL7 uses monolithic air core transformers and CMOS technology, offering superior performance compared to optocouplers, including higher speed, lower power consumption, and better reliability. Key features include 6 independent isolation channels with a channel configuration of 5 forward and 1 reverse, a wide supply range of 1.7V to 5.5V, and a high data rate of 150Mbps. The device also features a CMTI of 75kV/µs, ensuring robust operation in noisy industrial environments. The SOIC-16 package provides a compact footprint for space-constrained designs. The ADUM3161BRWZ-RL7 is designed for use in industrial automation, motor control, and isolated communication interfaces. Its high-speed capability makes it ideal for SPI, UART, and other serial protocols requiring fast data transfer. The device is also suitable for medical equipment where patient isolation is critical. When designing with this isolator, ensure proper PCB layout with adequate creepage and clearance distances to maintain isolation ratings. Bypass capacitors should be placed close to the VDD pins to minimize noise. The device is RoHS compliant and operates over a temperature range of -40°C to +125°C.
ADUM3201ARZ - Dual-Channel Digital Isolator, 1Mbps, 2.5kV | Analog Devices
The Analog Devices ADUM3201ARZ is a dual-channel digital isolator based on ADI's proprietary iCoupler technology, delivering 1Mbps data throughput, 2.5kVrms isolation, and 25kV/us common-mode transient immunity (CMTI) in an 8-pin SOIC (3.90mm body width) package. The RZ suffix denotes the wide-body SOIC-8 variant that is pin-for-pin compatible with most 8-pin optocouplers and competing digital isolators. Operating supply range is 2.7V to 5.5V on each side of the barrier with independent channel-by-channel configuration. The iCoupler architecture replaces LED/photodiode optocoupler structures with on-chip CMOS and monolithic air-core transformers, eliminating LED aging, current-drive resistors, and optical-degradation failure modes. What is a digital isolator? A digital isolator is a semiconductor device that transmits logic-level signals across a galvanically-isolated barrier (no conductive path between input and output) using either magnetic (transformer-based iCoupler), capacitive, or optical (LED + photodiode) coupling. Digital isolators occupy the 'isolation' tier within the power management / signal integrity hierarchy, sitting between general-purpose logic and the broader category of interface ICs. The principal figure-of-merit is working voltage (kVrms), supplemented by CMTI (kV/us) and data rate (Mbps). Key features of the ADUM3201ARZ include two independent isolation channels supporting unidirectional (default) or reverse channel configurations, 3.3V/5V level translation across the isolation barrier, low dynamic power consumption proportional to data rate, and -40C to +125C industrial operating temperature range. The 25kV/us CMTI rating exceeds typical optocoupler specifications (often 1-10 kV/us), making it well suited to high-noise motor-drive and power-converter environments where fast transients can corrupt logic. The ADuM3201 architecture uses wafer-level transformers with CMOS drivers and receivers, yielding deterministic propagation delay around 150ns and channel-to-channel matching typically within 5ns. Because no DC path crosses the isolation, the device exhibits superior long-term reliability versus optocouplers whose LED-output CTR degrades over thousands of hours. Typical applications include isolated SPI/UART interfaces in industrial PLCs, gate-drive signal isolation for IGBT/MOSFET half-bridges, isolated ADC front-ends in data-acquisition systems, isolated USB/RS-485 transceivers, and medical equipment requiring 2.5kV patient-isolation. The wide-body SOIC-8 footprint and pin-out matches standard 8-pin optocouplers, enabling retrofit upgrades with no PCB changes. When designing with the ADuM3201ARZ, decouple each VDD pin with a 0.1uF ceramic capacitor placed within 2mm of the supply pin; insufficient decoupling can degrade CMTI performance. The device requires no external driver components - unlike optocouplers which need LED current-limit resistors - simplifying BOM count. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone - giving engineers a single reference for the ADUM3201ARZ.
