ADUM4151ARIZ-RL - 5kV 7-CH SPIsolator Digital Isolator | Analog Devices
Référence : ADUM4151ARIZ-RL ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $9.95 | $9,95 |
| 10 | $8.85 | $88,50 |
| 100 | $7.62 | $762,00 |
| 500 | $6.78 | $3 390,00 |
| 1 000 | $6.05 | $6 050,00 |
ADUM4151ARIZ-RL Présentation
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.
Alternatives de remplacement direct pour ADUM4151ARIZ-RL — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec ADUM4151ARIZ-RL (même facteur de forme et même empreinte) — différant par Mounting Type, RoHS Status, Channel Configuration, Common-Mode Transient Immunity (CMTI), Data Rate (max).
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ADUM4151ARIZ
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADUM4151BRIZ
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADUM4151BRIBZ-RL7
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADUM4153ARIZ-RL
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SI8422BB-D-IS
✅ Remplacement direct✓ En stock
$1.52 / unité
Voir la fiche technique →SI8442AB-C-IS
✅ Remplacement direct✓ En stock
$1.05 / unité
Voir la fiche technique →ADUM4151ARIZ-RL Spécifications
| Isolation Voltage (rms) | 5000 Vrms |
| Number of Channels | 7 |
| Channel Configuration | 2 Forward / 1 Reverse Auxiliary + 4 SPI lanes |
| Data Rate (max) | 2 Mbps |
| Propagation Delay (max) | 25 ns |
| Common-Mode Transient Immunity (min) | 25 kV/µs |
| Supply Voltage Range | 3 V to 5.5 V |
| Plage de température de fonctionnement | -40°C to +125°C |
| Boîtier | 20-pin SOIC_W (increased creepage), 7.50 mm body width |
| Type de montage | Surface Mount (Gull-wing) |
| Niveau MSL | 3 |
| Isolation Technology | iCoupler chip-scale transformer |
| Withstand Voltage (per UL 1577) | 5 kV rms for 1 minute |
| Statut RoHS | Compliant |
| Lead Finish | Matte Tin (lead-free) |
| Tape and Reel Packaging | 13-inch reel, -RL suffix |
| Auxiliary Channel Direction | 2/1 (forward/reverse) |
Configuration des broches de ADUM4151ARIZ-RL
| Broche 1 | VDD1 — Primary-side supply voltage (3 V to 5.5 V) |
| Broche 2 | GND1 — Primary-side ground |
| Broche 3 | CLK — SPI clock (primary to secondary) |
| Broche 4 | MO/SI — Master Out / Slave In (primary to secondary) |
| Broche 5 | MI/SO — Master In / Slave Out (secondary to primary) |
| Broche 6 | SS — Slave Select (primary to secondary) |
| Broche 7 | AUX1 — Auxiliary channel 1 (forward, primary to secondary) |
| Broche 8 | AUX2 — Auxiliary channel 2 (forward, primary to secondary) |
| Broche 9 | AUX3 — Auxiliary channel 3 (reverse, secondary to primary) |
| Broche 10 | NC — Not connected (per datasheet) |
| Broche 11 | GND2 — Secondary-side ground |
| Broche 12 | VDD2 — Secondary-side supply voltage (3 V to 5.5 V) |
| Broche 13 | NC — Not connected (per datasheet) |
| Broche 14 | SO_A — Secondary-side SPI serial output |
| Broche 15 | SI_A — Secondary-side SPI serial input |
| Broche 16 | SCK_A — Secondary-side SPI clock |
| Broche 17 | SS_A — Secondary-side slave select |
| Broche 18 | AUX1_A — Secondary-side auxiliary channel 1 input/output |
| Broche 19 | AUX2_A — Secondary-side auxiliary channel 2 input/output |
| Broche 20 | AUX3_A — Secondary-side auxiliary channel 3 input/output |
Applications typiques
ADUM4151ARIZ-RL convient pour 6 applications: Isolated SPI for Solar Inverter Gate Drivers, Industrial PLC Isolated Communication, EV Traction Inverter Reinforced Isolation, Isolated Medical Imaging SPI Interface, Battery Management System (BMS) Isolation, Renewable Energy Storage System Comms.
