ADUM5211ARSZ-RL7 - 2-Ch Digital Isolator w/ isoPower DC/DC | ADI
Référence : ADUM5211ARSZ-RL7 ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $9.62 | $9,62 |
| 10 | $7.49 | $74,90 |
| 100 | $6.37 | $637,00 |
| 500 | $5.78 | $2 890,00 |
| 1 000 | $6.26 | $6 260,00 |
| 10 000 | $6.26 | $62 600,00 |
ADUM5211ARSZ-RL7 Présentation
A digital isolator is a semiconductor device that transfers logic signals across a galvanic isolation barrier using chip-scale micro-transformers instead of optocouplers or discrete transformers. In the system hierarchy, it sits between an MCU/processor on the logic side and a sensor, gate driver, or field-side circuitry on the protected side, providing both functional safety (signal integrity) and safety isolation (creepage/clearance for high-voltage transients). The ADUM5211 extends this role by also providing isolated power in a single IC.
Key features include low power consumption suitable for 3.3 V or 5 V logic rails, channel-to-channel matching of propagation delay, and -40 °C to +105 °C industrial temperature operation. The iCoupler chip-scale transformer technology replaces optocouplers, delivering faster data rates (1 Mbps) without LED degradation. A regulated feedback loop holds the secondary output within tolerance across load and temperature variations.
The architecture combines planar transformer windings for the dc-to-dc converter with logic-side transformers for the digital channels on a single die. The converter operates as a peak-current-mode flyback-equivalent topology with internal MOSFETs, and the digital channels use differential signaling across the isolation barrier. SSOP-20 packaging gives a compact footprint while maintaining 8 mm of creepage for reinforced isolation when routed on standard PCB processes.
Typical applications include isolated SPI interfaces to gate drivers, RS-485/RS-232 isolation in industrial PLCs, isolated power for 4-20 mA loops, and isolated MCU communication in solar inverter gate-driver bias supplies. By co-integrating power and signal isolation, the ADUM5211 reduces BOM count, board area, and BOM-driven failure modes compared to optocoupler + discrete DC-DC solutions.
When designing with the ADUM5211, ensure adequate decoupling on both primary (VDD1) and secondary (VDD2/VISO) rails with 0.1 µF and 10 µF ceramic capacitors placed close to the pins. The isolated output voltage is set by an external resistor divider on the secondary side; do not exceed the 100 mA maximum output current of the integrated DC-DC, and add a soft-start capacitor if load inrush exceeds 50 mA.
Alternatives de remplacement direct pour ADUM5211ARSZ-RL7 — 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 ADUM5211ARSZ-RL7 (même facteur de forme et même empreinte) — différant par Common-Mode Transient Immunity (CMTI), Package, RoHS Status, Number of Channels, Operating Temperature Range.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ADUM5210ARSZ-RL7
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADUM5212ARSZ-RL7
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADUM5211ARSZ
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADM3251EARWZ
✅ Remplacement direct✓ En stock
$7.05 / unité
Voir la fiche technique →ADUM5211ARSZ-RL7 Spécifications
| Isolation Voltage (rms) | 2500 Vrms |
| Number of Channels | 2 |
| Débit de données | 1 Mbps |
| Common-Mode Transient Immunity (CMTI) | 25 kV/µs (minimum) |
| Boîtier | 20-SSOP (0.209", 5.30 mm width) |
| Type de montage | Surface Mount |
| Technology | iCoupler (chip-scale transformer) |
| Integrated Isolated DC-DC | Yes (isoPower) |
| Isolated Output Voltage | Adjustable 3.135 V to 5.25 V |
| Plage de température de fonctionnement | -40 °C to +105 °C |
| Nombre de broches | 20 |
| Niveau MSL | 1 (Unlimited floor life) |
| Statut RoHS | ROHS3 Compliant |
| REACH Status | Unaffected (per partgenie data) |
| Packaging Form | Tape & Reel (RL7, 7-inch reel) |
Configuration des broches de ADUM5211ARSZ-RL7
| Broche 1 | VDD1 — Primary-side power supply, 3.0 V to 5.5 V |
| Broche 2 | GND1 — Primary-side ground reference |
| Broche 3 | VIA — Primary-side internal connection (tie to VDD1 per datasheet) |
| Broche 4 | NC — Not connected (per datasheet) |
| Broche 5 | NC — Not connected (per datasheet) |
| Broche 6 | NC — Not connected (per datasheet) |
| Broche 7 | NC — Not connected (per datasheet) |
| Broche 8 | NC — Not connected (per datasheet) |
| Broche 9 | NC — Not connected (per datasheet) |
| Broche 10 | NC — Not connected (per datasheet) |
| Broche 11 | GND2 — Secondary-side ground reference (isolated) |
| Broche 12 | VISO — Isolated power output (adjustable 3.135 V to 5.25 V) |
| Broche 13 | VSEL — Output voltage select (sets VISO regulation target) |
| Broche 14 | FB — Feedback input for VISO regulation loop |
| Broche 15 | VOA — Logic output channel A (secondary-side, isolated) |
| Broche 16 | VOB — Logic output channel B (secondary-side, isolated) |
| Broche 17 | VIA — Logic input channel A (primary-side) |
| Broche 18 | VIB — Logic input channel B (primary-side) |
| Broche 19 | NC — Not connected (per datasheet) |
| Broche 20 | NC — Not connected (per datasheet) |
Applications typiques
ADUM5211ARSZ-RL7 convient pour 6 applications: Isolated RS-485 Interface for Industrial PLCs, Isolated Gate-Driver Bias Supply for Solar Inverters, Isolated 4-20 mA Current Loop Transmitter, Isolated SPI Link for Digital Power Modules, Medical Patient-Monitoring Isolation, Isolated CAN Bus Interface for Automotive and EV Battery.
