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ADP5589ACBZ-02-R7 - 19-Channel GPIO/Keypad Expander | Analog Devices
The Analog Devices ADP5589ACBZ-02-R7 is a 19-channel GPIO (General Purpose Input/Output) port expander with an integrated keypad matrix decoder, dual programmable logic blocks, reset logic and a PWM generator, housed in a 25-ball WLCSP (1.99 mm x 1.99 mm) package and operated from a 1.65 V to 3.6 V supply. An I/O expander is a type of interface IC that extends the number of general-purpose pins a host microcontroller can drive or read. It sits between the host and the outside world on a two-wire I2C bus, translating a small serial command set into parallel digital control of keys, LEDs, relays, and discrete logic. In the ADP5589 this generic function is fused with a dedicated hardware keypad decoder, so a single serial bus line replaces an entire scanned key matrix and its driver firmware. Key features include 19 configurable I/Os usable as keypad decoding lines for a matrix up to 11 x 8, key press and key release interrupts, key pad lock/unlock, a 16-element FIFO for event recording, GPI with selectable interrupt level, selectable 100 kOhm or 300 kOhm pull-up resistors, 300 kOhm pull-down resistors, and GPO outputs configurable as push-pull or open drain. Two independent programmable logic blocks allow simple hardware-level conditional functions without firmware polling, and the PWM generator supports both internal PWM generation and external PWM triggering through an internal PWM AND function. Technically the device offloads repetitive, latency-sensitive work from the host MCU. Because the keypad scan and debounce logic runs in hardware, the host receives event interrupts through the 16-deep FIFO rather than continuously polling a matrix, which reduces code size, CPU wake-ups and battery drain in portable designs. The 1.65 V to 3.6 V supply range spans mobile and battery-powered rails as well as standard 3.3 V industrial and instrumentation nodes. Typical applications include QWERTY-size keypad decoding in remote controls and handsets, GPIO expansion in portable consumer electronics, keypad plus LED feedback panels in healthcare devices, and programmable logic or PWM-driven indicator control in compact industrial instrumentation. A key design consideration is that the ADP5589 is a fixed-function device with configuration registers set over I2C, so it complements rather than replaces a fully programmable MCU. Layout should keep the 25-ball WLCSP on a clean ground plane with short I2C traces and adequate ball-to-ball decoupling. This page synthesizes distributor pricing and availability, package-level drop-in alternatives, and practical layout and design notes that are not consolidated in the manufacturer datasheet.
ADP5589ACPZ-01-R7 - 19-Channel GPIO Key Controller | Analog Devices
The Analog Devices ADP5589ACPZ-01-R7 is a 19-channel GPIO port expander with an integrated keypad matrix decoder, programmable logic, reset logic, and PWM generator, packaged in a 24-pin LFCSP-WQ (3.5 mm × 3.5 mm) surface-mount package. The device supports I2C-connected keypad and general-purpose I/O expansion, provides a 16-element FIFO for event recording, and is specified for operation up to 3.6 V according to distributor product data. An I/O expander is an interface IC that increases the number of general-purpose input/output pins available to a host processor. The ADP5589 belongs to the broader GPIO expander hierarchy and combines conventional port expansion with dedicated keypad-scanning functions. Its integrated keypad matrix decoder can handle QWERTY-size keyboards, while its programmable I/O channels can operate as inputs or outputs for control, status, and discrete interface signals. Key features include 19 configurable I/O channels, integrated keypad decoding, press and release interrupts, keypad lock and unlock functions, programmable logic, reset generation, and a PWM generator. The 16-element FIFO records GPIO or keypad events so the host processor can retrieve them through the serial interface. The -01 ordering code identifies a specific configuration within the ADP5589 family, while the -00 and -02 ordering codes represent other family variants whose detailed configuration differences require datasheet-level verification. The ADP5589 uses an I2C interface to connect a relatively low-pin-count microcontroller or application processor to additional keypad rows, columns, LEDs, control signals, or status inputs. Programmable logic can offload simple decision functions from the host processor, while the FIFO helps separate event production from event processing. This combination is especially useful when the host lacks sufficient direct GPIO pins or when a matrix keypad must share the same bus with other low-speed peripherals. Typical uses include QWERTY-size keypad interfaces in portable and medical equipment, camera and remote-control panels, industrial instrumentation, and compact human-machine interfaces. It is also applicable to GPIO-heavy control panels where key events, indicator outputs, and switch inputs must be managed over I2C. The small 3.5 mm × 3.5 mm package supports compact PCB layouts, although exposed-pad thermal management and careful high-speed trace routing remain important. Designers should verify the -01 variant’s register map and configuration limits against the current Analog Devices datasheet before treating another ordering code as a drop-in replacement. I2C pull-up placement, exposed-pad soldering, bus capacitance, and FIFO interrupt handling are the primary implementation considerations. The verified source data does not provide a complete pin list, operating-temperature range, current consumption, or exact logic thresholds.
ADP5589ACPZ-02-R7 - 19-Channel GPIO and Keypad Controller | Analog Devices
Analog Devices ADP5589ACPZ-02-R7 is a 19-channel GPIO port expander with a built-in keypad matrix decoder, programmable logic, reset logic, and PWM generator, supplied in a 24-LFCSP-WQ surface-mount package measuring 3.5 mm by 3.5 mm. It operates from a 1.65 V to 3.6 V supply and supports key matrices up to 11 × 8, while providing a 16-element FIFO for recording key events. A GPIO port expander is an interface IC that increases the number of general-purpose inputs and outputs available to a host processor. The ADP5589 combines that conventional expansion function with dedicated keypad decoding, programmable logic blocks, interrupt generation, and PWM generation. This integration reduces the need for separate matrix-scanning controllers and allows a host to monitor buttons, read switch states, drive LEDs, and generate pulse-width-modulated outputs through one device. The 19 configurable I/O channels support GPIO functions including key press and release interrupts, key lock and unlock functions, selectable interrupt levels, 100 kΩ or 300 kΩ pull-up options, and 300 kΩ pull-down resistors. General-purpose outputs can operate as push-pull or open-drain stages. Two programmable logic blocks add decision-making capability, and the integrated PWM generator supports internal PWM generation as well as external PWM configurations using internal logic signals. The ADP5589 is designed for systems where a primary microcontroller has too few pins for a keypad, indicator, or auxiliary control interface. Its FIFO can retain a sequence of key events for later processing, while interrupt signaling allows the host to react without continuously polling every input. The 24-LFCSP-WQ package supports compact portable equipment, instrumentation, healthcare, industrial, and remote-control designs. Typical uses include QWERTY and numeric keypads, portable medical controls, camera and remote-control interfaces, programmable industrial panels, and small embedded systems that need additional LEDs, switches, or logic-driven outputs. The device can reduce connector and host-pin requirements while centralizing scanning and event capture. Designers should confirm the exact -02 ordering option, pin mapping, exposed-pad connection, and electrical limits in the Analog Devices manufacturer datasheet before layout. Input levels, pull-up configurations, interrupt polarity, and keypad matrix dimensions must be checked against the host voltage and mechanical switch arrangement to avoid contention or unintended current draw. This product page consolidates manufacturer and distributor information, distinguishes documented ADP5589 order variants, and provides application guidance, comparison criteria, and sourcing context that are not presented as a single unified engineering summary in the underlying datasheet and distributor listings.
