Analog Devices Inc. ADUM6412BRSZ

Overview

ADUM6412BRSZ from Analog Devices is a quad-channel digital isolator with integrated isoPower® DC-to-DC converter, providing 3.3 V isolated output at up to 20 mA (66 mW) and 150 Mbps signal isolation per channel. It features 24-lead SSOP package with 5.3 mm creepage, 100 kV/µs common-mode transient immunity, and reinforced insulation rated to 3750 V_rms for 1 minute.

For engineers reviewing the ADUM6412BRSZ datasheet, ADUM6412BRSZ pinout, ADUM6412BRSZ application, or ADUM6412BRSZ equivalent, this device is selected for compact isolated power + signal transfer in industrial PLCs, RS-232 transceivers, and isolated sensor interfaces where board space and safety certification are critical.

Technical Context

The ADUM6412BRSZ uses iCoupler® chip-scale transformer technology for both data isolation and magnetic DC-DC conversion, eliminating external isolated power supplies. Its four independent channels support asymmetric I/O directionality: Channels 1A–1B input-side, 1C–1D output-side on primary side (VDD1), and 2A–2B output-side, 2C–2D input-side on isolated side (VISO).

It operates across −40°C to +105°C with UVLO thresholds at 1.5 V/1.6 V, supports 1.8 V to 5 V logic on both sides, and delivers regulated isolated supply via external resistor network (R1 = 10 kΩ, R2 = 16.9 kΩ for 3.3 V_ISO). Propagation delay skew is ≤7.5 ns between any two channels.

Key Specifications

Pinout & Package

ADUM6412BRSZ uses a 24-lead SSOP (Shrink Small Outline Package) with exposed pad, 0.635 mm pitch, and 5.3 mm minimum creepage distance between primary and secondary sides.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM6411BRSZ and SI88642BC-ISR, ADUM6412BRSZ uniquely balances 3.3 V isolated supply accuracy (±3% setpoint), VDE 0884-17 certification, and asymmetric I/O mapping-making it the only option qualified for IEC 60601-1 medical isolation and optimized for control-signal-forward architectures.

Availability

ADUM6412BRSZ is available at Aetrix Electronics and suitable for industrial PLCs, isolated RS-232 transceivers, and motor drive gate driver bias supplies requiring stable component supply, full regulatory documentation, and long-term lifecycle support.

Supply support for ADUM6412BRSZ 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 company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, industrial automation, and communications.

The ADuM641x family was designed to replace discrete isolation + DC-DC solutions in space-constrained, safety-certified systems-delivering integrated signal and power isolation in a single SSOP package with industry-leading CMTI and regulatory compliance.

FAQ

What is the maximum isolated output current of the ADUM6412BRSZ?

The ADUM6412BRSZ delivers up to 20 mA at 3.3 V (66 mW) on the isolated side when configured for 3.3 V output using R1 = 10 kΩ and R2 = 16.9 kΩ. This is verified per Table 7 in the Rev. B datasheet under 3.3 V primary/3.3 V secondary conditions. Exceeding 20 mA risks dropout or thermal shutdown; ADUM6412BRSZ must not be loaded beyond this limit for reliable operation.

Does the ADUM6412BRSZ support 1.8 V logic levels on both sides?

Yes, the ADUM6412BRSZ supports 1.8 V operation on both VDD1 and VDD2 sides, as confirmed in Table 18–20 of the datasheet. Input thresholds scale to 0.3×/0.7× supply, and VOH/VOL meet 1.8 V CMOS specifications. However, the isolated DC-DC converter requires ≥3.0 V input and cannot generate 1.8 V output - VISO must be set to 3.3 V or 5 V.

How is the isolated supply voltage set on the ADUM6412BRSZ?

The ADUM6412BRSZ uses an external resistor divider on the VSEL pin to set VISO: R1 (10 kΩ) from VISO to VSEL, and R2 (16.9 kΩ) from VSEL to GNDISO yields 3.3 V. This configuration is specified in Tables 7 and 11. Incorrect resistor values cause UVLO activation or inaccurate regulation - ADUM6412BRSZ will not operate if VSEL is left floating or shorted.

What safety certifications does the ADUM6412BRSZ hold?

The ADUM6412BRSZ is certified to UL 1577 (3750 V_rms/1 min), IEC/CSA 62368-1, IEC/CSA 60601-1 (1 MOPP), IEC/CSA 61010-1, and DIN EN IEC 60747-17 (VDE 0884-17) for reinforced insulation. These are listed in Table 22 of the datasheet. No additional agency filings are required for end-equipment compliance when used within rated parameters.

Can the ADUM6412BRSZ replace the ADUM6410BRSZ in an existing design?

No - the ADUM6412BRSZ has different I/O direction mapping than ADUM6410BRSZ (Table 2). ADUM6410BRSZ is 4-input on primary/4-output on isolated side, while ADUM6412BRSZ is 2-in/2-out on primary and 2-out/2-in on isolated side. Swapping them requires PCB layout and firmware changes to match pin functions; ADUM6412BRSZ is not a drop-in replacement for ADUM6410BRSZ.