Analog Devices Inc. AD8276BRMZ-R7

Overview

AD8276BRMZ-R7 from Analog Devices is a precision unity-gain difference amplifier optimized for low-power, wide-supply-range signal conditioning in current and voltage monitoring applications. It delivers 86 dB CMRR (dc to 10 kHz), 550 kHz bandwidth, ±2 µV/°C max system offset drift (B grade), 1 ppm/°C max gain drift, and operates from 2.0 V to 36 V single supply or ±2 V to ±18 V dual supply.

For engineers reviewing the AD8276BRMZ-R7 datasheet, AD8276BRMZ-R7 pinout, AD8276BRMZ-R7 application, or AD8276BRMZ-R7 equivalent, key selection criteria include rail-to-rail input voltage range beyond supplies, rugged input overvoltage protection up to ±40 V relative to rails, low 200 µA per-channel quiescent current, and integrated laser-trimmed 40 kΩ resistor network enabling high-accuracy differential measurement without external components.

Technical Context

The AD8276BRMZ-R7 integrates a low-noise op amp with four laser-trimmed on-chip 40 kΩ resistors configured as a precision difference amplifier. Its input stage uses internal resistor division to extend common-mode input range to nearly double the supply voltage while protecting the core amplifier from overvoltage.

It achieves 86 dB CMRR by maintaining tight resistor ratio matching (±0.005% gain error) and suppresses power supply variations with 80 dB PSRR at dc. The device is unity-gain stable and supports G = −1, +1, or +2 configurations via external connections to SENSE and REF pins.

Key Specifications

Pinout & Package

The AD8276BRMZ-R7 is housed in an 8-lead MSOP package (RM-8) with exposed pad for thermal enhancement. Pin 8 is NC (no connect); all other pins are electrically active and validated per Analog Devices Rev. D datasheet Figure 4 and Table 6.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA199A1DCKR and AD8476ARMZ-R7, the AD8276BRMZ-R7 uniquely balances ultra-high CMRR, rail-exceeding input range, and configurable gain architecture-making it the only choice for precision, low-power, wide-supply industrial monitoring where both accuracy and robustness are mandatory.

Availability

AD8276BRMZ-R7 is available at Aetrix Electronics and suitable for high-side current monitoring, industrial voltage measurement, battery management systems, portable medical diagnostics, and test equipment requiring stable component supply across extended temperature and voltage ranges.

Supply support for AD8276BRMZ-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 since 1965.

The AD8276/AD8277 product line was designed specifically for precision, low-power difference amplification in space-constrained, battery-sensitive, and high-common-mode industrial measurement systems-replacing discrete op-amp-and-resistor designs with guaranteed performance.

FAQ

What is the maximum input voltage the AD8276BRMZ-R7 can safely handle?

The AD8276BRMZ-R7 accepts input voltages from −VS + 40 V to +VS − 40 V. For example, with ±15 V supplies, inputs up to ±25 V are safe. This overvoltage tolerance eliminates external protection circuitry in 24 V industrial applications. Exceeding these limits risks permanent damage. Always verify absolute maximum ratings in the AD8276BRMZ-R7 datasheet before final design.

Does the AD8276BRMZ-R7 require external resistors for unity-gain difference operation?

No, the AD8276BRMZ-R7 integrates four laser-trimmed 40 kΩ resistors internally, forming a complete unity-gain difference amplifier. No external resistors are needed for standard G = 1 operation. External components are only required if configuring nonstandard gains (e.g., G = −1 or +2) using the SENSE and REF pins. This integration ensures guaranteed CMRR and gain drift specs.

Can the AD8276BRMZ-R7 operate from a single 3.3 V supply?

Yes, the AD8276BRMZ-R7 supports single-supply operation from 2.0 V to 36 V. At 3.3 V, it delivers 450 kHz bandwidth, 1.0 V/µs slew rate, and maintains 86 dB CMRR at low common-mode voltages. Output swing is −VS + 0.1 V to +VS − 0.15 V, allowing full-scale use with 3.3 V ADCs when REF is set to midsupply (1.65 V). Confirm performance in Table 3 of the AD8276BRMZ-R7 datasheet.

What is the purpose of the SENSE pin on the AD8276BRMZ-R7?

Pin 5 (SENSE) provides access to the internal op amp's output node, enabling flexible reconfiguration beyond unity gain. Connecting SENSE to REF creates a G = −1 inverter; connecting SENSE to +IN yields G = +2 noninverting amplifier. This pin unlocks three precision gain options using one AD8276BRMZ-R7, reducing inventory and design complexity versus fixed-gain alternatives.

Is the AD8276BRMZ-R7 RoHS compliant and qualified for industrial temperature range?

Yes, the AD8276BRMZ-R7 is fully RoHS compliant and specified for operation from −40°C to +85°C. It undergoes rigorous qualification per Analog Devices' industrial-grade standards, including extended temperature cycling and humidity testing. The MSOP package (RM-8) meets JEDEC J-STD-020 moisture sensitivity level 1, ensuring reliability in automated assembly and harsh operating environments.