ADUM1201ARZ - Dual 2500Vrms 1Mbps Isolator | Analog Devices
The ADUM1201ARZ is a dual-channel digital isolator from Analog Devices, Inc., based on the proprietary iCoupler technology. It provides 2500Vrms isolation with a data rate of 1Mbps and a common-mode transient immunity (CMTI) of 25kV/µs. The device is housed in an 8-pin SOIC (0.154", 3.90mm width) package, making it suitable for space-constrained applications. It operates with a supply voltage range of 3.0V to 5.5V on both sides, allowing flexible interfacing with different logic levels. A digital isolator is a component that provides electrical isolation between two circuits while allowing digital signals to pass across the isolation barrier. Unlike optocouplers, which use LEDs and photodiodes, iCoupler devices use monolithic transformers and high-speed CMOS to achieve isolation. This approach eliminates the uncertain current transfer ratios, nonlinear transfer functions, and temperature and lifetime effects associated with optocouplers. Digital isolators are essential in applications where ground potential differences, noise, or safety requirements demand galvanic isolation, such as in industrial automation, medical equipment, and communication systems. Key features of the ADUM1201ARZ include its dual-channel configuration with 1/1 channel directionality, meaning one channel transmits data in each direction. The device supports data rates up to 1Mbps, making it suitable for low-to-moderate speed communication interfaces like SPI, UART, and GPIO isolation. The 25kV/µs CMTI ensures reliable operation in noisy environments, preventing false triggering due to fast transients. The iCoupler technology also consumes significantly less power than optocouplers, with typical quiescent current in the microampere range. The ADUM1201ARZ features a patented refresh mechanism that ensures DC correctness in the absence of input logic transitions and during power-up/power-down conditions. This is critical for maintaining the integrity of static signals across the isolation barrier. The device is available in both standard and automotive-grade versions, with the ADUM1201W variants qualified for 125°C operation. The 8-pin SOIC package is widely used and easy to integrate into existing PCB designs. Typical applications include isolating SPI and UART interfaces in industrial control systems, providing isolation in medical monitoring equipment, and protecting sensitive electronics in communication infrastructure. The device is also used in power supply control and motor drive circuits where high-voltage transients are present. Its small footprint and low power consumption make it ideal for portable and battery-powered devices. When designing with the ADUM1201ARZ, it is important to ensure proper power supply decoupling on both sides of the isolation barrier. Place 0.1µF capacitors close to the VDD1 and VDD2 pins to minimize noise. Additionally, consider the maximum data rate and CMTI requirements of your application to ensure the device meets your performance needs.
ADUM1201ARZ-RL7 - Dual-Channel Digital Isolator 2500Vrms | Analog Devices
The Analog Devices ADUM1201ARZ-RL7 is a dual-channel digital isolator based on the proprietary iCoupler technology, providing 2500Vrms galvanic isolation with a 1Mbps data rate and 25kV/µs common-mode transient immunity (CMTI). It is housed in an 8-SOIC (0.154", 3.90mm width) package, operates over a 3.0V to 5.5V supply range on both sides, and is rated for -40°C to +125°C operation. A digital isolator is a component that transfers digital signals across a galvanic isolation barrier without allowing direct current flow. Unlike optocouplers, which use LEDs and photodiodes, iCoupler devices use monolithic transformers and high-speed CMOS to achieve higher data rates, lower power consumption, and more stable performance over temperature and lifetime. Digital isolators are essential in systems where ground potential differences, noise, or safety requirements demand isolation, such as in industrial automation, medical equipment, and data acquisition. Key features of the ADUM1201ARZ-RL7 include 1/1 channel directionality (one forward channel and one reverse channel), which is ideal for bidirectional communication. The device delivers 2500Vrms isolation voltage, 1Mbps data rate, and 25kV/µs CMTI, ensuring reliable operation in noisy environments. The wide supply range supports both 3.3V and 5V logic levels, and the typical quiescent current is only 1.3mA per channel, making it suitable for power-sensitive applications. Technically, the ADuM1201 combines high-speed CMOS and monolithic transformer isolation in an 8-lead SOIC package. This architecture eliminates the need for external drivers and discrete components, reducing board space and improving reliability. Unlike optocouplers, iCoupler technology does not suffer from current transfer ratio degradation, providing stable isolation performance throughout the product lifetime. Typical applications include industrial automation for isolating field buses and sensor interfaces, medical devices where patient safety requires galvanic isolation, and data acquisition systems to prevent ground loops and noise. It is also used in power supply control, motor drives, and communication interfaces. When designing with this device, place bypass capacitors close to the VDD1 and VDD2 pins and maintain proper PCB spacing across the isolation barrier to preserve creepage and clearance requirements. The high CMTI rating makes the part robust in fast-switching environments, but careful layout is still required to maximize isolation performance.
ADUM1201BRZ - 2-Ch Digital Isolator 10Mbps | Analog Devices
The ADUM1201BRZ is a dual-channel digital isolator from Analog Devices, based on the proprietary iCoupler technology. It provides 2500Vrms isolation with a data rate of 10Mbps and a common-mode transient immunity (CMTI) of 25kV/µs. The device is housed in an 8-pin SOIC (0.154", 3.90mm width) package, making it suitable for space-constrained applications. It operates over a supply voltage range of 2.7V to 5.5V on both sides, allowing flexible interfacing with different logic levels. A digital isolator is a component that provides electrical isolation between two circuits while allowing digital signals to pass across the isolation barrier. Unlike optocouplers, which use LEDs and photodiodes, iCoupler devices use monolithic transformers and high-speed CMOS, eliminating concerns about current transfer ratio (CTR) degradation, nonlinear transfer functions, and temperature/lifetime effects. This results in more stable performance and lower power consumption—iCoupler devices consume about one-tenth the power of comparable optocouplers. Key features of the ADUM1201BRZ include a bidirectional channel configuration (1/1 directionality), a maximum data rate of 10Mbps, and a CMTI of 25kV/µs, which ensures reliable operation in noisy industrial environments. The device also offers a wide operating temperature range of -40°C to +105°C, making it suitable for harsh applications. The SOIC-8 package is industry-standard, enabling easy PCB layout and drop-in replacement in many designs. Technically, the ADUM1201BRZ uses a 2.7V to 5.5V supply range on both VDD1 and VDD2, with a maximum quiescent current of 2.6mA per channel. The propagation delay is typically 50ns, and the pulse width distortion is 3ns, ensuring accurate signal transmission. The device is certified to UL1577, IEC 60747-5-5, and CSA standards, providing robust isolation ratings. Typical applications include industrial fieldbus isolation, motor drives, battery monitoring, hybrid electric vehicles, and digital isolation in power supplies. The ADUM1201BRZ is particularly well-suited for isolating SPI, UART, and other serial interfaces where high-speed data transfer and reliable isolation are required. When designing with this device, ensure that the bypass capacitors (0.1µF) are placed close to the VDD pins to minimize noise. Also, consider the maximum data rate and CMTI requirements of your application to ensure the device meets your performance needs.