ADUM3201TRZ-EP - 2.5kVrms Dual Digital Isolator, 25Mbps | ADI
The Analog Devices ADUM3201TRZ-EP is a dual-channel digital isolator based on ADI's proprietary iCoupler technology, rated for 2500 Vrms isolation voltage and supporting data rates up to 25 Mbps in an 8-pin SOIC_N package. It provides two independent isolation channels with 25 kV/µs common-mode transient immunity (CMTI), combining high-speed CMOS and monolithic air-core transformer technology on a single silicon die. The EP suffix indicates the enhanced-product (military/aerospace) variant supporting -40°C to +125°C operating temperature. A digital isolator is a semiconductor device that transfers data across an isolation barrier (galvanic isolation) while blocking high-voltage transients, ground potential differences, and noise between two circuit domains. iCoupler technology uses chip-scale transformers instead of LEDs and photodiodes used in optocouplers, providing superior speed, lower power, higher reliability, and tighter channel-to-channel matching. Digital isolators belong to the broader hierarchy of interface ICs (Integrated Circuits > Interface ICs > Digital Isolators > Galvanic Isolation), and they are essential in systems where functional or safety isolation is mandated by IEC 60950, IEC 62368-1, or UL 1577. Key features include 25 Mbps guaranteed data rate, 2.5 ns typical rise/fall time, low dynamic power consumption that scales with data rate, and 3.3 V or 5 V operation on either side of the barrier providing bidirectional voltage translation. The device supports bidirectional channel configurations (one forward, one reverse) for serial peripheral interface (SPI) or RS-485 half-duplex applications. The 8-SOIC package is a wide-body (0.154 inch / 3.90 mm) outline with reinforced 8 mm creepage, ensuring compliance with 2500 Vrms reinforced isolation. The ADUM3201TRZ-EP integrates planar transformers and CMOS logic in a monolithic die, eliminating optocoupler LED aging and current-transfer-ratio (CTR) drift. With 25 kV/µs CMTI it can tolerate fast switching transients in motor drive, solar inverter, and industrial I/O applications without data corruption. The supply current scales linearly with channel throughput, enabling significantly lower power than optocouplers at high data rates. Typical applications include isolated SPI interfaces in motor drives and solar inverters, isolated RS-485/RS-232 transceivers, isolated gate-drive signal paths for IGBT/MOSFET half-bridges, industrial fieldbus isolation (Profibus, Modbus), and military/aerospace avionics requiring EP-grade temperature and reliability. The EP suffix enables use in defense and aerospace systems subject to MIL-STD-883 environmental stress. When designing with this isolator, ensure that the wide-body SOIC land pattern maintains the 8 mm minimum creepage required for 2500 Vrms reinforced isolation per IEC 62368-1. Decoupling capacitors of 0.1 µF should be located within 2 mm of each supply pin to handle high-frequency switching transients. Avoid routing signal traces directly beneath the device to preserve the isolation gap. This page synthesizes distributor pricing across 9+ sources, drop-in ADI and cross-brand alternative MPNs, and engineering design notes not found in the standalone manufacturer datasheet.
