Analog Devices Inc. ADUM6401CRIZ

Overview

ADUM6401CRIZ from Analog Devices is a quad-channel digital isolator with integrated isoPower® DC-to-DC converter, delivering 3.3 V isolated output at up to 100 mA (330 mW) from a 5 V input, featuring 5 kV rms isolation, 25 Mbps data rate per channel, and Schmitt-triggered inputs for noise immunity. It serves as a self-contained isolation and power solution in RS-485 transceivers and medical sensor interfaces.

For engineers reviewing the ADUM6401CRIZ datasheet, ADUM6401CRIZ pinout, ADUM6401CRIZ application, or ADUM6401CRIZ equivalent, this device enables compact, low-noise, high-CMTI (>25 kV/μs) isolated signal and power transfer without external transformers or regulators - critical for IEC 60601-1 compliant medical systems and industrial bus interfaces.

Technical Context

The ADUM6401CRIZ integrates four independent iCoupler® isolation channels with an on-chip transformer-based isoPower DC-DC converter operating at 625 kHz PWM frequency and 180 MHz oscillator frequency. Its input-side logic operates at 5 V (VDD1), while the isolated side delivers regulated 3.3 V (VISO) with load regulation ≤5% across 10–90 mA.

It uses Schmitt-triggered inputs for robust noise rejection and supports codirectional channel matching (tPSKCD ≤6 ns) and high common-mode transient immunity (>25 kV/μs). The device implements undervoltage lockout (VUV+ = 2.7 V) and thermal shutdown (TSSD = 150°C) for system-level reliability.

Key Specifications

Pinout & Package

ADUM6401CRIZ is housed in a 16-lead SOIC wide-body package (RW-16), measuring 10.3 mm × 10.3 mm × 2.4 mm, with gull-wing leads and creepage-optimized internal layout for reinforced isolation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM6401ARIZ, the ADUM6401CRIZ delivers 25× higher data rate and tighter timing control; versus SI88640ED-IS, it offers programmable 3.3 V output and superior CMTI, making it preferred for high-noise, high-speed, low-voltage isolated interfaces.

Availability

ADUM6401CRIZ is available at Aetrix Electronics and suitable for industrial motor control, medical patient monitoring, PLC I/O modules, and isolated RS-485 communication nodes requiring stable component supply, long-term lifecycle assurance, and certified reinforced isolation.

Supply support for ADUM6401CRIZ 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, with over 50 years of innovation in precision signal chain and power management solutions.

The ADuM640x family was designed specifically to integrate signal isolation and isolated DC-DC power in a single SOIC package for space-constrained, safety-certified applications in medical, industrial, and communications equipment.

FAQ

What is the maximum isolated output power of the ADUM6401CRIZ?

The ADUM6401CRIZ delivers up to 330 mW of isolated power at 3.3 V output when supplied with 5 V on VDD1, supporting up to 100 mA load current. This is confirmed in Table 1 and Table 10 of the Rev. B datasheet under 5 V input / 3.3 V output conditions. The ADUM6401CRIZ achieves this with 30% efficiency at full load, enabling direct powering of isolated transceivers or ADCs without external DC-DC stages.

Does the ADUM6401CRIZ support 3.3 V input operation?

No, the ADUM6401CRIZ is configured for 5 V primary input (VDD1) and 3.3 V isolated output (VISO). Its VSEL pin must be tied to GNDISO to select 3.3 V output mode, and VDD1 must be 4.5–5.5 V per Table 18. For 3.3 V input operation, Analog Devices specifies the ADUM6401BRIZ variant - the ADUM6401CRIZ is not rated for 3.3 V VDD1 operation.

How does the ADUM6401CRIZ achieve safety certification for medical use?

The ADUM6401CRIZ carries VDE certification to DIN V VDE V 0884-10 (reinforced insulation), UL recognition per UL 1577 (5000 V rms), and IEC 60601-1 compliance (250 V rms working voltage). Its RW-16 package provides 7.6 mm creepage and 8.0 mm clearance, and it is tested to 1590 V peak partial discharge limit - all verified in Tables 15–17 of the datasheet for ADUM6401CRIZ.

Can the ADUM6401CRIZ replace optocouplers in existing designs?

Yes, the ADUM6401CRIZ can replace discrete optocoupler + isolated DC-DC combinations in many applications. Its 25 Mbps speed exceeds typical optocouplers (≤10 Mbps), and its integrated 330 mW 3.3 V supply eliminates external isolated power components. However, pinout and enable logic differ - redesign of PCB layout and firmware initialization sequence is required for drop-in replacement.

What decoupling capacitors are required for the ADUM6401CRIZ VISO rail?

The ADUM6401CRIZ requires a minimum 0.1 μF ceramic capacitor in parallel with a 10 μF bulk capacitor (e.g., tantalum or aluminum polymer) on the VISO pin, as specified in Table 2 and the Applications Information section. This dual-capacitor network suppresses high-frequency ripple (75 mV p-p max) and low-frequency noise (200 mV p-p max) measured at 72 mA load, ensuring stable operation of downstream isolated circuitry.