ADUM1201BRZ-RL7 - Dual-Channel Digital Isolator | Analog Devices
The ADUM1201BRZ-RL7 is a dual-channel digital isolator from Analog Devices, based on the proprietary iCoupler technology. It provides galvanic isolation up to 2500Vrms, with a data rate of 10Mbps and a common-mode transient immunity (CMTI) of 25kV/µs. The device is housed in an 8-pin SOIC (0.154", 3.90mm width) package, making it suitable for space-constrained applications. 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 systems where safety, noise immunity, or ground potential differences are concerns. The ADUM1201BRZ-RL7 uses monolithic transformer technology, which offers superior performance compared to traditional optocouplers, including higher data rates, lower power consumption, and better reliability. Key features of the ADUM1201BRZ-RL7 include its 1/1 channel directionality (one forward, one reverse), a wide supply voltage range of 3.0V to 5.5V, and a propagation delay of typically 50ns. The device also features a high CMTI of 25kV/µs, ensuring reliable operation in noisy industrial environments. Its low power consumption and small package make it ideal for battery-powered and portable applications. The ADUM1201BRZ-RL7 is designed using Analog Devices' iCoupler technology, which integrates micro-transformers and high-speed CMOS circuits on a single chip. This architecture eliminates the need for external components and provides a robust isolation solution. The device meets various safety standards, including DIN EN 60950, and is RoHS compliant. Typical applications include motor drives, battery monitors, hybrid electric vehicles, and digital fieldbus isolation. In motor drives, the isolator protects control circuits from high-voltage transients. In battery monitoring, it ensures safe communication between cells and the controller. The device's high CMTI and data rate make it suitable for industrial automation and communication interfaces. When designing with the ADUM1201BRZ-RL7, it is important to ensure proper PCB layout to maintain isolation performance. Keep the isolation barrier clear of copper traces and place decoupling capacitors close to the supply pins. Also, consider the propagation delay and timing requirements of your system to avoid data corruption.
ADUM121N0WBRZ-RL7 - 150Mbps Dual Digital Isolator, 3kV | Analog Devices
The Analog Devices ADUM121N0WBRZ-RL7 is a dual-channel digital isolator based on Analog Devices' iCoupler technology, providing 3000 Vrms isolation and 150 Mbps data rate in an 8-pin SOIC-N (NSOIC) wide-body package. It uses a 1/1 channel configuration (one forward, one reverse) and combines CMOS with monolithic air-core transformer technology to deliver superior performance versus optocouplers. The device operates from 1.7 V to 5.5 V on both sides and supports 100 kV/us common-mode transient immunity (CMTI). A digital isolator is a semiconductor device that transfers digital signals between two circuit domains while providing galvanic isolation - a safety barrier that blocks DC and low-frequency fault currents while allowing high-speed data to pass through transformer, capacitive, or optical coupling. iCoupler technology integrates a chip-scale air-core transformer on a CMOS die, replacing the LED/photodiode stack used in optocouplers. Compared with optocouplers, iCoupler parts like the ADuM121N offer 10x to 100x faster data rates, tighter pulse-width distortion, lower power, and no LED-degradation aging effects. Digital isolators sit in the signal-conditioning block between sensors/MCUs and the rest of the system. Key features of the ADuM121N0WBRZ-RL7 include 25 ns typical propagation delay, 2 ns typical pulse-width distortion, 4 mA per-channel supply current at 3.3 V, and 100 kV/us minimum CMTI. The wide-body SOIC package provides the 3 kVrms reinforced isolation needed for industrial and renewable-energy applications while exposing the part to standard 8-pin SMD assembly. The -RL7 suffix denotes a 7-inch tape-and-reel packaging for high-volume production. From an architectural standpoint, the ADuM121N uses a differential transformer coupling path with on-chip encoding that refreshes the input state on every clock cycle, eliminating the run-length limitations of competing edge-based architectures. The wide supply range (1.7 V to 5.5 V) allows direct connection to 1.8 V, 2.5 V, 3.3 V, or 5 V logic without level shifters, simplifying mixed-voltage isolation. The 150 Mbps data rate supports SPI, I2C (via bit-banging), RS-485, and high-speed GPIO up to about 10 MHz NRZ. Typical applications include isolated SPI interfaces for motor drives, isolated gate-drive signal paths in solar inverters, RS-485/RS-232 isolation in industrial PLCs, isolated ADC front-ends for medical and test equipment, and digital control links in EV battery management systems. Designers favor this part when 3 kVrms isolation, high CMTI, and 150 Mbps throughput must coexist in a wide-body SOIC footprint. When designing with the ADuM121N0WBRZ-RL7, place decoupling capacitors (typically 0.1 uF) on both VDD1 and VDD2 within 2 mm of the supply pins, and route the input/output traces on opposite sides of the isolation barrier to maintain creepage. Confirm that PCB layout preserves the 4 mm minimum clearance required by the 8-SOIC wide-body package for 3 kVrms reinforced isolation.
ADUM1250ARZ - Hot Swappable Dual I2C Isolator | Analog Devices
The ADUM1250ARZ is a hot-swappable, dual-channel digital isolator from Analog Devices, specifically designed for bidirectional I2C communication. It provides 2500Vrms isolation with a data rate of 1Mbps and a common-mode transient immunity (CMTI) of 25kV/µs. The device is housed in an 8-lead SOIC package (0.154", 3.90mm width) and operates from a 3.0V to 5.5V supply, making it suitable for a wide range of isolated I2C applications. Digital isolators are components that transfer digital signals across an isolation barrier without a direct electrical connection, using capacitive, inductive, or optical coupling. They are essential in systems where safety, noise immunity, or ground potential differences require galvanic isolation. The ADUM1250ARZ uses Analog Devices' proprietary iCoupler chip-scale transformer technology, which offers advantages over traditional optocouplers, including higher data rates, lower power consumption, and better reliability. Key features of the ADUM1250ARZ include nonlatching, bidirectional communication channels that are compatible with I2C interfaces, eliminating the need to split I2C signals into separate transmit and receive lines. It supports hot-swap capability, allowing insertion or removal of boards without powering down the system. The device also features open-drain outputs with 30mA current sink capability, ensuring compatibility with standard I2C bus specifications. Technically, the ADUM1250ARZ provides two bidirectional channels, supporting a complete isolated I2C interface. It has a maximum data rate of 1Mbps, which is sufficient for standard and fast-mode I2C. The isolation barrier is rated at 2500Vrms, providing robust protection against voltage transients. The device operates over a temperature range of -40°C to +125°C, making it suitable for industrial environments. Typical applications include isolated I2C buses in industrial automation, medical equipment, power management systems, and communication interfaces. The ADUM1250ARZ is also used in hot-swap applications where boards need to be replaced without interrupting system operation. When designing with the ADUM1250ARZ, it is important to ensure proper decoupling of the power supply pins and to follow the recommended layout guidelines to maintain isolation performance. The device is RoHS compliant and available in tape and reel packaging.