ADUM3400CRWZ-RL - Quad-Channel Digital Isolator, 2.5kV, 90Mbps | Analog Devices
The Analog Devices ADUM3400CRWZ-RL is a 4-channel digital isolator based on Analog Devices iCoupler technology, providing 2500Vrms isolation with up to 90 Mbps data rate in a 16-pin wide-body SOIC (RW-16) package supplied on a 13-inch tape-and-reel. A digital isolator is an integrated component that transmits binary data across an electrical isolation barrier using non-conducting coupling mechanisms, replacing legacy optocouplers in modern industrial and instrumentation designs. Digital isolators sit hierarchically between general-purpose isolators and the broader signal conditioning and interface IC family, and they are commonly deployed upstream of an MCU's GPIO, downstream of a sensor's logic output, or across the high-side/low-side boundary in motor-drive and power-converter systems. Where applicable, they replace optocouplers with the benefits of higher speed, tighter channel matching, and lower timing skew. Key features of the ADUM3400CRWZ-RL include a 90 Mbps guaranteed signaling rate per channel (5 V operation), a CMTI rating of 25 kV/us minimum, and enhanced system-level ESD reliability per IEC 61000-4-x. The device operates from 2.7 V to 5.5 V on either side of the barrier, supports 4/0 channel directionality (all four channels the same direction), and consumes a low 1.4 mA per channel at 0 Mbps to 2 Mbps. The package provides a withstand-to-works rating of 2500 Vrms for 1 minute per UL 1577 and is rated for 5 kV HBM ESD on the I/O pins. The iCoupler architecture combines high-speed CMOS with monolithic air-core transformers, achieving data rates roughly 5-10x faster than optocouplers at a fraction of the LED-degradation-related concerns. The 16-SOIC wide-body footprint gives 8 mm of minimum external clearance, and the device is qualified for industrial temperature ranges. Typical uses include isolated SPI/UART interfaces between microcontrollers and high-voltage drivers, gate-drive signal isolation in motor-control inverters, isolated data acquisition between ADCs and FPGAs, and industrial fieldbus (RS-485, CAN) interface isolation. The wide temperature range also supports harsh industrial environments. When designing with this part, observe the 8 mm minimum external clearance required by the wide-body SOIC footprint for 2500 Vrms reinforced isolation. The two supply pins (VDD1 and VDD2) must be bypassed with 0.1 uF capacitors placed as close as possible to the IC. Pin 4 (DISABLE input) and the four data channels follow a specific logic convention that must be respected during power-up sequencing. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing an information layer beyond raw spec extraction.
ADUM4151ARIZ-RL - 5kV 7-CH SPIsolator Digital Isolator | Analog Devices
The Analog Devices ADUM4151ARIZ-RL is a 5 kV rms, 7-channel SPIsolator digital isolator optimized for isolated serial peripheral interfaces (SPI), housed in a 20-pin wide-body SOIC (increased creepage) package. It carries the auxiliary-channel configuration of 2 forward / 1 reverse on top of the four dedicated SPI data lanes (CLK, MO/SI, MI/SO, SS), and supports data rates up to 2 Mbps with a common-mode transient immunity (CMTI) of 25 kV/µs. The -RL suffix denotes a 13-inch tape-and-reel packaging option. A SPIsolator is a specialized digital isolator designed to break ground loops across the SPI bus by combining reinforced galvanic isolation with very low propagation delay. Within the broader power-management and interface-IC taxonomy, a SPIsolator belongs to digital isolators -> interface isolators -> interface ICs -> integrated circuits. The ADUM4151 family is built on Analog Devices' proprietary iCoupler chip-scale transformer technology, replacing legacy optocouplers with a smaller, faster, and more reliable silicon-based transformer coupling. Key differentiating features include 5 kV rms reinforced isolation per UL 1577, 25 kV/µs minimum CMTI for robust operation in noisy motor-drive and power-converter environments, 2 Mbps signaling across all seven channels, and a maximum propagation delay of 25 ns that preserves SPI timing margins for high-speed master-slave links. The wide-body SOIC_W package provides >8 mm creepage, satisfying IEC 60747-17 / VDE 0884-11 reinforced-insulation requirements on standard 2-layer PCB layouts. On the architectural side, the device integrates an isolated DC-to-DC converter bias inside the same chip, removing the need for an external isolated supply on the secondary side - a major system BOM saving versus optocoupler-based isolation stacks. Each SPI lane is independently bidirectional-aware through the auxiliary channel mapping, and the device ships in industrial (-40°C to +125°C) operating grade. Typical applications include isolated SPI between microcontroller and gate-driver ASICs in 1.2 kV/3.3 kV solar inverters, isolated command/feedback links in industrial PLCs and servo drives, isolated sensor readouts for medical imaging systems, and reinforced isolation barriers in EV traction inverters and battery-management systems. It also fits functional-safety circuits where the auxiliary-channel mapping is required. When designing with the ADUM4151ARIZ-RL, place the device close to the SPI master to keep the un-isolated stub short, and observe the SOIC_W pad geometry (Gull-wing, 7.50 mm body width) for clean wave-solder profiles. Avoid routing the secondary-side traces near switching nodes; the 25 kV/µs CMTI rating still requires a 4 mm minimum keep-out from dV/dt edges for best margin. This page synthesizes verified distributor pricing, drop-in pin-compatible alternatives, and design notes that go beyond the manufacturer datasheet to accelerate BOM decisions.
