ADUM1446ARWZ - Micropower Quad Digital Isolator | Analog Devices
Référence : ADUM1446ARWZ ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $3.5 | $3,50 |
| 10 | $3.15 | $31,50 |
| 100 | $2.8 | $280,00 |
| 500 | $2.45 | $1 225,00 |
| 1 000 | $2.1 | $2 100,00 |
ADUM1446ARWZ Présentation
Digital isolators are components that transmit digital signals across an isolation barrier, providing galvanic isolation to protect sensitive circuitry from high voltages, noise, and ground loops. They are essential in industrial automation, medical devices, and communication systems where safety and signal integrity are paramount. The ADUM1446ARWZ uses Analog Devices' iCoupler technology, which combines high-speed CMOS and monolithic transformer isolation to achieve reliable performance without the wear-out mechanisms of optocouplers.
Key features include a 2.5 kVrms isolation rating, a wide operating temperature range of -40°C to +125°C, and a compact 16-lead SOIC-W package. The device supports both 3.3 V and 5 V logic levels, making it versatile for mixed-voltage systems. Its low propagation delay and high CMTI ensure robust operation in noisy industrial environments.
Technically, the ADUM1446ARWZ integrates four independent isolation channels with a refresh mechanism that reduces power consumption when the input signal is static. The enable pins (ENx) allow each channel to be individually controlled, further optimizing power usage. The device is fully specified over the recommended operating range of 3.0 V to 3.6 V, ensuring consistent performance across temperature and voltage variations.
Typical applications include isolated SPI interfaces, industrial fieldbus communication, medical patient monitoring, and isolated sensor data acquisition. The low power consumption and high reliability make it suitable for portable and remote monitoring equipment.
When designing with the ADUM1446ARWZ, ensure proper PCB layout with adequate creepage and clearance distances to maintain the isolation rating. Bypass capacitors should be placed close to the VDD pins to minimize noise and ensure stable operation.
Alternatives de remplacement direct pour ADUM1446ARWZ — 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 ADUM1446ARWZ (même facteur de forme et même empreinte) — différant par Package, Current per Channel (ENx=0), Current per Channel (ENx=1), Output Type.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ADUM1445ARWZ
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$2.1 / unité
Voir la fiche technique →ADUM1447ARWZ
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$5.6 / unité
Voir la fiche technique →ISO7741DW
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
Si8641BB-B-IS1
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
ADUM1446ARWZ Spécifications
| Number of Channels | 4 |
| Isolation Voltage | 2500 Vrms |
| Débit de données | 2 Mbps |
| Common-Mode Transient Immunity (CMTI) | 25 kV/µs |
| Supply Voltage (VDD1/VDD2) | 3.0 V to 3.6 V |
| Quiescent Current per Channel (ENx=0) | <10 µA |
| Quiescent Current per Channel (ENx=1) | <1 µA |
| Plage de température de fonctionnement | -40°C to +125°C |
| Boîtier | 16-Lead SOIC-W |
| Type de montage | Surface Mount |
| Statut RoHS | Compliant |
| Isolation Rating | 2500 Vrms |
Configuration des broches de ADUM1446ARWZ
| Broche 1 | VDD1 — Supply voltage, side 1 |
| Broche 2 | GND1 — Ground, side 1 |
| Broche 3 | VIA — Input channel A, side 1 |
| Broche 4 | VIB — Input channel B, side 1 |
| Broche 5 | VIC — Input channel C, side 1 |
| Broche 6 | VID — Input channel D, side 1 |
| Broche 7 | EN1 — Enable, side 1 |
| Broche 8 | GND1 — Ground, side 1 |
| Broche 9 | GND2 — Ground, side 2 |
| Broche 10 | EN2 — Enable, side 2 |
| Broche 11 | VOD — Output channel D, side 2 |
| Broche 12 | VOC — Output channel C, side 2 |
| Broche 13 | VOB — Output channel B, side 2 |
| Broche 14 | VOA — Output channel A, side 2 |
| Broche 15 | GND2 — Ground, side 2 |
| Broche 16 | VDD2 — Supply voltage, side 2 |
Applications typiques
ADUM1446ARWZ convient pour 6 applications: Industrial Fieldbus Communication, Medical Patient Monitoring, Isolated SPI Interface, Battery-Powered Sensor Nodes, Isolated Power Supply Control, Automotive Battery Management.
Industrial Fieldbus Communication
The ADUM1446ARWZ provides galvanic isolation for industrial fieldbus interfaces such as RS-485 and CAN. Its 2 Mbps data rate and 25 kV/µs CMTI ensure reliable communication in noisy factory environments. The low quiescent current (<10 µA per channel) minimizes power consumption in remote I/O modules. The 2.5 kVrms isolation protects microcontrollers from ground loops and voltage transients. When used with a transceiver like the ADM2483, it enables robust, isolated communication links.