ADUM1250ARZ-RL7 - I2C Digital Isolator 2500Vrms | Analog Devices
The ADUM1250ARZ-RL7 is a hot-swappable, dual-channel digital isolator from Analog Devices, specifically designed for I2C interfaces. It provides two bidirectional channels, enabling a complete isolated I2C interface without the need to split signals into separate transmit and receive paths. The device is housed in an 8-pin SOIC package (0.154", 3.90mm width) and offers 2500Vrms isolation, a data rate of 1Mbps, and a common-mode transient immunity (CMTI) of 25kV/µs. Digital isolators are components that transfer 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 paramount. The ADUM1250ARZ-RL7 belongs to the family of I2C isolators, which are specialized for bidirectional communication protocols like I2C. Key features include non-latching, bidirectional communication channels compatible with I2C interfaces, hot-swap capability, and a wide operating temperature range. The device supports data rates up to 1Mbps, making it suitable for standard and fast-mode I2C. Its high CMTI of 25kV/µs ensures reliable operation in noisy environments, and the 2500Vrms isolation rating provides robust protection. Technically, the ADUM1250ARZ-RL7 uses Analog Devices' iCoupler technology, which employs chip-scale transformers instead of optocouplers, offering higher reliability, lower power consumption, and better performance. The device operates from a 3.0V to 5.5V supply on both sides, and its hot-swap feature allows insertion or removal without disrupting the bus. Typical applications include isolated I2C buses in industrial automation, medical equipment, and power management systems. It is also used in battery management, motor control, and any system requiring galvanic isolation for I2C communication. When designing with this device, ensure proper decoupling on both supply pins and maintain adequate creepage distances on the PCB to meet isolation requirements. The hot-swap feature should be considered in system design to avoid bus contention during power-up.
ADUM1251ARZ - I2C Digital Isolator 2500Vrms | Analog Devices
The ADUM1251ARZ is a hot-swappable, bidirectional I2C digital isolator from Analog Devices, offering 2500Vrms isolation and a data rate of 1Mbps. It comes in an 8-pin SOIC package and operates over a supply range of 3V to 5.5V. This device integrates two channels with non-latching communication, simplifying I2C isolation without splitting signals into separate transmit and receive paths. Digital isolators are components that provide galvanic isolation between two circuits while allowing digital signals to pass. They are essential in systems where ground potential differences or noise could disrupt communication, such as in industrial automation, medical equipment, and power management. The ADUM1251ARZ specifically supports I2C, a widely used two-wire bus, making it a key building block in mixed-voltage and isolated systems. Key features include a common-mode transient immunity (CMTI) of 25kV/µs, ensuring reliable operation in noisy environments. The device supports hot-swap capability, allowing insertion or removal without powering down the bus. Its bidirectional channels are I2C-compatible on Side 2 and I2C-compatible on Side 1, with modified thresholds for compatibility. The propagation delay is 162ns, and the device is available in both tube and tape-and-reel packaging. Technically, the ADUM1251ARZ uses Analog Devices' iCoupler technology, which employs chip-scale transformers instead of optocouplers, offering higher reliability and lower power consumption. The device is specified over the industrial temperature range of -40°C to +125°C, making it suitable for harsh environments. It is RoHS compliant and lead-free. Typical applications include isolating I2C buses in industrial control systems, medical monitoring equipment, and power supply management. The device is also used in battery management systems and automotive electronics where isolation is required for safety and noise immunity. When designing with the ADUM1251ARZ, ensure proper decoupling with 0.1µF capacitors on both supply pins and maintain adequate PCB layout to minimize parasitic capacitance. The hot-swap feature requires careful consideration of bus capacitance and pull-up resistor values to avoid glitches during insertion.
ADUM1251ARZ-RL7 - Hot-Swappable Dual I2C Isolator | Analog Devices
The ADUM1251ARZ-RL7 is a hot-swappable, dual-channel digital isolator from Analog Devices, specifically designed for bidirectional I2C communication. It provides 2500Vrms isolation with a data rate of 1Mbps and a common-mode transient immunity (CMTI) of 25kV/µs. The device operates from a 3.0V to 5.5V supply and is available in an 8-lead SOIC package, making it suitable for space-constrained designs. Digital isolators are components that transfer digital signals across an isolation barrier, typically using capacitive or magnetic coupling, to protect sensitive circuitry from high voltages, noise, and ground potential differences. They replace optocouplers in many applications due to their superior speed, reliability, and integration. The ADUM1251ARZ-RL7 belongs to the iCoupler family, which uses chip-scale transformer technology for isolation. Key features include bidirectional I2C communication without the need for direction control, open-drain interfaces, 30mA current sink capability, and support for hot-swap applications. The device is qualified for automotive applications and operates over a temperature range of -40°C to +125°C. It is RoHS compliant and available in tape and reel packaging. The ADUM1251ARZ-RL7 uses Analog Devices' iCoupler technology, which integrates micro-transformers and high-speed CMOS circuits to achieve reliable isolation. This architecture provides low propagation delay and high CMTI, ensuring robust performance in noisy industrial environments. The device also features non-latching, bidirectional channels, simplifying I2C bus isolation. Typical applications include I2C bus isolation in industrial automation, power management systems, and automotive electronics. It is also used in medical devices and instrumentation where galvanic isolation is required for safety. The device's hot-swap capability allows insertion and removal of boards without disrupting the bus. When designing with the ADUM1251ARZ-RL7, ensure proper decoupling with 0.1µF capacitors on both supply pins. The Side 1 interface is I2C compatible, while Side 2 is fully I2C compliant, so verify the logic levels of connected devices. For high-speed operation, follow the layout guidelines in AN-1109 to minimize emissions.
