Analog Devices Inc. ADUM6400CRWZ

Overview

ADUM6400CRWZ from Analog Devices is a quad-channel digital isolator with integrated isoPower® DC-to-DC converter, delivering up to 400 mW isolated output power at 5 V, supporting 25 Mbps data rate per channel, and rated for 5 kV rms isolation (1 min). It operates across −40°C to +105°C and features Schmitt-triggered inputs for noise immunity in industrial RS-485 transceiver interfaces.

For engineers reviewing the ADUM6400CRWZ datasheet, ADUM6400CRWZ pinout, ADUM6400CRWZ application, or ADUM6400CRWZ equivalent, this device serves as a single-chip solution eliminating external isolated DC/DC converters in space-constrained medical sensor interfaces, AC/DC auxiliary bias supplies, and isolated I/O modules requiring robust common-mode transient immunity (>25 kV/μs) and regulatory-compliant reinforced insulation.

Technical Context

The ADUM6400CRWZ integrates four unidirectional iCoupler® isolation channels with an on-chip high-frequency transformer-based isoPower DC-DC converter operating at 625 kHz PWM frequency and 180 MHz oscillator frequency. Its input-side logic interface (VDD1/GND1) and isolated output side (VISO/GNDISO) are galvanically separated, with VSEL pin selecting 3.3 V or 5 V isolated output regulation.

It implements undervoltage lockout (UVLO) on all three supply rails (VDD1, VDDL, VISO), supports CMOS-level signaling with 2.5 ns rise/fall times, and maintains signal integrity via propagation delay matching ≤6 ns (codirectional) and pulse width distortion ≤6 ns - critical for synchronous serial interfaces like SPI and isolated ADC control.

Key Specifications

Pinout & Package

ADUM6400CRWZ uses a 16-lead SOIC wide-body package (RW-16) with creepage ≥7.6 mm and clearance ≥8.0 mm, certified for reinforced insulation per DIN V VDE V 0884-10.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM6400CRWZ, ADUM6401CRWZ offers identical isolation, power, and speed but differs in channel assignment - making it a functional alternative for layout adaptation; SI88642EC-IS provides comparable isolation rating but trades 5 V output flexibility and higher power for lower cost and different regulatory coverage.

Availability

ADUM6400CRWZ is available at Aetrix Electronics and suitable for industrial motor drives, medical patient monitoring systems, AC/DC auxiliary bias supplies, and isolated industrial I/O modules requiring stable component supply, long-term lifecycle support, and full regulatory compliance documentation.

Supply support for ADUM6400CRWZ 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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.

The ADUM6400CRWZ belongs to the iCoupler® isoPower® family, designed specifically to integrate signal isolation and isolated power in a single package for compact, certified, and low-emission industrial and medical isolation systems.

FAQ

What is the maximum isolated output current supported by ADUM6400CRWZ?

The ADUM6400CRWZ delivers up to 80 mA of regulated 5 V output current (IISO(MAX) = 80 mA) when powered from a 5 V input supply. This corresponds to 400 mW of isolated power, sufficient to drive RS-485 transceivers, isolated ADCs, or small microcontrollers on the secondary side. The actual available current depends on input voltage, ambient temperature, and PCB thermal design - derating applies above 85°C ambient.

Does ADUM6400CRWZ require external components for its integrated DC-DC converter?

Yes, ADUM6400CRWZ requires two external bypass capacitors: a 0.1 μF ceramic capacitor and a 10 μF bulk capacitor (CBO) placed close to pins VISO and GNDISO. These stabilize the regulated output and suppress ripple/noise. No inductors, transformers, or feedback resistors are needed - the converter is fully integrated and internally regulated. Layout guidelines in AN-0971 must be followed to meet emissions standards.

Can ADUM6400CRWZ operate with a 3.3 V input supply?

Yes, ADUM6400CRWZ supports 3.3 V primary input operation, delivering a regulated 3.3 V isolated output at up to 40 mA (132 mW). In this mode, VSEL must be tied to GNDISO. Input voltage range is 3.0–3.6 V, and specifications including data rate (25 Mbps), CMTI (>25 kV/μs), and temperature range (−40°C to +105°C) remain fully valid. Efficiency drops to 33% at full load compared to 34% at 5 V input.

What safety certifications apply to ADUM6400CRWZ in the RW-16 package?

ADUM6400CRWZ in the RW-16 package is UL recognized (5000 V rms, 1 min per UL 1577), certified to IEC 60950-1 (400 V rms working voltage), and carries VDE approval per DIN V VDE V 0884-10 (reinforced insulation, VIORM = 846 V peak). It also meets CSA Component Acceptance Notice 5A (pending) and CQC GB4943.1-2011. Full certification details are in Table 15 of the datasheet.

How does the VSEL pin configure the isolated output voltage of ADUM6400CRWZ?

The VSEL pin selects the isolated output voltage: connect VSEL to VISO for 5.0 V output regulation, or tie VSEL to GNDISO for 3.3 V output regulation. This selection determines both the target setpoint (4.7–5.4 V or 3.0–3.6 V) and maximum load capability (80 mA or 40 mA). VSEL must be hard-wired - it is not dynamically switchable during operation and has no internal pull-up/down.