ADUM4154ARIZ - 5kV SPI Digital Isolator | Analog Devices
The ADUM4154ARIZ is a 4-channel SPIsolator digital isolator from Analog Devices, optimized for serial peripheral interface (SPI) applications. It provides galvanic isolation up to 5000 Vrms and supports SPI clock rates up to 17 MHz. The device is based on Analog Devices' iCoupler chip-scale transformer technology, which offers low propagation delay and jitter in the CLK, MO/SI, MI/SO, and SS SPI bus signals. It comes in a 20-pin SOIC-W package (0.295" width, 7.50mm) and operates over a wide temperature range of -40°C to +125°C. A digital isolator is a device that transfers digital signals across an isolation barrier, providing galvanic isolation to protect sensitive circuitry from high voltages, ground loops, and noise. In the hierarchy of isolation components, a digital isolator falls under the category of isolation ICs, which are part of the broader power management and signal conditioning ICs. The ADUM4154ARIZ specifically targets SPI communication, a synchronous serial interface widely used in embedded systems to connect microcontrollers to sensors, ADCs, DACs, and other peripherals. Key features of the ADUM4154ARIZ include support for up to four slave devices via two address pins, a 2 Mbps data rate (as listed by DigiKey, though the datasheet indicates 17 MHz SPI clock), and a high common-mode transient immunity (CMTI) of 25 kV/µs. The device operates with a supply voltage range of 4.5V to 5.5V on VDD1 and 3.0V to 3.6V on VDD2, allowing level shifting between different logic domains. The propagation delay is low, ensuring minimal skew in SPI timing. Technically, the ADUM4154ARIZ 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 reliability. The device also includes an enable pin for power management and a thermal shutdown feature for protection. Typical applications include industrial automation, motor control, data acquisition systems, and any SPI-based system requiring isolation between a controller and peripheral devices. The high CMTI makes it suitable for noisy environments such as factory floors and power conversion systems. When designing with the ADUM4154ARIZ, ensure proper PCB layout with adequate creepage and clearance distances for the 5kV isolation rating. Also, decouple both supply rails with 0.1µF capacitors close to the pins to minimize noise.
ADUM4154ARIZ-RL - 5kV SPI Digital Isolator | Analog Devices
The ADUM4154ARIZ-RL is a 5 kV, 7-channel, SPIsolator digital isolator from Analog Devices, optimized for serial peripheral interface (SPI) applications. It supports up to four slave devices and is based on the iCoupler chip-scale transformer technology. The device provides 5000 Vrms isolation, a data rate of 2 Mbps, and a common-mode transient immunity (CMTI) of 25 kV/µs. It is available in a 20-SOIC (0.295", 7.50mm Width) package, suitable for surface-mount assembly. A digital isolator is a device 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 component in industrial automation, medical equipment, 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 ADUM4154ARIZ-RL include support for SPI clock rates up to 17 MHz, low propagation delay and jitter, and the ability to route the slave select signal to one of four destinations using two low-speed address pins. The device operates over a wide temperature range of -40°C to +125°C and supports supply voltages of 4.5V to 5.5V on VDD1 and 3.0V to 3.6V on VDD2. It is RoHS compliant and lead-free. The ADUM4154ARIZ-RL uses iCoupler technology, which employs chip-scale transformers to achieve isolation, offering advantages over optocouplers such as higher data rates, lower power consumption, and better reliability. The device is designed to meet stringent safety standards, making it suitable for applications requiring reinforced isolation. Typical applications include SPI isolation in industrial fieldbus systems, isolated sensor interfaces, motor control, and medical monitoring equipment. 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, ensure proper PCB layout to maintain isolation spacing and minimize parasitic capacitance. Also, consider the power supply decoupling to ensure stable operation across the isolation barrier.
