ADUM4154ARIZ - 5kV SPI Digital Isolator | Analog Devices
Référence : ADUM4154ARIZ ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $4.85 | $4,85 |
| 10 | $4.36 | $43,60 |
| 100 | $3.88 | $388,00 |
| 500 | $3.49 | $1 745,00 |
| 1 000 | $3.1 | $3 100,00 |
ADUM4154ARIZ Présentation
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.
Alternatives de remplacement direct pour ADUM4154ARIZ — 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 ADUM4154ARIZ (même facteur de forme et même empreinte) — différant par Number of Channels, Isolation Voltage, Package, Data Rate, SPI Clock Rate.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ADUM4154BRIZ
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$4.16 / unité
Voir la fiche technique →ADUM3154ARSZ
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$4.18 / unité
Voir la fiche technique →ADUM3154BRSZ
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$3.1 / unité
Voir la fiche technique →ADUM4154ARIZ Spécifications
| Number of Channels | 4 |
| Isolation Voltage | 5000 Vrms |
| Débit de données | 2 Mbps (DigiKey) / 17 MHz SPI clock (datasheet) |
| CMTI | 25 kV/µs |
| Supply Voltage VDD1 | 4.5 V to 5.5 V |
| Supply Voltage VDD2 | 3.0 V to 3.6 V |
| Température de fonctionnement | -40°C to +125°C |
| Boîtier | 20-SOIC (0.295", 7.50mm Width) |
| Type de montage | Surface Mount |
| Technology | iCoupler |
| Number of Slave Devices Supported | 4 |
| Address Pins | 2 |
| Statut RoHS | Compliant |
Configuration des broches de ADUM4154ARIZ
| Broche 1 | VDD1 — Primary supply voltage (4.5V to 5.5V) |
| Broche 2 | GND1 — Primary ground |
| Broche 3 | CLK — SPI clock input |
| Broche 4 | MO/SI — Master out, slave in data |
| Broche 5 | MI/SO — Master in, slave out data |
| Broche 6 | SS1 — Slave select 1 |
| Broche 7 | SS2 — Slave select 2 |
| Broche 8 | SS3 — Slave select 3 |
| Broche 9 | SS4 — Slave select 4 |
| Broche 10 | ADDR0 — Address pin 0 |
| Broche 11 | ADDR1 — Address pin 1 |
| Broche 12 | GND2 — Secondary ground |
| Broche 13 | VDD2 — Secondary supply voltage (3.0V to 3.6V) |
| Broche 14 | EN — Enable pin (active high) |
| Broche 15 | NC — No connect |
| Broche 16 | NC — No connect |
| Broche 17 | NC — No connect |
| Broche 18 | NC — No connect |
| Broche 19 | NC — No connect |
| Broche 20 | NC — No connect |
Applications typiques
ADUM4154ARIZ convient pour 6 applications: Industrial Automation, Motor Control, Data Acquisition Systems, Medical Equipment, Renewable Energy Systems, Test and Measurement.
Industrial Automation
The ADUM4154ARIZ provides galvanic isolation for SPI communication between PLCs, sensors, and actuators in industrial environments. Its 5kV isolation and 25kV/µs CMTI ensure reliable operation in the presence of motor noise and ground loops. The 17MHz SPI clock supports high-speed data acquisition, while the four slave select lines enable connection of multiple sensors to a single controller. The wide temperature range (-40°C to +125°C) suits harsh factory floors.
Recommandé
Motor Control
In motor control systems, the ADUM4154ARIZ isolates the SPI interface between the microcontroller and gate drivers or encoder interfaces. The high CMTI (25kV/µs) prevents false triggering from fast voltage transients generated by PWM switching. The 5kV isolation protects low-voltage control circuitry from high-voltage motor drives. The low propagation delay ensures accurate timing for real-time control loops, and the four slave select lines allow connection of multiple encoders or current sensors.