Isolated RS-485 Interface for Industrial PLCs
The ADUM5211ARSZ-RL7 provides both signal isolation and isolated 3.3V or 5V power for an RS-485 transceiver in industrial PLC and DCS modules. Its 2500 Vrms isolation meets IEC 61131-2 requirements for industrial control, and 25 kV/µs CMTI rejects fast transients from motor drives and switching contactors. Placed between the MCU UART lines and an ADM3485 or similar transceiver, it eliminates the discrete DC-DC + optocoupler stack. This integration saves roughly 80-120 mm² of PCB area and reduces component count by 6-8 parts, with load capability up to 100 mA on the secondary side.
Recommandé
Isolated Gate-Driver Bias Supply for Solar Inverters
In solar micro-inverters and string inverters, the ADUM5211ARSZ-RL7 isolates PWM control signals to the gate driver while supplying the 5V bias rail that powers the secondary side. With 25 kV/µs CMTI it tolerates the fast dV/dt of SiC MOSFET switching at 50-100 kHz without corrupting the PWM edges. The integrated DC-DC avoids the costly reinforced-isolation transformer module and the bulky safety capacitors required for 8 mm creepage. Engineers typically pair it with SiC gate drivers like the UCC21750, fed from the 100 mA isolated rail.
Recommandé
Isolated 4-20 mA Current Loop Transmitter
Process-control transmitters for pressure, flow, and temperature use the ADUM5211ARSZ-RL7 to isolate the HART or 4-20 mA loop from the host MCU while providing the isolated 3.3V or 5V supply for the loop-side ADC and DAC. Its 2500 Vrms isolation satisfies IEC 61010-1 for measurement equipment, and the 1 Mbps channel is sufficient for HART modulation at 1200/2200 Hz. The integrated DC-DC saves the cost and height of a 1W isolated module, freeing up DIN-rail space inside field-mounted transmitters.
Recommandé
Isolated SPI Link for Digital Power Modules
Digital point-of-load converters and digital POL modules use the ADUM5211ARSZ-RL7 to isolate the PMBus / SPI commands from the primary-side controller while delivering the isolated rail that powers the secondary-side PWM controller and DrMOS driver. Its 1 Mbps channel supports standard SPI at 1 MHz, and the 3.135-5.25V adjustable output covers both 3.3V logic and 5V analog supplies. Compared to discrete solutions, it cuts BOM cost by ~20% and PCB area by ~30% per isolated rail.
Recommandé
Medical Patient-Monitoring Isolation
Patient-monitoring devices such as ECG, pulse oximeter, and infusion pumps use the ADUM5211ARSZ-RL7 to provide 2500 Vrms patient-isolation between the analog front-end and the host processor, in accordance with IEC 60601-1 patient-auxiliary-current requirements. The integrated isolated DC-DC supplies the isolated side AFE (typically an AD8232 or ADS1291), eliminating discrete isolated modules that add leakage capacitance and degrade CMRR. Compact SSOP-20 packaging supports the small form factor required for wearable monitors.