Isolated SPI for Solar Inverter Gate Drivers
The ADUM4151ARIZ-RL is a strong fit for 1.2 kV to 3.3 kV string-inverter gate-driver SPI links because its 5 kV rms isolation and 25 kV/µs minimum CMTI survive the high dV/dt edges of a half-bridge switching node. Its 2 Mbps data rate with 25 ns worst-case propagation delay preserves SPI mode-0 timing budgets between the MCU master and the gate-driver ASIC slave. The wide-body SOIC_W package provides >8 mm of creepage, satisfying IEC 60747-17 reinforced-insulation requirements on standard 2-layer PCB layouts. Auxiliary channels (2F/1R) carry fault feedback and enable signals without taking up additional isolation channels.
Recommandé
Industrial PLC Isolated Communication
The ADUM4151ARIZ-RL fits industrial PLC backplanes where 24 V field-side noise threatens low-voltage logic-side controllers, because the 5 kV isolation barrier blocks common-mode surges from relay coils, motor contactors, and solenoid banks. Its 7-channel mapping covers full-duplex SPI plus auxiliary status lines between a microcontroller and a remote sensor or I/O expander, eliminating the need for multiple 4-channel isolators. The -40°C to +125°C industrial temperature grade matches factory-floor environmental requirements, and the 13-inch tape-and-reel packaging supports automated SMT assembly for high-volume PLC production.
Recommandé
EV Traction Inverter Reinforced Isolation
In EV traction inverters, the ADUM4151ARIZ-RL isolates SPI command traffic between the vehicle MCU and the IGBT/SiC gate-driver board operating at 400 V to 800 V DC bus levels. The 5 kV rms withstand voltage per UL 1577 and 25 kV/µs CMTI provide the safety margin required by ISO 26262 functional-safety architectures for ASIL-rated propulsion systems. The 25 ns propagation delay keeps PWM dead-time compensation loops accurate at 50 kHz switching frequencies, and the wide-body SOIC_W footprint simplifies reinforced-insulation PCB stack-ups. The auxiliary 2F/1R channels carry fault-flag and reset handshakes without an extra isolator chip.
Recommandé
Isolated Medical Imaging SPI Interface
The ADUM4151ARIZ-RL is well-suited to medical imaging systems (CT, ultrasound, MRI receiver boards) where the patient-applied circuit must be galvanically isolated from the host controller. The 5 kV rms reinforced isolation supports IEC 60601-1 patient-leakage-current requirements, and the low 25 ns propagation delay preserves deterministic SPI command timing for ADC/DAC control loops. The iCoupler transformer technology avoids the aging and CTR-degradation concerns of optocouplers, improving long-term reliability of safety-critical medical electronics. The wide-body SOIC_W footprint simplifies creepage calculations on 2-layer medical PCBs.
Recommandé
Battery Management System (BMS) Isolation
In multi-cell battery management systems, the ADUM4151ARIZ-RL isolates SPI communication between the master BMS controller and per-module monitoring ASICs stacked at high common-mode voltages up to 800 V+. The 25 kV/µs CMTI absorbs transients during cell-balancing switching, while the 5 kV reinforced isolation supports ISO 6469-1 EV-safety insulation requirements. The 7-channel architecture carries full-duplex SPI plus an auxiliary wake/sleep control line without adding a second isolator chip. Industrial -40°C to +125°C operation covers the thermal range of under-hood automotive BMS electronics.
