Analog Devices Inc. AD8202WYRZ

Overview

AD8202WYRZ from Analog Devices is a single-supply, high common-mode voltage difference amplifier optimized for automotive current sensing. It delivers 20× system gain, −6 V to +28 V input common-mode range at 5 V supply, and 80 dB minimum CMRR from dc to 10 kHz. Its dual-stage architecture (×10 preamp + ×2 buffer) enables external low-pass filtering at Pin 3 and supports precision shunt-based measurements in battery-supply circuits.

For engineers reviewing the AD8202WYRZ datasheet, AD8202WYRZ pinout, AD8202WYRZ application, or AD8202WYRZ equivalent, this device is selected for high-reliability automotive subsystems requiring stable gain accuracy (±0.3% error), low offset drift (±1 ppm/°C), rail-to-rail output swing (48 mV to 4.8 V), and operation across −40°C to +125°C.

Technical Context

The AD8202WYRZ implements a dynamic bridge topology with matched resistor networks to extend common-mode range beyond supply rails while maintaining high CMRR. Its preamplifier stage uses active common-mode feedback (via A3 and RCM resistors) to offset input common-mode voltage applied to A1, enabling operation down to −6 V relative to ground.

The signal path separates gain into two stages: a ×10 preamp with 100 kΩ series output resistor (Pin 3) for filter insertion, followed by a ×2 buffer (A2) with 2 Ω output resistance. This architecture allows full-scale preamp output filtering before final gain restoration, preserving bandwidth integrity during gain adjustment.

Key Specifications

Pinout & Package

AD8202WYRZ is housed in an 8-lead SOIC package (WY suffix per Analog Devices ordering guide), with exposed pad for thermal performance in automotive under-hood environments. Pin 7 is NC (no connect); all other pins are electrically functional and thermally rated for −40°C to +125°C operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA117P and AD8207WYRZ, AD8202WYRZ uniquely balances wide CMV range, programmable gain architecture, and automotive temperature qualification-making it optimal for cost-sensitive, high-volume 12 V powertrain modules requiring design reuse across transmission, injection, and suspension subsystems.

Availability

AD8202WYRZ 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 AD8202WYRZ 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, and communications markets since 1965.

The AD8202WYRZ belongs to Analog Devices' precision difference amplifier product line, engineered specifically for robust current sensing in harsh automotive environments where reliability, temperature stability, and common-mode immunity are critical.

FAQ

What is the maximum continuous common-mode voltage the AD8202WYRZ can withstand?

The AD8202WYRZ supports a continuous common-mode voltage range of −6 V to +28 V when operated at a 5 V supply. This rating is validated per Analog Devices' Rev. H datasheet Table 1 and Absolute Maximum Ratings (Table 2), allowing direct interface with 12 V automotive battery rails-including transient overvoltage conditions up to +35 V for short durations. The AD8202WYRZ maintains specified performance across its full −40°C to +125°C temperature range under these conditions.

Can the AD8202WYRZ be used with a 3.3 V microcontroller ADC?

Yes, the AD8202WYRZ operates from 3.5 V to 12 V supply and delivers a rail-to-rail output swing of 48 mV to 4.8 V. When powered from 3.3 V, its output range adjusts proportionally (≈32 mV to 3.1 V), remaining fully compatible with 3.3 V ADC references. Its 2 Ω output resistance and 50 kHz bandwidth ensure minimal loading and settling time-critical for sampling shunt currents in real-time control loops using the AD8202WYRZ.

How does the AD8202WYRZ achieve high CMRR with inputs outside the supply rails?

The AD8202WYRZ achieves high CMRR beyond supply rails using a dynamic bridge topology with active common-mode feedback. Internal amplifier A3 monitors the common-mode voltage at the preamp inputs and adjusts matched RCM resistors to offset the effective input common-mode range. This technique extends usable CMV to −6 V and +28 V while preserving ≥80 dB CMRR up to 10 kHz-verified in Figure 8 of the AD8202WYRZ datasheet and confirmed across temperature extremes.

Is external filtering required when using the AD8202WYRZ in automotive applications?

External filtering is optional but recommended for noise-prone automotive environments. The AD8202WYRZ provides a dedicated 100 kΩ series resistor at Pin 3 (A1 output) specifically for inserting a 1-pole or 2-pole RC low-pass filter before the ×2 buffer stage. This architecture prevents aliasing in downstream ADCs and suppresses high-frequency EMI from ignition systems or DC-DC converters-without degrading the 50 kHz system bandwidth of the AD8202WYRZ.

What is the purpose of the NC pin (Pin 7) on the AD8202WYRZ?

Pin 7 on the AD8202WYRZ is designated NC (no connect) and is not bonded to any internal circuitry. It must remain unconnected in PCB layout to prevent parasitic capacitance, unintended thermal coupling, or mechanical stress on the die. This pin is explicitly defined in Figure 4 (Pin Configuration) and Table 3 (Pin Function Descriptions) of the AD8202WYRZ datasheet Rev. H and is consistent across all SOIC-packaged variants of the AD8202 family.