Analog Devices Inc. AD8202YRZ-R7

Overview

AD8202YRZ-R7 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, ±2 mV initial input offset (RTI), and 80 dB minimum CMRR from dc to 10 kHz - enabling precise shunt-based current measurement in battery-supply circuits such as diesel injection control.

For engineers reviewing the AD8202YRZ-R7 datasheet, AD8202YRZ-R7 pinout, AD8202YRZ-R7 application, or AD8202YRZ-R7 equivalent, key selection criteria include its extended common-mode tolerance beyond supply rails, integrated two-stage gain architecture with externally configurable low-pass filtering, and AEC-Q100-qualified performance across −40°C to +125°C.

Technical Context

The AD8202YRZ-R7 implements a dynamic bridge (subtractor) topology with matched resistor networks to reject common-mode voltages while amplifying differential signals. Its preamplifier stage provides ×10 gain with 100 kΩ series output impedance, feeding a ×2 buffer stage - enabling external RC filtering at Pin 3 before final gain restoration.

This two-stage architecture supports gain adjustment (±20 to >50×) and low-pass filtering without bandwidth degradation. The device uses internal RCM trimming and dedicated feedback (A3) to extend common-mode range below ground and improve RTI performance, achieving ±1 ppm/°C typical gain drift and 0.3 µV/°C typical offset drift in SOIC package.

Key Specifications

Pinout & Package

AD8202YRZ-R7 is housed in an 8-lead SOIC (R) package with exposed pad for thermal enhancement. Pin 7 is NC (no connect); all other pins are electrically active and functionally defined per Analog Devices Rev. H datasheet.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD8202YRZ-R7, AD8203YRZ-R7 trades bandwidth and gain for extended CMV, while INA240A1QDRQ1 offers higher speed and rail tolerance at the cost of increased supply current and layout sensitivity - making AD8202YRZ-R7 optimal for cost-sensitive, medium-bandwidth automotive current sensing where −6 V to +28 V CMV coverage is sufficient.

Availability

AD8202YRZ-R7 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 AD8202YRZ-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 industrial, automotive, communications, and healthcare markets.

The AD8202YRZ-R7 belongs to Analog Devices' precision current-sensing amplifier product line, engineered specifically for robust, high-accuracy shunt-based measurement in harsh automotive environments with wide common-mode voltage excursions.

FAQ

What is the maximum common-mode voltage the AD8202YRZ-R7 can handle at 5 V supply?

The AD8202YRZ-R7 supports a continuous common-mode voltage range of −6 V to +28 V when operated at a 5 V supply voltage. This allows direct connection to battery rails and high-side shunts without external attenuation or level-shifting circuitry. Transient input voltage tolerance is rated at 44 V for 400 ms per Absolute Maximum Ratings table.

Does the AD8202YRZ-R7 require external components to achieve its default 20× gain?

No, the AD8202YRZ-R7 achieves its default 20× system gain (×10 preamp × ×2 buffer) with no external components when Pins 3 (A1) and 4 (A2) are shorted together. This configuration is validated in the datasheet's Figure 43 and Table 1, and forms the basis for all standard current-sensing implementations using AD8202YRZ-R7.

Is the AD8202YRZ-R7 qualified for automotive applications?

Yes, the AD8202YRZ-R7 is AEC-Q100 qualified for automotive use (Grade 1: −40°C to +125°C). It undergoes stress testing including high-temperature operating life, temperature cycling, and ESD per JESD22 standards. The SOIC package variant (YRZ) is explicitly specified across this full temperature range in the Ordering Guide and General Description sections of the Rev. H datasheet.

Can the AD8202YRZ-R7 be used for bidirectional current sensing?

Yes, the AD8202YRZ-R7 supports bidirectional current sensing by interpreting output polarity relative to mid-supply. With a 5 V supply, its output swings from 0.04 V to 4.8 V; a centered output near 2.5 V indicates zero current, while deviations above or below indicate direction and magnitude - provided the shunt is placed in a floating or high-side configuration that preserves differential signaling.

What is the purpose of the 100 kΩ resistor between Pin 3 and Pin 4 in the AD8202YRZ-R7 functional diagram?

The 100 kΩ resistor is internal to the AD8202YRZ-R7 and connects the preamplifier (A1) output to the buffer (A2) input. It is not a discrete external component but a designed feature enabling low-pass filtering and gain adjustment: external capacitors to ground at Pin 3 form a 1-pole or 2-pole filter, and external resistors to GND or feedback paths modify overall gain without affecting bandwidth - a core capability documented in the Applications section of the AD8202YRZ-R7 datasheet.