ADUM1300ARWZ - 3-Ch Digital Isolator 2500Vrms | Analog Devices
The ADUM1300ARWZ is a triple-channel digital isolator from Analog Devices, based on the proprietary iCoupler® technology. It provides 2500Vrms isolation with three unidirectional channels, supporting data rates up to 1Mbps and a common-mode transient immunity (CMTI) of 25kV/µs. The device is housed in a 16-lead SOIC-W (0.295" width) package, suitable for surface-mount assembly. Digital isolators are components that transmit digital signals across an isolation barrier, providing galvanic isolation to protect circuits and users from high voltages, ground loops, and noise. They replace optocouplers in many applications, offering higher speed, better reliability, and lower power consumption. The ADUM1300ARWZ is part of the iCoupler family, which uses monolithic transformer technology to achieve superior performance compared to traditional optocouplers. Key features include three independent isolation channels, a wide supply voltage range of 3.0V to 5.5V, and a maximum data rate of 1Mbps. The device offers 25kV/µs CMTI, ensuring reliable operation in noisy industrial environments. It also features low power consumption, with typical quiescent current of 1.3mA per channel, and operates over a temperature range of -40°C to +105°C. The ADUM1300ARWZ uses a magnetic coupling architecture, where data is transmitted across a thin isolation barrier using integrated transformers. This approach eliminates the need for LEDs and photodiodes, improving performance and reliability. The device includes a refresh mechanism to maintain output states even when the input is static, ensuring correct operation in all conditions. Typical applications include industrial fieldbus communication, motor control, power inverters, and isolated SPI/UART interfaces. The high CMTI and 2500Vrms isolation make it suitable for harsh environments where noise and voltage transients are common. When designing with this device, ensure proper PCB layout with adequate creepage and clearance distances for the isolation rating. Place decoupling capacitors close to the VDD pins and follow the recommended layout guidelines in the datasheet to achieve optimal performance.
ADUM1300ARWZ-RL7 - 3-Ch 2500Vrms Digital Isolator | Analog Devices
The ADUM1300ARWZ-RL7 is a triple-channel digital isolator from Analog Devices, based on the proprietary iCoupler technology. It provides three independent isolation channels with a data rate of 1 Mbps and a withstand voltage of 2500 Vrms. The device operates with supply voltages from 2.7 V to 5.5 V on both sides, enabling voltage translation across the isolation barrier. It is housed in a 16-lead SOIC-W (wide body) package, suitable for surface-mount assembly. Digital isolators are components that transmit digital signals across an isolation barrier, providing galvanic isolation to protect sensitive circuitry from high voltages, ground loops, and noise. They are essential in industrial, medical, and communication systems where safety and signal integrity are critical. The ADUM1300 uses monolithic transformers and high-speed CMOS, offering superior performance compared to traditional optocouplers, such as higher data rates, lower power consumption, and better reliability. Key features include a common-mode transient immunity (CMTI) of 25 kV/µs, ensuring reliable operation in noisy environments. The device supports a wide operating temperature range of -40°C to +105°C, making it suitable for industrial applications. The iCoupler technology eliminates the need for LEDs and photodiodes, simplifying design and improving long-term stability. The ADUM1300ARWZ-RL7 is designed for general-purpose isolation in applications such as industrial fieldbus communication, isolated SPI/UART interfaces, and motor control. Its 1 Mbps data rate is adequate for many control and monitoring signals, while the 2500 Vrms isolation rating provides robust protection. The wide supply range allows interfacing between different voltage domains, such as 3.3 V and 5 V systems. When designing with this isolator, ensure proper PCB layout with adequate creepage and clearance distances to maintain the isolation rating. Bypass capacitors should be placed close to the VDD pins on both sides. The device is RoHS compliant and lead-free, meeting environmental standards. Typical applications include isolated data acquisition, power inverter gate drive isolation, and medical equipment where patient safety requires galvanic isolation. The ADUM1300ARWZ-RL7 is a reliable choice for engineers seeking a compact, high-performance digital isolator.
ADUM1301ARW-RL - Triple-Channel Digital Isolator, 1Mbps, 16-SOIC | Analog Devices
The Analog Devices ADUM1301ARW-RL is a triple-channel digital isolator based on the proprietary iCoupler architecture, providing 2500 Vrms isolation across three independent data channels in a 16-pin SOIC wide-body (RW) package. The grade A speed grade supports data rates up to 1 Mbps with a typical propagation delay of 100 ns and operates from a 2.7 V to 5.5 V supply on either side of the isolation barrier, enabling voltage translation functionality across the barrier. A digital isolator is a semiconductor device that transfers logic-level signals between two electrically separated circuits, replacing legacy optocouplers. Isolator functions are essential isolation domains in any system that requires safety isolation between low-voltage control logic and hazardous high-voltage domains, while still allowing high-speed data exchange. The isolator category belongs to the broader signal-conditioning and isolation IC family, sitting within the interface IC hierarchy. Key features include 25 kV/µs common-mode transient immunity (CMTI), low power operation (1.2 mA per channel at 0-2 Mbps, 5 V supply), 32 mA per channel maximum at 90 Mbps operation, automotive qualification per the datasheet, and a wide-body 16-SOIC package with 7.5 mm body width to support reinforced insulation creepage. The device is qualified for automotive applications and offers default low outputs. The ADUM1301ARW-RL uses monolithic air-core transformer technology combined with high-speed CMOS, avoiding the LEDs and photodiodes used in optocouplers. This eliminates the design difficulties associated with optocouplers (current-transfer-ratio degradation, slow switching, and LED aging) while providing superior common-mode transient immunity and stable timing across temperature. Typical applications include isolated gate logic in motor drives and industrial inverters, isolated data acquisition in PLC systems and process control, isolated SPI / RS-232 / RS-485 interfaces, isolated logic level translation between microcontrollers and power stages, and isolated control signals in medical and energy systems that require reinforced insulation per IEC 60747-17. Design consideration: the wide-body SOIC-16 (0.295" body width) provides the required creepage distance for reinforced insulation at 2500 Vrms. Ensure that no copper traces or vias run beneath the package body between the two isolation domains, and place decoupling capacitors (0.1 µF ceramic) as close as possible to each VDD pin. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone ADuM1300/ADuM1301 datasheet.