Recommandé
Data Acquisition Systems
The ADUM4154ARIZ is ideal for data acquisition systems requiring isolation between analog front-ends and digital controllers. It supports SPI clock rates up to 17MHz, enabling high-throughput sampling from ADCs and DACs. The four slave select lines allow multiple converters to share a single SPI bus, reducing pin count. The 5kV isolation ensures safety in medical and industrial monitoring equipment, while the low jitter maintains signal integrity for precise measurements.
Recommandé
Medical Equipment
In medical devices, the ADUM4154ARIZ provides patient isolation for SPI-based sensors and monitors. The 5kV isolation meets safety standards for patient-connected equipment, preventing leakage currents. The low power consumption and small SOIC-20 package make it suitable for portable devices. The wide temperature range and high reliability of iCoupler technology ensure long-term operation in critical care environments.
Recommandé
Renewable Energy Systems
The ADUM4154ARIZ is used in solar inverters and wind turbine controllers to isolate SPI communication between the main controller and power stage monitoring circuits. The high CMTI (25kV/µs) ensures reliable operation in the presence of high-voltage switching transients. The 5kV isolation protects low-voltage control electronics from high-voltage DC buses. The four slave select lines enable connection of multiple voltage and current sensors for comprehensive system monitoring.
Recommandé
Test and Measurement
In test and measurement equipment, the ADUM4154ARIZ isolates SPI interfaces between measurement front-ends and digital processors. The 17MHz SPI clock supports high-speed data transfer for oscilloscopes and data loggers. The low propagation delay and jitter ensure accurate timing for synchronized measurements. The 5kV isolation protects sensitive measurement circuits from ground loops and noise, improving measurement accuracy.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ADUM4154ARIZ — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ADUM4154BRIZ | ADUM3154ARSZ | ADUM3154BRSZ | ISO7741DW | Si8641BB-B-IS1 |
|---|---|---|---|---|---|---|
| Package | 20-SOIC (0.295", 7.50mm Width) | 20-SOIC (same) | 20-SOIC (same) | 20-SOIC (same) | SOIC-16 (different) | SOIC-16 (different) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Skyworks Solutions |
| Isolation Voltage | 5000 Vrms | 5000 Vrms | 5000 Vrms | 5000 Vrms | 5000 Vrms | 5000 Vrms |
| Number of Channels | 4 | 4 | 4 | 4 | 4 | 4 |
| Data Rate | 2 Mbps (DigiKey) / 17 MHz SPI clock | 2 Mbps / 17 MHz | 2 Mbps / 17 MHz | 2 Mbps / 17 MHz | 100 Mbps | 150 Mbps |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 100 kV/µs | 50 kV/µs |
| Number of Slave Devices | 4 | 4 | 2 | 2 | N/A (not SPI-specific) | N/A (not SPI-specific) |
| Supply Voltage VDD1 | 4.5V to 5.5V | 4.5V to 5.5V | 4.5V to 5.5V | 4.5V to 5.5V | 2.25V to 5.5V | 2.5V to 5.5V |
Principaux différenciateurs
- Supports up to four SPI slave devices (vs ADUM3154ARSZ)
- High CMTI of 25 kV/µs (vs ISO7741DW)
- SPI-optimized with integrated slave select routing (vs Si8641BB-B-IS1)
Notes de conception
For 5kV isolation, ensure adequate creepage and clearance distances on the PCB. The SOIC-20 package has a minimum creepage of 8mm, but for reinforced isolation, maintain at least 8mm between primary and secondary sides. Use a slot or cutout under the isolator to increase creepage distance.
Decouple both VDD1 and VDD2 with 0.1µF ceramic capacitors placed as close as possible to the pins. Additionally, use a 10µF bulk capacitor on each supply if the power source is far. This ensures stable operation and reduces noise coupling across the isolation barrier.
Do not exceed the absolute maximum ratings for supply voltages. Ensure that the voltage differential between any two pins does not exceed the isolation rating. Also, avoid floating the enable pin; tie it to VDD1 or VDD2 as appropriate to ensure the device is always enabled or disabled as intended.
Informations de conformité
RoHS compliant per Analog Devices product page. No AEC-Q100 qualification indicated.