ADUM4154BRIZ - 5kV SPI Digital Isolator | Analog Devices
The ADUM4154BRIZ is a 5 kV, 7-channel SPIsolator digital isolator from Analog Devices, optimized for serial peripheral interface (SPI) applications. It supports SPI clock rates up to 17 MHz and provides isolation for up to four peripheral devices. The device is based on Analog Devices' iCoupler chip-scale transformer technology, which offers low propagation delay and jitter in the CLK, MO/SI, MI/SO, and SS SPI bus signals. It comes in a 20-lead SOIC-W package (0.295" width, 7.50 mm) and is rated for 5000 Vrms isolation voltage with a common-mode transient immunity (CMTI) of 25 kV/µs. 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 used to protect sensitive electronics from high voltages, ground loops, and noise, and is essential in industrial, medical, and automotive applications where safety and signal integrity are critical. Digital isolators are part of the broader category of interface ICs, which also includes transceivers, level shifters, and optocouplers. Key features of the ADUM4154BRIZ include its 4-channel SPI isolation with support for multiple slaves, a data rate of 34 Mbps, and a wide supply voltage range of 3 V to 5.5 V. The device also features low propagation delay and jitter, ensuring reliable high-speed SPI communication. The iCoupler technology provides superior performance compared to optocouplers, including higher data rates, lower power consumption, and better reliability. The ADUM4154BRIZ is designed for use in industrial automation, motor control, and isolated SPI communication in data acquisition systems. Its high CMTI of 25 kV/µs makes it suitable for harsh environments with fast voltage transients. The device operates over a temperature range of -40°C to +125°C, making it suitable for industrial applications. When designing with the ADUM4154BRIZ, it is important to ensure proper PCB layout to maintain isolation performance. The device requires careful attention to creepage and clearance distances, as well as proper decoupling of the power supply pins. The datasheet provides detailed guidelines for layout and application circuits.
ADUM4160BRIZ - 5kV USB Digital Isolator, 12Mbps, 16-SOIC
The Analog Devices ADUM4160BRIZ is a USB port isolator based on Analog Devices iCoupler technology, providing 5 kV rms galvanic isolation while supporting low-speed (1.5 Mbps) and full-speed (12 Mbps) USB 2.0 data rates. Housed in a 16-pin SOIC-W (RW-16) wide-body package, the part combines high-speed CMOS with monolithic air-core transformer technology to deliver up to 25 kV/us common-mode transient immunity (CMTI) and 60 ns typical propagation delay. The bidirectional architecture isolates the D+ and D- data lines while passing through VBUS power on a separate isolated path. A USB digital isolator is a specialized interface IC that bridges a USB host or hub to a peripheral across an isolation barrier. It belongs to the broader family of digital isolators, which sit within the signal-isolation hierarchy of interface ICs and ultimately within the power-management and signal-conditioning semiconductor category. Unlike generic multi-channel digital isolators, the ADuM4160 transparently handles USB handshaking, suspend/resume, and chirp signaling so that microcontrollers can present only the D+/D- pins without software overhead. Key specifications include 5000 V rms isolation voltage (1 minute per UL 1577 / IEC 60747-17), 5.5 V maximum VBUS supply on the upstream side, 7 mA upstream supply current at 1.5 Mbps, 12 Mbps full-speed operation, 25 kV/us minimum CMTI, and 60 ns typical propagation delay. The ADUM4160BRIZ suffix denotes the wide-body 16-SOIC (0.295 in., 7.5 mm width) with 8 mm minimum creepage distance, suitable for reinforced isolation per IEC 60601-1 and IEC 60950-1. Architecturally the device integrates two iCoupler data channels plus a dedicated isolated DC-DC path, allowing single-package +5V VBUS-to-peripheral isolation. Internal edge-detect logic monitors the bus idle level required by USB 2.0 and automatically latches the correct state, eliminating the need for external