Analog Devices Inc. ADUM140E1BRZ-RL7

Overview

ADUM140E1BRZ-RL7 from Analog Devices is a quad-channel digital isolator based on iCoupler® transformer technology, providing 3.0 kV_RMS galvanic isolation between input and output sides. It supports 150 Mbps data rate, 13 ns max propagation delay at 5 V, and operates across 1.8 V to 5 V supply rails with level translation capability. It is used in SPI isolation for industrial PLCs where high CMTI (>100 kV/µs) and fail-safe high output state are required.

For engineers reviewing the ADUM140E1BRZ-RL7 datasheet, ADUM140E1BRZ-RL7 pinout, ADUM140E1BRZ-RL7 application, or ADUM140E1BRZ-RL7 equivalent, this page delivers verified specifications including isolation voltage rating, propagation delay skew, CMTI performance, fail-safe behavior, and SOIC_N package compatibility - all critical for safety-critical signal isolation in motor drives and medical equipment.

Technical Context

The ADUM140E1BRZ-RL7 implements four independent unidirectional CMOS-isolated channels using monolithic air-core transformers, enabling dc-correct operation without input transitions. Its architecture ensures tight channel matching (≤3.0 ns codirectional skew) and low jitter (70 ps rms at 5 V), supporting high-speed serial protocols without re-timing.

It features dual-supply operation (VDD1/VDD2 = 1.8–5 V), integrated undervoltage lockout (UVLO at 1.5 V/1.6 V), and configurable fail-safe output (high-state default when disabled). The device complies with DIN EN IEC 60747-17 (VDE 0884-17) for reinforced insulation and meets UL 1577, IEC 60950-1, IEC 60601-1, and IEC 61010-1 standards.

Key Specifications

Pinout & Package

ADUM140E1BRZ-RL7 is housed in a 16-lead RoHS-compliant narrow-body SOIC (R-16 / SOIC_N) package with creepage/clearance ≥4.0 mm, optimized for space-constrained PCB layouts requiring 3.0 kV_RMS isolation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad digital isolator applications.

Compared with ADUM140E1BRZ-RL7, ADUM140D1BRZ-RL7 offers identical timing and power specs but inverted fail-safe polarity, while SI8641ED-B-IS provides higher isolation voltage in a wider SOIC package - making the former a functional alternative for logic-polarity-sensitive designs and the latter suitable for higher-voltage safety margins.

Availability

ADUM140E1BRZ-RL7 is available at Aetrix Electronics and suitable for industrial motor drives, medical imaging power supplies, automotive battery management systems, and SPI-isolated data acquisition requiring stable component supply and long-term lifecycle support.

Supply support for ADUM140E1BRZ-RL7 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, power, and connectivity applications.

The ADuM140x series belongs to Analog Devices' iCoupler® digital isolator product line, designed specifically for replacing optocouplers in high-reliability, high-speed, and safety-certified isolation applications across industrial, medical, and automotive markets.

FAQ

What is the maximum guaranteed data rate for ADUM140E1BRZ-RL7?

The ADUM140E1BRZ-RL7 guarantees a maximum data rate of 150 Mbps across its full operating temperature range (−40°C to +125°C) and supply voltage range (1.8 V to 5 V). This value is validated per the datasheet's switching specifications table and applies to all four channels simultaneously under CL = 15 pF loading conditions. Higher rates may be achievable but are not production-guaranteed.

Does ADUM140E1BRZ-RL7 support level translation between different supply voltages?

Yes, ADUM140E1BRZ-RL7 supports bidirectional level translation: VDD1 (input side) and VDD2 (output side) can each operate independently from 1.8 V to 5 V. For example, it can translate 1.8 V logic from an FPGA on VDD1 to 3.3 V logic for an ADC on VDD2, with input thresholds scaling to 0.7×VDDx and outputs meeting VOH/VOL specs at the respective rail.

What is the fail-safe behavior of ADUM140E1BRZ-RL7 when power is removed?

ADUM140E1BRZ-RL7 is configured as an "E1" variant, meaning its outputs default to logic high when either VDD1 or VDD2 is absent or when enable inputs are deasserted. This fail-safe high state is implemented via internal circuitry and does not require external pull-ups, ensuring predictable behavior during brownout or power sequencing events in safety-critical systems.

Is ADUM140E1BRZ-RL7 certified for medical applications?

Yes, ADUM140E1BRZ-RL7 is certified to IEC/EN/CSA 60601-1 for medical electrical equipment and meets DIN EN IEC 60747-17 (VDE 0884-17) for reinforced insulation. Its 3000 V_RMS rating, CTI >400 V, and Material Group II packaging satisfy creepage and clearance requirements for patient-connected devices operating at pollution degree 2 and altitudes ≤2000 m.

How does the common-mode transient immunity (CMTI) of ADUM140E1BRZ-RL7 compare to optocouplers?

ADUM140E1BRZ-RL7 delivers ≥100 kV/µs CMTI - over 10× higher than typical optocouplers (5–10 kV/µs). This is achieved via transformer-based coupling and differential receiver design, enabling robust operation in high-dV/dt environments such as IGBT/SiC gate driver circuits where fast transients would corrupt optocoupler output signals.