Recommandé
Medical Patient Monitoring
In medical devices, the ADUM1446ARWZ isolates sensitive patient-connected sensors from the main control unit, ensuring safety and signal integrity. Its 2.5 kVrms isolation meets medical safety standards, while the low power consumption extends battery life in portable monitors. The wide operating temperature range (-40°C to +125°C) supports reliable operation in clinical environments. The device's high CMTI prevents false triggering from defibrillator pulses or electrosurgical equipment.
Recommandé
Isolated SPI Interface
The ADUM1446ARWZ is ideal for isolating SPI buses between microcontrollers and peripheral devices such as ADCs and DACs. Its 2 Mbps data rate supports common SPI clock frequencies, and the four channels can be configured for MOSI, MISO, SCK, and CS signals. The low propagation delay ensures minimal timing skew, and the enable pins allow power saving when the SPI bus is idle. This isolation prevents ground loops and noise from corrupting sensitive analog measurements.
Recommandé
Battery-Powered Sensor Nodes
For wireless sensor nodes, the ADUM1446ARWZ provides isolation with minimal power drain. Its quiescent current of less than 1 µA per channel (with refresh disabled) is critical for extending battery life. The device can isolate digital sensors, wake-up signals, and communication interfaces while maintaining a small footprint. The 3.0 V to 3.6 V supply range is compatible with Li-ion batteries and energy harvesting circuits.
Recommandé
Isolated Power Supply Control
The ADUM1446ARWZ can be used to isolate control signals in power supply designs, such as feedback loops and enable signals. Its high CMTI ensures stable operation in the presence of switching noise. The low power consumption reduces the burden on the isolated side's power supply. The device's four channels can carry PWM signals, fault indicators, and control commands across the isolation barrier.
Recommandé
Automotive Battery Management
In automotive battery management systems, the ADUM1446ARWZ isolates cell monitoring circuits from the main controller. Its 2.5 kVrms isolation and wide temperature range meet automotive requirements. The low power consumption is beneficial for always-on monitoring. The device's high CMTI ensures reliable communication in the presence of motor noise and load transients.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ADUM1446ARWZ — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ADUM1446ARQZ | ADUM1446ARSZ | ADUM1445ARWZ | ADUM1447ARWZ | ISO7741DW | Si8641BB-B-IS1 |
|---|---|---|---|---|---|---|---|
| Package | 16-Lead SOIC-W | 16-SSOP | 20-SSOP | 16-Lead SOIC-W | 16-Lead SOIC-W | 16-SOIC | 16-SOIC |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Skyworks Solutions |
| Isolation Voltage | 2500 Vrms | 2500 Vrms | 3750 Vrms | 2500 Vrms | 2500 Vrms | 5000 Vrms | 2500 Vrms |
| Data Rate | 2 Mbps | 2 Mbps | 2 Mbps | 2 Mbps | 2 Mbps | 100 Mbps | 150 Mbps |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 100 kV/µs | 35 kV/µs |
| Quiescent Current per Channel | <10 µA (ENx=0), <1 µA (ENx=1) | <10 µA (ENx=0), <1 µA (ENx=1) | <10 µA (ENx=0), <1 µA (ENx=1) | <10 µA (ENx=0), <1 µA (ENx=1) | <10 µA (ENx=0), <1 µA (ENx=1) | 1.5 mA per channel | 1.6 mA per channel |
| Supply Voltage Range | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 2.25 V to 5.5 V | 2.5 V to 5.5 V |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -55°C to +125°C | -40°C to +125°C |
Principaux différenciateurs
- Ultra-low power consumption (vs ISO7741DW)
- Micropower operation with enable pins (vs Si8641BB-B-IS1)
- Same-package drop-in alternatives (vs ADUM1446ARQZ)
Notes de conception
For optimal performance, place bypass capacitors (0.1 µF and 10 µF) close to the VDD1 and VDD2 pins. Ensure a solid ground plane on both sides of the isolation barrier. Maintain adequate creepage and clearance distances (at least 4 mm for 2500 Vrms) between the isolated sides to meet safety standards.
The ADUM1446ARWZ consumes very low power, but the supply voltage must be within 3.0 V to 3.6 V. Use low-dropout regulators (LDOs) to provide clean power. If the internal refresh is disabled (ENx=1), the quiescent current drops to <1 µA per channel, which is beneficial for battery-powered designs.
Do not exceed the absolute maximum ratings for supply voltage or input/output voltages. Ensure that the enable pins (EN1, EN2) are properly configured to avoid unintended shutdown. When using the device in high-noise environments, consider adding ferrite beads on the power supply lines to reduce EMI.
Informations de conformité
RoHS compliant per Analog Devices product page. Other compliance data not specified in the provided data.