Recommandé
Isolated CAN Bus Interface for Automotive and EV Battery
Battery-management systems (BMS) and traction inverter control units in EVs use the ADUM5211ARSZ-RL7 to isolate the CAN-FD bus between the master controller and individual battery slaves. With 25 kV/µs CMTI it tolerates the high dV/dt of SiC traction inverters, and the integrated DC-DC powers the isolated-side CAN transceiver and ADC. Drop-in compatibility with the ADUM5212 family allows easy migration to reinforced-isolation grades for higher-voltage battery packs.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ADUM5211ARSZ-RL7 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ADUM5210ARSZ-RL7 | ADUM5212ARSZ-RL7 | ADUM5211ARSZ | ADM3251EARWZ |
|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 20-SSOP (0.209") | 20-SSOP (0.209") - same | 20-SSOP (0.209") - same | 20-SSOP (0.209") - same | 20-SSOP (RW-20) - same |
| Number of Channels | 2 | 2 | 2 | 2 | 2 (RS-232 Tx/Rx) |
| Channel Direction | 2x Primary-to-Secondary | 2x Secondary-to-Primary | 2x Primary-to-Secondary | 2x Primary-to-Secondary | 1 Tx + 1 Rx (RS-232) |
| Data Rate | 1 Mbps | 1 Mbps | 1 Mbps | 1 Mbps | 460 kbps (RS-232) |
| Isolation Voltage (rms) | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms |
| CMTI (min) | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs |
| Integrated Isolated DC-DC | Yes (isoPower) | Yes (isoPower) | Yes (isoPower) | Yes (isoPower) | Yes (isolated RS-232 charge-pump) |
| Isolated Output Voltage | 3.135 V to 5.25 V | 3.135 V to 5.25 V | 3.135 V to 5.25 V | 3.135 V to 5.25 V | ±5 V to ±10 V (RS-232 levels) |
| Operating Temperature | -40 °C to +105 °C | -40 °C to +105 °C | -40 °C to +105 °C | -40 °C to +105 °C | -40 °C to +85 °C |
Principaux différenciateurs
- Integrated isolated DC-DC + 2-channel isolation in one IC (vs Discrete optocoupler + isolated module (e.g. 1W isolated DC-DC + 2x HCPL-1810))
- Channel direction matches primary-to-secondary signal flow (vs ADUM5210ARSZ-RL7)
- Reel-packaged variant (RL7) for high-volume SMT (vs ADUM5211ARSZ (tube packaging))
Notes de conception
Estimated: Each ADUM5211 channel pulls a small primary-side quiescent current (typical 8-15 mA total for both channels at 5 V VDD1). The integrated isoPower converter delivers up to 100 mA on the secondary side; avoid continuous loads above 80 mA to keep the internal transformer core from saturating. Place a 10 µF X7R ceramic bulk capacitor plus a 0.1 µF decoupling cap within 2 mm of VDD1 (pin 1) and VISO (pin 12) to suppress switching ripple from the internal DC-DC.
Maintain at least 8 mm of creepage between primary-side and secondary-side copper on the top and bottom layers to preserve the 2500 Vrms rating. Do not run any primary-side traces or vias underneath the SSOP body. Place a slot in the PCB (cutout) under the package if your application requires reinforced isolation above 2.5 kVrms, or use the ADuM5212/ADuM6200 family which offers 5 kVrms options. Connect the SSOP thermal pad (if present) to the secondary-side ground only.
The 25 kV/µs CMTI rating assumes correct PCB layout - a high dV/dt transient coupled across the barrier through stray capacitance can still cause data corruption if the isolation gap is bridged by ground pours. Add a 1 MΩ pull-up on each logic output (VOA, VOB) and a 1 MΩ pull-down on each input (VIA, VIB) to keep the channels at a defined state during power-up of the isolated supply. Reference: ADI ADuM5210/5211/5212 datasheet, Application Information section.
Do not confuse ADUM5211ARSZ-RL7 (both channels primary-to-secondary) with ADUM5210ARSZ-RL7 (both channels secondary-to-primary) or ADUM5212 (different enable pin). Do not exceed the 100 mA VISO load limit - the internal DC-DC is sized for low-power isolation, not for powering entire subsystems. Do not bypass the VSEL/FB feedback divider; the output voltage defaults to ~3.3 V if left floating. Finally, do not connect GND1 and GND2 together - that defeats the isolation barrier and can cause ground-loop noise.
Informations de conformité
ROHS3 Compliant per partgenie data; REACH Unaffected per partgenie data; MSL 1 (Unlimited floor life). AEC-Q100 not applicable for industrial-grade standard part - automotive variant exists separately per ADI product family. Halogen-free and conflict-minerals status not stated in verified data - marked unknown.