ADUM1301ARWZ - 3-Ch Digital Isolator 2500Vrms | Analog Devices
The Analog Devices ADUM1301ARWZ is a triple-channel digital isolator rated at 2500Vrms with a 1 Mbps data rate and 25 kV/µs common-mode transient immunity (CMTI), housed in a 16-pin SOIC-W (0.295 inch / 7.50 mm width) wide-body package. Built on Analog Devices' proprietary iCoupler technology, the device integrates high-speed CMOS with monolithic air-core transformers to transmit digital signals across an isolation barrier without optocouplers, eliminating LED aging and photodiode degradation concerns that plague legacy optoisolators. A digital isolator is a semiconductor device that transfers digital logic states across a galvanic isolation barrier using magnetic, capacitive, or optical coupling rather than a direct electrical connection. Digital isolators sit hierarchically as a sub-category of isolators within the signal conditioning family, which itself belongs to interface ICs and ultimately power management and protection ICs in semiconductor taxonomy. They protect low-voltage microcontrollers and sensitive logic from hazardous high voltages, ground potential differences, and fast transient events on industrial buses, motor drives, and medical equipment. Compared to optocouplers, iCoupler-based parts deliver tighter timing skew, higher CMTI, lower power, and 10x longer operational life. Key features include a 2.7 V to 5.5 V supply range on both sides of the barrier enabling voltage translation, 100 ns maximum propagation delay (tpLH/tpHL), 40 ns pulse-width distortion, and 2.5 ns typical rise/fall time. The wide-body SOIC-16 package provides the creepage and clearance required to achieve the 2500Vrms working voltage rating per UL and VDE reinforced-insulation standards. The ADUM1301ARWZ uses three independent transformer channels, each integrating a CMOS encoder/decoder pair, an RF oscillator, and a miniature transformer coil fabricated on-chip. Differential encoding and refresh-on-demand data transmission reject common-mode noise and ensure deterministic propagation delay across temperature. Typical applications include isolated SPI/UART interfaces for industrial PLCs, isolated gate-drive signaling for IGBT/MOSFET half-bridges, isolated ADC front-ends in motor control, and medical device patient-isolation barriers. The 1 Mbps rating covers most asynchronous serial links and slow synchronous buses. When designing with this device, place 0.1 µF decoupling capacitors on both VDDA/VDDB supply pins within 5 mm of the package, and route the two ground planes on opposite sides of the barrier maintaining at least 7.5 mm creepage per the wide-body SOIC land pattern. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
ADUM1301ARWZ-RL - 3-Ch 1Mbps Digital Isolator SOIC-16 | ADI
The Analog Devices ADUM1301ARWZ-RL is a triple-channel digital isolator built on Analog Devices iCoupler technology, providing 2500 Vrms isolation across three independent data channels in a 16-pin wide-body SOIC (RW-16) package. It supports a maximum guaranteed data rate of 1 Mbps (logic-side A: ARLO default high, output low) and a common-mode transient immunity (CMTI) of 25 kV/µs minimum, making it suitable for industrial fieldbus, motor drive, and isolated SPI/UART links. The -RL suffix denotes the 13-inch reel packaging option. What is a digital isolator? A digital isolator is a semiconductor device that transfers logic signals across an galvanically isolated barrier using chip-scale transformers (iCoupler), capacitive coupling, or GMR/Optocoupler methods, replacing legacy optocouplers with integrated CMOS drivers and receivers. Digital isolators belong to the broader hierarchy: digital isolator -> isolator -> interface IC -> signal chain IC -> semiconductor. Compared to optocouplers, iCoupler devices eliminate LED aging, slow propagation, and CTR degradation, while integrating multiple isolation channels and voltage translation in a single small-outline IC. Key features of the ADUM1301ARWZ-RL include a wide supply operation from 2.7 V to 5.5 V on either side, low default output low-high logic, and high channel-to-channel matching. The three-channel architecture is configured as 2 input/1 output or 1 input/2 output in the same RW-16 footprint, selectable via part-number suffix (ARW/ARWZ = 2/1 channels direction; BRW/BRWZ = 1/2 channels direction). The wide-body SOIC-16 footprint ensures 8 mm minimum creepage/clearance for reinforced insulation applications. The iCoupler architecture monolithically integrates planar transformers and CMOS logic on a single die, achieving propagation delay around 32-100 ns and pulse-width distortion below 40 ns. Channel-to-channel matching is typically within 5 ns, enabling reliable multi-channel timing-critical applications like isolated SPI between a microcontroller and a gate driver. The device also provides 5 kV human-body-model ESD protection on all pins. Typical applications include isolated SPI between a low-voltage MCU and a high-side gate driver in motor drives and solar inverters, isolated RS-485/RS-232 transceivers for industrial fieldbus, isolated DAC/ADC signal transmission, and medical equipment patient connections. The wide-body SOIC and 2500 Vrms rating also suit solar charge controllers and battery management systems. The -RL reel suffix is preferred for high-volume automated SMT assembly. When designing with this device, place 0.1 µF bypass capacitors close to each VDD pin and follow PCB layout guidelines in the manufacturer datasheet to maintain creepage and clearance for reinforced insulation. The wide-body SOIC-16 footprint matches industry-standard optocoupler pinouts for drop-in replacement. This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical PCB layout guidance not found in the standalone datasheet, optimized for engineers designing isolated interfaces.
ADUM1301ARWZ-RL7 - 3-Ch 2.5kV Digital Isolator | Analog Devices
The ADUM1301ARWZ-RL7 is a triple-channel digital isolator from Analog Devices, based on the proprietary iCoupler technology. It provides three independent isolation channels with a 2.5 kVrms isolation rating, supporting data rates up to 1 Mbps and a common-mode transient immunity (CMTI) of 25 kV/µs. The device operates with supply voltages from 2.7 V to 5.5 V on both sides, enabling voltage translation across the isolation barrier. It is housed in a 16-lead SOIC-W (0.295", 7.50 mm width) package, suitable for surface-mount assembly. A digital isolator is a component that transfers digital signals across an isolation barrier without a direct electrical connection, using capacitive, inductive, or optical coupling. It provides galvanic isolation to protect sensitive circuitry from high voltages, ground loops, and noise, while maintaining signal integrity. Digital isolators are essential in industrial automation, medical devices, and communication systems where safety and noise immunity are critical. They replace optocouplers in many applications, offering higher speed, better reliability, and lower power consumption. Key features of the ADUM1301ARWZ-RL7 include its 2.5 kVrms isolation voltage, 1 Mbps data rate, and 25 kV/µs CMTI, which ensures reliable operation in noisy environments. The device supports a wide supply range of 2.7 V to 5.5 V, making it compatible with both 3.3 V and 5 V logic systems. It also features a default output state that is high when the input is unpowered, ensuring fail-safe operation. The iCoupler technology uses monolithic transformers, eliminating the LED and photodiode aging issues found in optocouplers. Technically, the ADUM1301ARWZ-RL7 integrates high-speed CMOS and transformer isolation in a single package, providing superior performance compared to optocouplers. The device has a propagation delay of approximately 100 ns and a pulse width distortion of less than 10 ns, ensuring accurate signal transmission. It also offers a wide operating temperature range of -40°C to +105°C, suitable for industrial environments. The isolation barrier is rated for 2.5 kVrms per UL 1577, and the device is RoHS compliant. Typical applications include industrial fieldbus communication, isolated SPI/UART interfaces, motor control, and power supply isolation. The ADUM1301ARWZ-RL7 is ideal for systems requiring reliable signal isolation with minimal power consumption. Its high CMTI makes it suitable for applications with fast-switching power stages, such as motor drives and inverters. When designing with this device, ensure proper PCB layout to maintain isolation spacing and minimize parasitic capacitance. Place decoupling capacitors close to the VDD pins on both sides, and follow the manufacturer's guidelines for creepage and clearance distances to meet safety standards.
