Analog Devices Inc. AD8202WYRMZ

Overview

AD8202WYRMZ from Analog Devices is a high common-mode voltage, single-supply difference amplifier designed for precision current sensing in automotive power rails. It delivers 20× system gain, ±2 mV initial input offset (RTI), 80 dB minimum CMRR from dc to 10 kHz, and operates from −6 V to +28 V common-mode voltage at 5 V supply - enabling direct placement in high-side battery monitoring circuits.

For engineers reviewing the AD8202WYRMZ datasheet, AD8202WYRMZ pinout, AD8202WYRMZ application, or AD8202WYRMZ equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade operating range (−40°C to +125°C), real-world current-sensing use cases, and two rigorously cross-referenced alternative parts with documented functional differences.

Technical Context

The AD8202WYRMZ implements a two-stage architecture: a ×10 preamplifier with dynamic bridge topology rejects common-mode voltage while attenuating differential signals, followed by a ×2 output buffer with matched feedback resistors. Its externally accessible 100 kΩ resistor at Pin 3 enables configurable low-pass filtering and gain adjustment without bandwidth degradation.

It features active common-mode compensation via internal amplifier A3 and trimmed RCM networks, extending input CMV range beyond supply rails. The open-collector–compatible output stage delivers rail-to-rail swing (0.04 V to 4.8 V) into 25 kΩ load, with 40 nA typical A2 input bias current and 2 Ω output resistance.

Key Specifications

Pinout & Package

Rounded Mini Small Outline Package (MSOP-8) with exposed pad; 3 mm × 3 mm footprint, 0.65 mm pitch, RoHS-compliant, qualified for automotive reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD8202WYRMZ, MAX4080TASA+ offers wider supply range but forfeits the critical 100 kΩ filter node and automotive temperature rating; INA180A3IDBVR matches gain and offset performance but fails AEC-Q100 qualification and cannot operate below −40°C - making AD8202WYRMZ the sole choice for under-hood engine management systems requiring robustness and design-in longevity.

Availability

AD8202WYRMZ is available at Aetrix Electronics and suitable for transmission control, diesel injection control, and engine management systems requiring stable component supply across automotive production lifecycles.

Supply support for AD8202WYRMZ 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 Norwood, MA.

The AD8202WYRMZ belongs to Analog Devices' automotive-qualified difference amplifier product line, engineered specifically for high-accuracy current sensing in harsh automotive environments including powertrain, chassis, and battery management systems.

FAQ

What is the maximum common-mode voltage the AD8202WYRMZ can handle?

The AD8202WYRMZ supports a continuous common-mode voltage range of −6 V to +28 V when operated at a 5 V supply voltage. This specification is validated per datasheet Table 1 and enables direct connection to 12 V/14 V automotive battery rails, including handling of negative transients during load dump or jump-start conditions. Absolute maximum ratings allow 35 V continuous CMV and 44 V transient (400 ms).

Does the AD8202WYRMZ require external components to achieve its 20× gain?

No, the AD8202WYRMZ achieves its 20× system gain (×10 preamplifier × ×2 buffer) internally with no external components required. The default configuration shorts Pin 3 (A1 output) to Pin 4 (A2 input) - a connection implemented on-chip in the MSOP-8 package. External resistors are optional and used only for gain adjustment or low-pass filtering, not for baseline functionality.

Is the AD8202WYRMZ pin-compatible with other members of the AD820x family?

No, the AD8202WYRMZ is not pin-compatible with AD8201 or AD8203. While all three share the same MSOP-8 footprint, their pin functions differ significantly: AD8201 uses Pin 3 as OUT and Pin 5 as A1, whereas AD8202WYRMZ assigns Pin 3 to A1 and Pin 5 to OUT. Interchanging them without schematic and layout revision will cause functional failure.

Can the AD8202WYRMZ be used for low-side current sensing?

Yes, the AD8202WYRMZ supports both high-side and low-side current sensing configurations. Figure 3 in the datasheet explicitly illustrates low-line current sensing where the device withstands voltages below system ground (e.g., −6 V CMV). Its symmetrical input structure and rail-to-rail output swing make it equally effective for shunt placement on either side of the load.

What is the purpose of the 100 kΩ resistor at Pin 3 of the AD8202WYRMZ?

The 100 kΩ resistor at Pin 3 is an integral part of the AD8202WYRMZ's architecture - it sits between the preamplifier A1 output and the buffer A2 input. It enables external low-pass filtering (by adding capacitor to GND) and gain adjustment (by adding resistor to GND or feedback paths), without affecting the preamp's stability or bandwidth. This node is unique to the AD8202WYRMZ and not present in functionally similar amplifiers like the INA180.