Analog Devices Inc. AD8411AWBRZ

Overview

AD8411AWBRZ from Analog Devices is a high-voltage, bidirectional current-sense amplifier with 50 V/V fixed gain, 2.7 MHz small-signal bandwidth, −2 V to +70 V continuous common-mode input range, ±200 µV max input offset over temperature, and AEC-Q100 qualification for automotive solenoid and BLDC motor control.

For engineers reviewing the AD8411AWBRZ datasheet, AD8411AWBRZ pinout, AD8411AWBRZ application, or AD8411AWBRZ equivalent, this page delivers verified specifications, SOIC_N package details, PWM rejection capability, DC-DC converter rail monitoring use cases, and validated alternative options for high-side current sensing in harsh thermal environments.

Technical Context

The AD8411AWBRZ 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 artifacts in PWM-rich environments. Its deglitch circuitry holds output for ~1 µs during fast common-mode transients (e.g., 1 V/ns), preserving measurement fidelity 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 interfacing with ADCs or comparators in 2.9 V to 5.5 V supply systems.

Key Specifications

Pinout & Package

AD8411AWBRZ is housed in an 8-lead SOIC_N (R-8) package with exposed pad for thermal performance. Pin 4 is NC (internally connected to die; may float or tie to GND). No thermal pad connection required per JEDEC JESD-51 simulation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA240A1QDRQ1 and MAX40056ATA+T, the AD8411AWBRZ uniquely combines AEC-Q100 qualification, 2.7 MHz bandwidth, and integrated deglitching-making it the only choice for high-fidelity current sensing in automotive-grade BLDC inverters operating above 500 kHz PWM frequencies.

Availability

AD8411AWBRZ is available at Aetrix Electronics and suitable for BLDC motor control, solenoid driver monitoring, and 48 V–12 V bidirectional DC-DC converter designs requiring stable component supply across automotive, industrial, and datacenter power applications.

Supply support for AD8411AWBRZ 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 specifically for accurate, robust current measurement in automotive electrification, industrial motor drives, and high-efficiency power conversion systems.

FAQ

What is the maximum continuous common-mode input voltage for the AD8411AWBRZ?

The AD8411AWBRZ supports −2 V to +70 V continuous common-mode input voltage. It also survives −20 V to +85 V common-mode transients without damage. This wide range enables reliable high-side current sensing on 48 V automotive rails and industrial 60 V systems while maintaining specified accuracy and stability throughout the operating temperature range of −40°C to +125°C.

Does the AD8411AWBRZ require external components for offset adjustment?

No, the AD8411AWBRZ does not require external components for offset adjustment. Its VREF₁ and VREF₂ pins connect internally through 60 kΩ resistors to enable ratiometric output offset tuning. When tied together and referenced to supply or ground, they allow precise zero-point setting for unidirectional or bidirectional operation-eliminating need for external DACs, potentiometers, or trimming resistors in the AD8411AWBRZ design.

Is the AD8411AWBRZ pin-compatible with other members of the AD8411A family?

Yes, the AD8411AWBRZ (8-lead SOIC_N) shares identical pinout with the AD8411AWRZ (8-lead MSOP) variant. Both use the same 8-pin configuration: −IN, GND, VREF2, NC, OUT, VS, VREF1, +IN. However, it is not pin-compatible with the 10-lead MSOP version (AD8411ARZ), which adds two NC pins for FMEA isolation and requires PCB layout revision when substituting the AD8411AWBRZ.

How does the AD8411AWBRZ handle PWM interference in motor control applications?

The AD8411AWBRZ incorporates dedicated deglitch circuitry that holds its output stable for approximately 1 µs during fast common-mode transients-such as those generated by MOSFET switching in BLDC inverters. This prevents erroneous current readings during PWM edges, ensuring accurate measurement of true differential shunt voltage after settling. The architecture achieves this without chopping or auto-zero clocks, preserving full 2.7 MHz bandwidth and avoiding intermodulation distortion in the AD8411AWBRZ signal path.

What is the guaranteed gain error specification for the AD8411AWBRZ over temperature?

The AD8411AWBRZ has a guaranteed initial gain error of ±0.15% over its full operating temperature range of −40°C to +125°C. This specification applies to the 50 V/V nominal gain and is measured under standard conditions (VS = 5 V, VCM = 12 V). The device also exhibits ±6 ppm/°C gain drift, contributing less than 0.08% additional error across the temperature span-ensuring consistent scaling accuracy in thermally demanding AD8411AWBRZ deployments.