Analog Devices Inc. AD8276ARMZ-RL

Overview

AD8276ARMZ-RL 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 system offset drift (B grade), 1 ppm/°C 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 AD8276ARMZ-RL datasheet, AD8276ARMZ-RL pinout, AD8276ARMZ-RL application, or AD8276ARMZ-RL equivalent, this device is selected for high-accuracy differential measurement where rail-to-rail input common-mode range, ultra-low quiescent current (200 µA), and integrated laser-trimmed resistors eliminate discrete component matching errors.

Technical Context

The AD8276ARMZ-RL integrates a low-power op amp with four on-chip laser-trimmed 40 kΩ resistors to form a fixed G = 1 difference amplifier. Its input stage accepts common-mode voltages up to ±2(V_S − 1.5) V, enabling measurement beyond supply rails without external level-shifting circuitry.

Internal resistor ratio matching ensures 86 dB CMRR and <1 ppm/°C gain drift over −40°C to +85°C. The SENSE terminal provides Kelvin sensing capability for accurate output voltage regulation, while rugged input ESD protection supports ±40 V absolute input voltage tolerance relative to supplies.

Key Specifications

Pinout & Package

AD8276ARMZ-RL is housed in an 8-lead MSOP (RM-8) package with exposed pad for thermal enhancement. Pin 8 is NC (no connect); all other pins are electrically functional 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 AD8276ARMZ-RL, AD8271ARMZ-R7 trades power efficiency for speed, while INA199A1DCKR sacrifices flexibility and CMRR for ultra-low power and integrated high-side biasing - making AD8276ARMZ-RL the optimal balance for precision, low-power, wide-supply difference amplification.

Availability

AD8276ARMZ-RL is available at Aetrix Electronics and suitable for current measurement, voltage monitoring, and portable instrumentation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for AD8276ARMZ-RL 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, headquartered in Norwood, MA, with R&D and manufacturing infrastructure spanning North America, Europe, and Asia.

The AD8276/AD8277 product line was designed specifically for precision, low-power difference amplification in energy-efficient industrial, automotive, and portable measurement systems - emphasizing rail-to-rail input operation, laser-trimmed resistor accuracy, and robust input protection.

FAQ

What is the maximum input common-mode voltage for AD8276ARMZ-RL on a +5 V single supply?

The AD8276ARMZ-RL supports an input common-mode voltage range of −2(V_S + 0.1) V to +2(V_S − 1.5) V. With V_S = +5 V, this yields −10.2 V to +7.0 V. This extended range allows the AD8276ARMZ-RL to accurately measure signals far beyond the supply rails - critical for high-side shunt monitoring and isolated bus sensing where input voltages exceed the 5 V rail.

Does AD8276ARMZ-RL require external resistors to operate as a difference amplifier?

No. The AD8276ARMZ-RL integrates four laser-trimmed 40 kΩ resistors internally, forming a complete unity-gain difference amplifier. No external gain-setting resistors are needed for G = 1 operation. External components are only required for nonstandard configurations (e.g., G = −1 or +2) or filtering - the AD8276ARMZ-RL delivers fully specified performance out-of-the-box with just power, input, reference, and output connections.

Can AD8276ARMZ-RL be used with unbalanced dual supplies?

Yes. The AD8276ARMZ-RL supports unbalanced dual supplies such as −0.5 V and +2 V, provided the positive supply rail is at least 2 V above the negative supply and reference voltage. This flexibility enables operation in legacy systems with asymmetric rails or specialized low-voltage biasing schemes - the AD8276ARMZ-RL maintains full specification compliance across its entire ±2 V to ±18 V dual-supply range regardless of balance.

What is the purpose of the SENSE pin on AD8276ARMZ-RL?

Pin 5 (SENSE) on the AD8276ARMZ-RL enables Kelvin (4-wire) sensing of the output path. When connected directly to the load or feedback point, it compensates for voltage drop across PCB traces or connectors, ensuring the output voltage is regulated precisely at the remote point - essential for high-accuracy current source outputs and precision voltage monitoring where trace resistance would otherwise introduce error.

Is AD8276ARMZ-RL suitable for driving ADC inputs directly?

Yes. The AD8276ARMZ-RL features rail-to-rail output swing (±V_S − 0.2 V at ±15 V), low output impedance, and 550 kHz bandwidth - making it well-suited to drive SAR and delta-sigma ADCs with input ranges up to ±10 V. Its 200 µA quiescent current and low noise (65 nV/√Hz) ensure minimal power impact and high SNR, especially when paired with 16–24-bit precision converters in AD8276ARMZ-RL-based data acquisition systems.