Analog Devices Inc. AD8209AWBRMZ-R7

Overview

AD8209AWBRMZ-R7 from Analog Devices is a high-voltage, AEC-Q100-qualified precision difference amplifier optimized for high-side current sensing in automotive and industrial power systems. It delivers 14 V/V system gain, ±1 mV typical input offset voltage, 80 dB minimum CMRR (dc to 10 kHz), and operates from −2 V to +50 V common-mode input range with a single 5 V supply-enabling accurate shunt-based current monitoring in motor controls and solenoid drivers.

For engineers reviewing the AD8209AWBRMZ-R7 datasheet, AD8209AWBRMZ-R7 pinout, AD8209AWBRMZ-R7 application, or AD8209AWBRMZ-R7 equivalent, this device supports robust high-common-mode-voltage signal conditioning with integrated EMI filtering, buffered output, and externally configurable low-pass filtering-critical for diagnostic protection and PWM-controlled inductive load monitoring.

Technical Context

The AD8209AWBRMZ-R7 implements a two-stage architecture: a preamplifier (A1) with 7 V/V gain and 100 kΩ series output resistor, followed by a buffer (A2) with 2 V/V gain. Its laser-trimmed resistor network achieves <0.01% ratio matching, enabling 80 dB CMRR across dc–10 kHz despite ±16 V differential input tolerance and −20 V to +70 V survival common-mode range.

It features dual EMI filters on both inputs, ±8000 V HBM ESD rating for shunt-based applications, and operates over −40°C to +125°C. The A1 output (Pin 3) and A2 input (Pin 4) are externally accessible to support gain adjustment (e.g., 7–50 V/V) and single- or two-pole low-pass filtering via external capacitors or resistors.

Key Specifications

Pinout & Package

AD8209AWBRMZ-R7 is housed in an 8-lead Mini Small Outline Package (MSOP, RM-8) with 0.65 mm pitch, 3.0 mm × 3.0 mm body, and exposed pad for thermal performance. Pin 6 is Do Not Connect (DNC); two GND pins (Pins 2 and 2′) provide low-impedance return paths.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage difference amplifier applications.

Compared with MAX40016ATA+T and INA240A1QDRQ1, the AD8209AWBRMZ-R7 uniquely combines AEC-Q100 qualification, integrated EMI filtering, 5 V operation, and field-configurable gain/filtering-making it optimal for cost-sensitive, analog-output automotive subsystems requiring robustness and design flexibility.

Availability

AD8209AWBRMZ-R7 is available at Aetrix Electronics and suitable for high-side current sensing, motor controls, solenoid diagnostics, and power management applications requiring stable component supply across automotive production lifecycles.

Supply support for AD8209AWBRMZ-R7 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, communications, and healthcare markets with precision signal chain solutions.

The AD8209A product line was designed specifically for robust, high-accuracy current sensing in automotive powertrain and chassis systems-emphasizing AEC-Q100 compliance, wide common-mode operation, and integrated noise immunity for demanding real-world environments.

FAQ

What is the maximum common-mode voltage the AD8209AWBRMZ-R7 can survive without damage?

The AD8209AWBRMZ-R7 has a continuous input common-mode voltage survival rating of −20 V to +70 V, as specified in its Absolute Maximum Ratings table. This allows safe operation during severe battery transients, load dump events, and inductive kickback in automotive solenoid and motor control applications-exceeding ISO 7637-2 Pulse 5a requirements. The device remains functional within −2 V to +50 V during normal operation.

Can the AD8209AWBRMZ-R7 be used for low-side current sensing?

Yes, the AD8209AWBRMZ-R7 supports low-side current sensing configurations as documented in its Applications Information section. In this mode, it rejects ground noise and maintains high input-to-output linearity regardless of differential input voltage magnitude. Its −2 V lower common-mode limit accommodates negative voltage excursions during switch turn-off, and its 80 dB CMRR ensures accuracy even with noisy ground returns in high-current PCB traces.

How does the AD8209AWBRMZ-R7 achieve its 80 dB CMRR specification?

The AD8209AWBRMZ-R7 achieves ≥80 dB CMRR from dc to 10 kHz through laser trimming of its internal resistor network (RA, RB, RC, RF) to better than 0.01% ratio matching. This precision matching minimizes common-mode signal conversion to differential error. Combined with balanced EMI filtering on both inputs and a fully differential preamplifier stage (A1), the architecture rejects high-frequency noise and low-frequency offsets simultaneously-verified across temperature and process variation.

What is the purpose of the A1 and A2 pins on the AD8209AWBRMZ-R7?

Pin 3 (A1) is the buffered output of the 7 V/V preamplifier stage; Pin 4 (A2) is the high-impedance input to the 2 V/V output buffer stage. These pins enable external configuration: shorting them sets the default 14 V/V gain, connecting a capacitor from A1 to GND creates a single-pole low-pass filter, and adding resistors enables gain adjustment (7–50 V/V) or two-pole filtering. Their separation provides design flexibility not found in monolithic fixed-gain amplifiers.

Is the AD8209AWBRMZ-R7 RoHS compliant and halogen-free?

Yes, the AD8209AWBRMZ-R7 is RoHS compliant (per ordering guide footnote "Z = RoHS Compliant Part") and meets JEDEC MSOP package standards (MO-187-AA). Analog Devices confirms halogen-free status for this part number in its official material declarations-suitable for automotive and industrial applications requiring strict environmental compliance and long-term reliability under thermal stress.