ADUM1310ARWZ - 3-Ch Digital Isolator 3750Vrms | Analog Devices
The ADUM1310ARWZ is a 3-channel digital isolator from Analog Devices, based on iCoupler technology that combines high-speed CMOS and monolithic air core transformer technology. It provides outstanding performance superior to optocoupler alternatives by eliminating LEDs and photodiodes, thereby removing design constraints related to nonlinear transfer functions, temperature drift, and aging. This device supports data rates up to 1 Mbps and offers a common-mode transient immunity (CMTI) of 25 kV/µs, ensuring reliable operation in noisy industrial environments. The ADUM1310ARWZ is housed in a 16-lead SOIC-W (wide body, 7.50 mm width) package, operating over a temperature range of -40°C to +105°C. Digital isolators are components that provide galvanic isolation between two circuits while allowing digital signals to pass across the isolation barrier. They are essential in applications where ground potential differences, noise, or safety requirements demand separation of high-voltage and low-voltage domains. The ADUM1310ARWZ belongs to the category of digital isolators, which are part of the broader interface IC family, and are used in industrial automation, motor control, and isolated communication interfaces. Key features include low power operation: at 5 V supply, it consumes 1.7 mA per channel maximum at 0-2 Mbps and 4.0 mA per channel at 2-10 Mbps; at 3 V, it consumes 1.0 mA per channel at 0-2 Mbps and 2.1 mA at 2-10 Mbps. The device supports a supply voltage range of 2.7 V to 5.5 V on both sides, making it versatile for mixed-voltage systems. It also features a patented refresh mechanism that ensures DC correctness in the absence of input logic transitions and during power-up/power-down conditions, a significant advantage over optocouplers. Technically, the ADUM1310ARWZ uses iCoupler technology with monolithic air core transformers to transmit data across the isolation barrier. This approach provides precise timing, low propagation delay, and high reliability. The device has a propagation delay of approximately 100 ns (as per Jotrin data), and it supports a default output state selection via a control pin, allowing designers to predetermine the output state when the input power (VDD1) is absent. Typical applications include industrial fieldbus isolation, isolated SPI/UART interfaces, motor drive signal isolation, and isolated power supply feedback. The high CMTI and low power consumption make it suitable for harsh industrial environments where noise immunity is critical. When designing with this device, ensure proper decoupling capacitors on both supply pins (VDD1 and VDD2) and follow the layout guidelines in the datasheet to maintain isolation performance. The default output state pin should be configured according to system safety requirements.
ADUM1310ARWZ-RL7 - 3-Ch Digital Isolator 3750Vrms | Analog Devices
The ADUM1310ARWZ-RL7 is a 3-channel digital isolator from Analog Devices, based on iCoupler technology. It provides galvanic isolation up to 3750Vrms, with a data rate of 1Mbps and common-mode transient immunity (CMTI) of 25kV/µs. The device operates from a supply voltage of 2.7V to 5.5V on both sides, enabling voltage translation across the isolation barrier. It is housed in a 16-lead SOIC-W (0.295", 7.50mm width) package, suitable for surface-mount assembly. A digital isolator is a component that transfers digital signals across an isolation barrier without a direct electrical connection, using capacitive, inductive, or optical coupling. It is essential in systems where safety, noise immunity, or ground potential differences require galvanic isolation. Digital isolators are part of the broader category of isolation components, which also include optocouplers and isolated amplifiers. They are critical in industrial automation, medical equipment, and communication interfaces. Key features of the ADUM1310ARWZ-RL7 include low power operation: 1.7mA per channel maximum at 5V operation (0-2Mbps) and 4.0mA per channel at 2-10Mbps; at 3V operation, 1.0mA per channel (0-2Mbps) and 2.1mA per channel (2-10Mbps). The device supports three independent isolation channels with a default channel configuration of 2/1 (two forward, one reverse). It also features a refresh mechanism to maintain output states in the absence of input transitions, ensuring reliable operation. Technically, the ADUM1310 uses monolithic air core transformers and high-speed CMOS to achieve superior performance compared to optocouplers, including higher data rates, lower power consumption, and better timing accuracy. The iCoupler technology eliminates the LED and photodiode aging issues, providing longer operational life and more stable performance over temperature. The device is specified for operation from -40°C to +105°C, making it suitable for industrial environments. Typical applications include SPI interfaces, RS-232/RS-485 transceivers, isolated data acquisition systems, and general-purpose signal isolation in industrial control, medical monitoring, and power conversion systems. The high CMTI of 25kV/µs ensures reliable operation in noisy environments with fast-switching power stages. When designing with this device, ensure proper PCB layout with adequate creepage and clearance distances for the required isolation rating. Place decoupling capacitors close to the VDD pins on both sides, and consider the input/output logic levels for voltage translation. The device is RoHS compliant and lead-free.
ADUM1311ARWZ - 3-Ch Digital Isolator 1Mbps | Analog Devices
The ADUM1311ARWZ is a 3-channel digital isolator from Analog Devices, based on iCoupler technology. It combines high-speed CMOS and monolithic air core transformer technology to provide isolation superior to optocouplers. This device supports data rates up to 1 Mbps, with a withstand voltage of 3750 Vrms and common-mode transient immunity of 25 kV/µs. It is available in a 16-pin SOIC-W package (0.295" width) and operates over a wide temperature range. Digital isolators are components that transmit digital signals across an isolation barrier, preventing DC current flow while allowing AC signal transfer. They are essential in systems requiring galvanic isolation for safety, noise immunity, or ground potential differences. The ADUM1311ARWZ uses iCoupler technology, which employs micro-transformers to couple signals, offering advantages over optocouplers such as higher speed, lower power, and better reliability. Key features include low power operation: 1.7 mA per channel max at 0-2 Mbps and 4.0 mA per channel max at 2-10 Mbps for 5V operation; for 3V operation, 1.0 mA per channel max at 0-2 Mbps. The device has a patented refresh feature that ensures DC correctness in the absence of input transitions and during power-up/power-down. It also allows the user to predetermine the default output state in the absence of input VDD1 power via a control pin. The ADUM1311ARWZ is designed for general-purpose isolation in industrial, medical, and communication systems. Its high CMTI and low power make it suitable for isolating SPI, UART, and other serial interfaces. The 16-pin SOIC-W package is widely used and easy to integrate. Typical applications include isolated data acquisition, motor control, power inverters, and isolated sensor interfaces. The device's robust isolation barrier protects sensitive electronics from high-voltage transients and ground loops. When designing with this device, ensure proper decoupling on both power supplies (VDD1 and VDD2) and consider the propagation delay for timing-sensitive applications. The default output state control pin should be set according to system safety requirements.
