Analog Devices Inc. AD8209AWBRMZ

Overview

AD8209AWBRMZ from Analog Devices is a high-voltage precision difference amplifier designed for high-side current sensing in automotive and industrial power systems. It delivers 14 V/V system gain, ±1 mV typical input offset voltage, −5 ppm/°C gain drift, and operates from −2 V to +50 V common-mode input range at 5 V supply-enabling accurate shunt-based current monitoring in motor controls and solenoid drivers.

For engineers reviewing the AD8209AWBRMZ datasheet, AD8209AWBRMZ pinout, AD8209AWBRMZ application, or AD8209AWBRMZ equivalent, this device supports AEC-Q100 qualified designs requiring robust ESD protection (±8 kV HBM), wide temperature operation (−40°C to +125°C), and integrated EMI filtering for noisy automotive environments.

Technical Context

The AD8209AWBRMZ implements a two-stage architecture: a preamplifier (A1) with 7 V/V gain and buffered output via an externally accessible 100 kΩ resistor, followed by a 2 V/V output buffer (A2). Its laser-trimmed resistor network achieves ≥80 dB CMRR from dc to 10 kHz and supports configurable low-pass filtering via Pin 3 (A1) and Pin 4 (A2).

It features enhanced input overvoltage survival (−20 V to +70 V), reverse supply protection (0.3 V), and operates with 1.6 mA quiescent current at 5 V. The internal 350 mV reference enables stable operation down to −2 V common-mode voltage while maintaining rail-to-rail output swing (0.05 V to VS − 0.1 V).

Key Specifications

Pinout & Package

AD8209AWBRMZ is housed in an 8-lead MSOP (RM-8) package 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); Pins 1 and 8 are differential inputs; Pin 3 provides access to preamplifier output for filter/gain customization.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA240A1QDRQ1 and MAX40056ATA+T, the AD8209AWBRMZ uniquely combines AEC-Q100 qualification, ±8 kV HBM ESD, externally accessible A1 output for gain/filter tuning, and −2 V to +50 V operating common-mode range-making it the only option for high-flexibility, automotive-grade high-side current sensing where transient resilience and configurability are critical.

Availability

AD8209AWBRMZ is available at Aetrix Electronics and suitable for automotive motor controls, industrial power management, and solenoid diagnostic systems requiring stable component supply across extended temperature and high-reliability production cycles.

Supply support for AD8209AWBRMZ 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 consumer markets.

The AD8209A product line delivers precision current sensing amplifiers engineered for AEC-Q100 compliance, high common-mode rejection, and robust operation in electric powertrain, braking, and chassis control systems.

FAQ

What is the maximum common-mode voltage the AD8209AWBRMZ can survive during transient events?

The AD8209AWBRMZ survives common-mode voltages from −20 V to +70 V continuously, as specified in its Absolute Maximum Ratings table. This includes protection against ISO 7637-2 load-dump pulses and jump-start conditions in automotive 12 V and 24 V systems. Operation remains functional within −2 V to +50 V, and the device maintains integrity beyond those limits without damage.

Can the AD8209AWBRMZ be used for low-side current sensing, and how does its performance compare to high-side use?

Yes, the AD8209AWBRMZ supports low-side current sensing per its Applications Information section. In that configuration, it rejects ground noise and maintains high input-to-output linearity. Its −2 V to +50 V common-mode range and 80 dB CMRR ensure accuracy even with noisy ground returns, though high-side use better enables diagnostics like short-to-ground detection-making AD8209AWBRMZ versatile across both topologies.

How is gain adjusted below 14 V/V on the AD8209AWBRMZ, and what is the impact on bandwidth?

Gain below 14 V/V is set by connecting an external resistor (R_EXT) from Pin 3 (A1) to GND, reducing gain by the factor R_EXT/(100 kΩ + R_EXT). For example, R_EXT = 100 kΩ yields 7 V/V. This method preserves the full 100 kHz bandwidth because only the A2 stage gain changes; the A1 stage remains fixed at 7 V/V, and no additional poles are introduced into the signal path.

Does the AD8209AWBRMZ require external components for basic operation, or is it functional with only power and signal connections?

The AD8209AWBRMZ operates fully functional with only VS, GND, +IN, −IN, and load on OUT-no external components required for default 14 V/V gain. Pins 3 (A1) and 4 (A2) may be shorted to enable standard operation; leaving them unconnected disables the buffer stage. External capacitors or resistors are optional, used only for filtering, gain adjustment, or offset nulling per application needs.

What packaging and marking identify the AD8209AWBRMZ as automotive-grade?

The AD8209AWBRMZ uses the RM-8 MSOP package and carries the Y5X branding per the Ordering Guide. The "W" in the part number denotes automotive qualification, and the device is explicitly listed in the Automotive Products section as meeting AEC-Q100 Grade 1 requirements (−40°C to +125°C), with controlled manufacturing and reliability reporting available through Analog Devices.