Analog Devices Inc. AD8411AWBRMZ-RL

Overview

AD8411AWBRMZ-RL from Analog Devices is a high-voltage, bidirectional current-sense amplifier with 50 V/V fixed gain, −2 V to +70 V continuous common-mode input range, 2.7 MHz small-signal bandwidth, and ±200 µV max input offset over temperature. It delivers precision sensing in BLDC motor control, 48 V/12 V DC-DC converters, and solenoid drivers where PWM rejection and low drift are critical.

For engineers reviewing the AD8411AWBRMZ-RL datasheet, AD8411AWBRMZ-RL pinout, AD8411AWBRMZ-RL application, or AD8411AWBRMZ-RL equivalent, this page provides verified specifications, package mapping to 8-lead MSOP, real-world use scenarios, and two validated alternative parts for automotive and industrial power systems.

Technical Context

The AD8411AWBRMZ-RL employs a DigiTrim™ in-package trim core architecture that achieves ±0.26 µV/°C typical offset drift without chopping or auto-zero clocks-eliminating intermodulation risk in PWM-rich environments. Its deglitch circuitry holds output for ~1 µs during fast common-mode transients (e.g., 1 V/ns), preserving accuracy during switching events.

It features balanced input bias currents across −20 V to +85 V survival range, ratiometric VREF₁/VREF₂ offset adjustment via internal 60 kΩ dividers, and buffered output directly compatible with ADC inputs or comparator thresholds. CMRR remains ≥123 dB DC and ≥96 dB at 50 kHz under full operating conditions.

Key Specifications

Pinout & Package

AD8411AWBRMZ-RL is housed in an 8-lead MSOP package (RM-8) with exposed pad for thermal performance (θ_JA = 152°C/W). Pin 4 is NC (internally connected to die; may float or tie to GND); all other pins match functional roles defined in Analog Devices' official pinout.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar current-sense amplifier applications.

Compared with AD8411AWBRMZ-RL, INA240A1QDRQ1 offers higher voltage survival but lower bandwidth and no ratiometric offset tuning, while MAX40056ATA+T matches gain and bandwidth closely but lacks VREF flexibility and automotive temperature range-making AD8411AWBRMZ-RL optimal for demanding bidirectional, PWM-heavy, and thermally variable applications.

Availability

AD8411AWBRMZ-RL is available at Aetrix Electronics and suitable for BLDC motor control, 48 V/12 V DC-DC converters, and solenoid driver systems requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.

Supply support for AD8411AWBRMZ-RL 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 Wilmington, MA.

The AD8411A product line delivers high-voltage, high-bandwidth current-sense amplifiers engineered for precision motor control, automotive electrification, and high-efficiency power conversion where PWM rejection and thermal stability are non-negotiable.

FAQ

What is the operating temperature range for AD8411AWBRMZ-RL?

The AD8411AWBRMZ-RL is rated for −40°C to +125°C operation, matching the AD8411AWB grade specified in the datasheet. This range is validated for full electrical performance including gain error ≤0.15%, offset ≤±200 µV, and CMRR ≥123 dB. It meets AEC-Q100 Grade 1 requirements and is suitable for under-hood automotive and industrial environments where ambient temperatures exceed 105°C.

Does AD8411AWBRMZ-RL support bidirectional current sensing?

Yes, AD8411AWBRMZ-RL supports true bidirectional current sensing via its differential input architecture and ratiometric VREF₁/VREF₂ offset adjustment. When configured with symmetric reference voltages, the output centers at mid-supply for zero current and swings above/below based on shunt polarity-enabling regenerative current detection in motor drives and bidirectional DC-DC converters without external level-shifting circuitry.

What package type is used for AD8411AWBRMZ-RL?

AD8411AWBRMZ-RL uses the 8-lead MSOP package (RM-8), as confirmed by the "WBRMZ" suffix in the part number and Analog Devices' ordering guide. This package features an exposed thermal pad, θ_JA = 152°C/W, and pin-compatible layout with industry-standard MSOP footprints-facilitating drop-in replacement in space-constrained power designs.

How does AD8411AWBRMZ-RL handle PWM common-mode interference?

AD8411AWBRMZ-RL incorporates dedicated deglitch circuitry that holds its output constant for ~1 µs during fast common-mode transients (e.g., 0 V → 48 V at 1 V/ns), then settles to the correct value based on shunt differential voltage. This prevents false triggering in overcurrent protection circuits and maintains measurement fidelity in BLDC inverters and synchronous rectifiers where PWM edges dominate the input waveform.

Can AD8411AWBRMZ-RL operate from a 3.3 V supply?

Yes, AD8411AWBRMZ-RL operates from 2.9 V to 5.5 V, fully supporting 3.3 V nominal supplies. At 3.3 V, it maintains 2.7 MHz bandwidth, ±200 µV max offset, and ≥123 dB DC CMRR. Output swing is specified to within 5 mV of GND and 16 mV of VS, enabling direct interface with 3.3 V ADCs-verified in datasheet Table 1 under VS = 3.3 V conditions.