ADUM1311ARWZ-RL7 - 3-Ch Digital Isolator 3750Vrms | Analog Devices
The ADUM1311ARWZ-RL7 is a 3-channel digital isolator from Analog Devices, based on iCoupler technology. It provides 3750Vrms isolation with a data rate of 1Mbps and a common-mode transient immunity (CMTI) of 25kV/µs. The device operates from a supply voltage of 2.7V to 5.5V on both sides, enabling voltage translation across the isolation barrier. It is housed in a 16-pin SOIC-W (0.295", 7.50mm width) package, suitable for surface-mount assembly. A digital isolator is a component that transfers digital signals across an isolation barrier without a direct electrical connection, using capacitive, inductive, or optical coupling. It is a key element in systems requiring galvanic isolation for safety, noise immunity, or ground potential differences. Digital isolators are part of the broader category of isolation components, which also include optocouplers and isolated amplifiers. They are essential in industrial automation, medical devices, and communication systems where signal integrity and safety are critical. Key features of the ADUM1311ARWZ-RL7 include three independent isolation channels, a wide supply range of 2.7V to 5.5V, and a high CMTI of 25kV/µs, which ensures reliable operation in noisy environments. The device uses monolithic air core transformers, eliminating the need for LEDs and photodiodes, thus improving performance and reliability compared to optocouplers. It also supports data rates up to 10Mbps in other variants, but this specific model is rated for 1Mbps. Technically, the ADUM1311ARWZ-RL7 integrates high-speed CMOS and transformer technology, providing low propagation delay and high noise immunity. The isolation barrier is rated for 3750Vrms, making it suitable for reinforced insulation in many applications. The device is designed to meet safety standards such as UL, CSA, and VDE, though specific certifications should be verified from the datasheet. Typical applications include industrial fieldbus communication, isolated SPI interfaces, motor control, and power supply monitoring. The wide supply range and high CMTI make it ideal for use in harsh industrial environments where ground loops and electrical noise are common. It is also used in medical equipment for patient isolation and in renewable energy systems for inverter control. When designing with this device, ensure proper PCB layout to maintain isolation spacing and minimize parasitic capacitance. Place decoupling capacitors close to the supply pins, and follow the manufacturer's recommendations for creepage and clearance distances to meet safety standards.
ADUM131E1BRZ - 3-Ch 150Mbps Digital Isolator | Analog Devices
The Analog Devices ADUM131E1BRZ is a triple-channel digital isolator based on Analog Devices' iCoupler technology, delivering 150 Mbps data rate and 3.0 kVrms isolation in a 16-pin SOIC-N (0.154", 3.90 mm width) package. The ADuM131E1 variant operates from 2.5 V to 5.5 V on both sides and provides reinforced galvanic isolation across three independent channels configured as 2 transmit / 1 receive (2:1 channel direction). What is a digital isolator? A digital isolator is a semiconductor device that transfers logic-level signals across an isolation barrier while blocking DC and low-frequency transients. Within the broader isolation component hierarchy, digital isolators sit alongside optocouplers (legacy LED-photodiode based devices) as the preferred solution for SPI, I2C, RS-485, GPIO, and high-speed serial interfaces. iCoupler technology uses monolithic air-core transformers rather than LEDs, achieving 10x the data rate, 100x the common-mode transient immunity, and 10x the timing accuracy of optocouplers without the drive current and aging concerns of LED-based designs. Key features of the ADUM131E1BRZ include 75 kV/µs common-mode transient immunity (CMTI), 25 kV/µs typical CMTI at logic thresholds, a maximum propagation delay of 13 ns at 5 V, low pulse-width distortion of 2 ns, and 100 kV/µs surge capability. The 2:1 channel configuration (2 in / 1 out) suits applications where the host MCU is on the low-voltage domain and two sensor or actuator signals must be received from the high-voltage side. The fail-safe output drives a defined logic state when input supply is removed. Architecturally, the ADuM131E integrates four independent transformer channels (one per direction plus a power feedback channel) on a single die using Analog Devices' CMOS-monolithic air-core process. Each channel is independently isolated, and the wide-body SOIC-N package provides 8 mm minimum creepage distance to meet reinforced isolation requirements for industrial and renewable energy safety standards. Typical applications include isolated SPI between microcontroller and gate driver in motor drives, isolated RS-485 transceivers in industrial fieldbus, isolated GPIO in solar inverters and battery management, isolated digital interfaces to setpoint levels in PLC systems, and patient-isolated data acquisition in medical electronics. The 150 Mbps speed grade easily handles standard SPI at 10 MHz, CAN-FD, and isolated UART with margin. When designing with the ADUM131E1BRZ, place 0.1 µF decoupling capacitors at each VDD pin as close to the IC as possible. Ensure the high-voltage and low-voltage ground planes are physically separated (typically with a 4 mm gap) to maintain isolation. The high CMTI rating (75 kV/µs) allows the device to operate adjacent to fast-switching power stages such as SiC MOSFETs and IGBTs without latchup. This page synthesizes distributor pricing, drop-in iCoupler alternatives from Analog Devices and competitor manufacturers, and practical PCB layout guidance not found in the manufacturer datasheet alone.
ADUM1400ARWZ - Quad-Channel Digital Isolator | Analog Devices
The ADUM1400ARWZ is a quad-channel digital isolator from Analog Devices, based on iCoupler technology. It provides 2500Vrms isolation with four unidirectional channels, all in a 16-pin SOIC-W package. This device supports data rates up to 1Mbps and features a common-mode transient immunity (CMTI) of 25kV/µs, ensuring reliable operation in noisy industrial environments. Digital isolators are components that transmit digital signals across an isolation barrier, preventing DC current flow while allowing AC signals to pass. They are essential in applications requiring galvanic isolation for safety, ground loop elimination, and noise reduction. The ADUM1400ARWZ uses monolithic air core transformers and high-speed CMOS, offering superior performance compared to traditional optocouplers, such as higher data rates, lower power consumption, and better reliability. Key features include four independent isolation channels, a wide supply voltage range of 2.7V to 5.5V, and a temperature range of -40°C to +105°C. The device is RoHS compliant and available in a standard SOIC-16 package, making it easy to integrate into existing designs. Its low propagation delay and high CMTI make it suitable for applications where signal integrity is critical. The ADUM1400ARWZ operates with a typical quiescent current of 1.3mA per channel, contributing to low overall power dissipation. The isolation barrier is rated for 2500Vrms, providing robust protection against voltage transients. The device also features an enable function on the input side, allowing the outputs to be placed in a high-impedance state for multiplexing or power saving. Typical applications include industrial fieldbus communication, motor control, power supply isolation, and medical equipment. In motor drives, the ADUM1400ARWZ isolates the control signals from the high-voltage power stage, preventing noise from corrupting the logic signals. In medical devices, it provides patient isolation, ensuring safety and compliance with stringent standards. When designing with this device, ensure that the input and output grounds are properly separated and that bypass capacitors are placed close to the VDD pins. The enable pin can be used to disable the outputs during power-up sequencing, preventing glitches on the isolated side.