Analog Devices Inc. ADUM6212ARSZ

Overview

ADuM6212ARSZ from Analog Devices is a dual-channel digital isolator with integrated isoPower® DC-to-DC converter, providing galvanic isolation and regulated 3.3 V or 5.0 V isolated supply up to 150 mW. It delivers 100 Mbps signal isolation (NRZ), 25 kV/µs common-mode transient immunity, and operates across −40°C to +105°C in a 20-lead SSOP package with 5.3 mm creepage. It is used in isolated sensor interfaces and industrial PLCs where compact, self-powered isolation is required.

For engineers reviewing the ADuM6212ARSZ datasheet, ADuM6212ARSZ pinout, ADuM6212ARSZ application, or ADuM6212ARSZ equivalent, key selection criteria include its dual-output-direction configuration (VOA/VOB on Side 2), VSEL-programmable isolated output voltage, thermal shutdown at 154°C, and compliance with UL, CSA, and VDE reinforced insulation standards for safety-critical designs.

Technical Context

The ADuM6212ARSZ implements iCoupler® chip-scale transformer technology for both data channel isolation and magnetic power transfer, eliminating external isolated DC-DC converters. Its isoPower® converter operates at 125 MHz switching frequency and 600 kHz PWM, supporting input voltages from 3.135 V to 5.5 V and delivering either 3.3 V (±3.5%) or 5.0 V (±3.25%) regulated output.

Unlike ADuM6210 (VIA/VIB inputs, VOA/VOB outputs) and ADuM6211 (mixed I/O), the ADuM6212ARSZ has both outputs on Side 2 (VOA and VOB), with inputs VIA and VIB located on Side 1 - enabling unidirectional signal flow from primary to secondary side only. Its propagation delay skew is ≤12 ns (C grade) and pulse width distortion ≤2.5 ns, ensuring tight timing alignment for high-speed control loops.

Key Specifications

Pinout & Package

ADuM6212ARSZ uses a 20-lead SSOP package (7.2 mm × 5.3 mm, 0.65 mm pitch) with 5.3 mm creepage between input and output sides. Pin 1 is marked with a dot; GNDP (pins 2,5,6,10) and GNDISO (pins 11,15,16,19) must be connected to respective ground planes. NC pins (7,14) should be grounded to minimize noise coupling.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel isolated power applications.

Compared with ADuM6211ARSZ, ADuM6212ARSZ offers dedicated output-only topology for simplified master-side control, while Si88222ED-IS trades integrated power for higher bandwidth - making ADuM6212ARSZ the optimal choice for compact, self-powered industrial I/O where unidirectional signal flow dominates.

Availability

ADuM6212ARSZ is available at Aetrix Electronics and suitable for industrial PLCs, isolated sensor interfaces, motor drive gate driver biasing, and RS-232 transceiver isolation requiring stable component supply and long-term lifecycle support.

Supply support for ADuM6212ARSZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, industrial, and communications markets.

The ADuM6212ARSZ belongs to the iCoupler® isoPower® family, designed specifically to replace optocouplers and discrete isolated power supplies in space-constrained, high-reliability industrial and medical systems.

FAQ

What is the maximum output current supported by the ADuM6212ARSZ's isolated DC-DC converter?

The ADuM6212ARSZ provides up to 30 mA output current at its VISO pin when configured for 5.0 V output and supplied with 5 V at VDDP. At 3.3 V VISO output, maximum current is 20 mA. These limits ensure stable regulation under full load while maintaining thermal safety within the 105°C operating range. The ADuM6212ARSZ datasheet specifies these values in Tables 3 and 7 under "Output Supply IISO (MAX)".

Can the ADuM6212ARSZ operate with different input and output supply voltages, such as 5 V on VDDP and 3.3 V on VISO?

Yes, the ADuM6212ARSZ supports cross-voltage operation: it can accept 5 V at VDDP while delivering a regulated 3.3 V at VISO, as confirmed in Table 11 of the datasheet. This configuration yields up to 30 mA at 3.3 V with 20–35% efficiency. The VSEL pin must be configured with R1 = 10 kΩ and R2 = 16.9 kΩ to set the 3.3 V output, and VDD2 may be independently powered from VISO or an external source.

How does the PDIS pin function in the ADuM6212ARSZ, and what is its default state?

The PDIS pin on the ADuM6212ARSZ is an active-high power disable control. When pulled high (≥2.0 V), it places the isoPower® DC-DC converter into low-power standby mode, reducing IDDP(Q) to ~3.2 mA. When held low (<0.8 V), the converter operates normally. The pin has no internal pull-up/down, so external biasing is required for deterministic behavior. Default operation assumes PDIS tied to GNDP unless power gating is explicitly needed.

What safety certifications apply to the ADuM6212ARSZ, and what do they cover?

The ADuM6212ARSZ carries UL 1577 recognition (3750 V rms, 1 min), CSA Component Acceptance Notice 5A, and VDE V 0884-10 certification (VIORM = 849 V peak, reinforced insulation). These cover dielectric withstand, partial discharge, creepage/clearance (5.3 mm), and lifetime insulation performance under continuous 560 V peak working voltage. All certifications are production-tested per device, not sample-based.

Does the ADuM6212ARSZ require external components for basic operation, and which ones are mandatory?

Yes, the ADuM6212ARSZ requires mandatory external components: a VSEL resistor network (R1 = 10 kΩ, R2 = 16.9 kΩ for 3.3 V or 30.9 kΩ for 5.0 V) between VISO and GNDISO, and 0.1 µF || 10 µF capacitors (CBO) at VISO for ripple suppression. Input/output decoupling (0.1 µF ceramic) near VDD1/VDD2 is strongly recommended. No external transformers or inductors are needed - the isoPower® converter is fully integrated.