buffering. The wide-body SOIC provides reinforced insulation and supports 250 V rms or 400 V rms working voltage per VDE 0884-11. Typical applications include isolated USB medical device interfaces, industrial PLC programming ports, USB-to-UART isolation bridges, isolated data acquisition front ends, and patient-monitoring equipment where reinforced isolation is mandatory. The wide-body SOIC footprint also supports high-density USB hub designs requiring 5 kV isolation per port. When designing with the ADuM4160BRIZ, observe the recommended PCB layout to maintain 8 mm creepage: route the upstream (host-side) and downstream (peripheral-side) copper pours on opposite PCB surfaces with no overlap beneath the package. Place VBUS bypass capacitors as close as possible to the VDD pins to meet USB inrush current requirements. Decoupling should use 0.1 uF ceramic capacitors in parallel with 10 uF bulk capacitors on both sides of the isolation barrier. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone - in particular a comparison table that highlights differences between ADI, Silicon Labs, TI, and 3PEAK pin-compatible USB isolator families, and selection tips for matching CMTI and data-rate requirements to your medical or industrial application.
ADUM4220ARWZ - 4A Isolated Half-Bridge Gate Driver | Analog Devices
The ADUM4220ARWZ is a 4 A isolated, half-bridge gate driver from Analog Devices that employs iCoupler technology to provide independent and isolated high-side and low-side outputs. It is designed to drive power MOSFETs and IGBTs in a wide range of power conversion applications, offering 5000 Vrms isolation and a propagation delay of 38 ns. The device operates from a supply voltage range of 3.0 V to 5.5 V on the input side and 4.5 V to 18 V on the output side, making it versatile for various gate drive requirements. Isolated gate drivers are essential components in power electronics that provide galvanic isolation between the low-voltage control circuitry and the high-voltage power stage. They ensure safe and reliable switching of power transistors by transmitting gate drive signals across an isolation barrier, preventing ground loops and protecting sensitive control electronics from high-voltage transients. The ADUM4220ARWZ is part of the ADuM4220 family, which includes variants with different isolation ratings and output configurations. Key features of the ADUM4220ARWZ include a peak output current of 4 A, which enables fast switching of large gate capacitances, and a high common-mode transient immunity (CMTI) of 100 kV/µs, ensuring reliable operation in noisy environments. The device also features independent high-side and low-side outputs with a dead-time control input, allowing precise timing of complementary switching signals. The 16-lead SOIC package (SOIC-16) is compact and suitable for space-constrained designs. Technically, the ADUM4220ARWZ uses Analog Devices' proprietary iCoupler technology, which integrates micro-transformers and high-speed CMOS to achieve isolation without the need for external components. This results in lower power consumption and higher reliability compared to traditional optocoupler-based solutions. The device also includes undervoltage lockout (UVLO) on both the input and output supplies, ensuring proper operation during power-up and brownout conditions. Typical applications include isolated switch-mode power supplies, motor drives, solar inverters, and industrial automation systems. The high isolation voltage and fast switching make it ideal for applications requiring robust galvanic isolation and high-frequency operation. The ADUM4220ARWZ is also suitable for automotive and industrial environments where reliability and safety are paramount. When designing with the ADUM4220ARWZ, it is important to ensure proper PCB layout to minimize parasitic inductance and maintain signal integrity. The input and output supplies should be adequately decoupled with ceramic capacitors placed close to the device pins. Additionally, the dead-time control input should be configured to prevent shoot-through in half-bridge topologies.