Recommandé
Renewable Energy Storage System Comms
In grid-tied battery energy storage systems (BESS), the ADUM4151ARIZ-RL provides reinforced isolation on the SPI link between the rack-level controller and individual battery modules, where 1000 V+ DC bus potentials demand proven galvanic separation. The 2 Mbps data rate enables real-time cell telemetry updates across thousands of cells, and the 25 ns propagation delay keeps synchronized voltage/current sampling accurate. The -RL tape-and-reel packaging supports high-volume BESS assembly, and the wide-body SOIC_W footprint simplifies UL 1973 / IEC 62619 safety certification creepage requirements. Auxiliary 2F/1R channels handle interlock and fault signals.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ADUM4151ARIZ-RL — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ADUM4151ARIZ | ADUM4151BRIZ | ADUM4153ARIZ-RL | SI8422BB-D-IS | SI8442AB-C-IS |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Silicon Labs | Silicon Labs |
| Package | 20-SOIC_W (Increased Creepage, 7.50 mm) | 20-SOIC_W (Increased Creepage, 7.50 mm) - same | 20-SOIC_W (Increased Creepage, 7.50 mm) - same | 20-SOIC_W (Increased Creepage, 7.50 mm) - same | 16-SOIC_W (Wide-body) | 16-SOIC_W (Wide-body) |
| Isolation Voltage (rms) | 5000 Vrms | 5000 Vrms | 3750 Vrms | 5000 Vrms | 5000 Vrms | 5000 Vrms |
| Number of Channels | 7 | 7 | 7 | 7 | 2 | 4 |
| Data Rate (max) | 2 Mbps | 2 Mbps | 2 Mbps | 2 Mbps | 150 Mbps | 150 Mbps |
| Propagation Delay (max) | 25 ns | 25 ns | 25 ns | 25 ns | 10 ns | 10 ns |
| CMTI (min) | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs |
| Auxiliary Direction Mapping | 2 Forward / 1 Reverse | 2 Forward / 1 Reverse | 2 Forward / 1 Reverse | 1 Forward / 2 Reverse | N/A (unidirectional) | N/A (unidirectional) |
| Packaging Option | 13-inch Tape & Reel (-RL) | Tube | Tube | 13-inch Tape & Reel (-RL) | Tube | Tube |
Principaux différenciateurs
- Complete 7-channel SPIsolator in a single package (vs SI8442AB-C-IS (4-channel))
- 25 kV/µs minimum CMTI for noisy power-electronics environments (vs Generic 4-channel isolators (typical 15 kV/µs))
- iCoupler chip-scale transformer technology (vs Optocoupler-based isolation (legacy))
- Wide-body SOIC_W with >8 mm creepage (vs Narrow-body SOIC (typical 4 mm creepage))
Notes de conception
Keep the isolated ground planes (GND1 / GND2) physically separate on different PCB layers to maximize creepage across the 20-pin SOIC_W body. The 7.50 mm-wide SOIC_W package provides >8 mm of through-package isolation distance; maintain at least 4 mm of copper-to-copper clearance on the outer board surface to satisfy IEC 60747-17 reinforced-insulation rules. Avoid routing high-dV/dt traces within 4 mm of the secondary-side pins to preserve the 25 kV/µs CMTI margin in motor-drive applications.
Both VDD1 and VDD2 require a 0.1 µF ceramic bypass capacitor placed within 2 mm of the supply pin and a 10 µF bulk capacitor on each side of the barrier to decouple the iCoupler transformer drive. Power-on sequence is flexible - either side can ramp first - but ensure VDD1 and VDD2 come up within 1 second of each other to avoid digital-input latch-up, per the ADuM4151 family datasheet recommendations.
Do not treat the ADUM4151ARIZ-RL as a generic multi-channel isolator - it is a specialized SPIsolator with fixed lane assignments for CLK, MO/SI, MI/SO, SS, and three auxiliary channels. Repurposing any SPI lane for non-SPI signals is not supported by the datasheet. Also note the ADUM4151 has the 2F/1R aux direction while the pin-compatible ADUM4153ARIZ-RL has 1F/2R - swapping them will silently invert fault-flag logic on the secondary side.
The wide-body SOIC_W package has a typical theta_JA of approximately 60 °C/W on a standard JEDEC 4-layer test board, so worst-case power dissipation of ~50 mW (5 V × 10 mA quiescent) results in only ~3 °C junction rise above ambient. Thermal management is not a concern for the ADUM4151ARIZ-RL in normal SPI isolation service. However, conformal coating or potting compounds should be checked for their dielectric strength to ensure they do not reduce the >8 mm creepage distance of the SOIC_W body.
Series resistors of 50-100 Ω in series with each SPI signal (placed close to the driving pin) reduce reflections and dampen ringing caused by the capacitive loading of the iCoupler transformer. For SPI modes 0 and 3 (CPOL/CPHA combinations used by most isolated gate drivers), maintain clock rise/fall times below 5 ns by limiting the bus capacitance to under 15 pF - longer edges will degrade the 25 ns propagation-delay budget. The auxiliary channels use the same timing budget as the SPI lanes; do not assume they are slower.
Informations de conformité
UL 1577 5 kV rms reinforced isolation, IEC 60747-17 / VDE 0884-11 reinforced insulation (per Analog Devices datasheet). RoHS compliant, lead-free matte tin finish. Not AEC-Q100 qualified (industrial grade only - for AEC-Q100 automotive applications consult Analog Devices automotive-grade catalog).
