Analog Devices Inc. ADA4097-2BRZ

Overview

ADA4097-2BRZ from Analog Devices is a dual-channel, precision, Over-The-Top™ operational amplifier designed for high-voltage, low-power sensor signal conditioning in harsh industrial environments. It operates from +3 V to +50 V supply, delivers 130 kHz gain-bandwidth, draws only 32.5 µA per channel, and supports rail-to-rail input/output with common-mode range extending to −VS − 0.1 V and up to −VS + 70 V - enabling direct battery voltage monitoring and current sensing in abusive 4–20 mA transmitter front ends.

For engineers reviewing the ADA4097-2BRZ datasheet, ADA4097-2BRZ pinout, ADA4097-2BRZ application, or ADA4097-2BRZ equivalent, this page provides verified specifications, SOIC_N package mapping, dual-channel shutdown behavior, Over-The-Top™ input tolerance validation, and real-world use cases in supply current sensing and high-CM industrial transmitters - all confirmed against Analog Devices Rev. A datasheet.

Technical Context

The ADA4097-2BRZ implements a proprietary Over-The-Top™ input stage that enables operation with inputs up to 70 V above −VS while maintaining ±60 µV max offset and 120 dB CMRR across that full range. Its input protection tolerates ±80 V differential voltage without phase reversal or accuracy degradation.

This dual op amp features independent shutdown control (SHDN1/SHDN2), unity-gain stability, and drives capacitive loads up to 200 pF. It achieves 0.1 V/µs slew rate and 120 dB large-signal voltage gain at ΔVOUT = 3.5 V, supporting precision DC-coupled amplification in high-impedance sensor interfaces.

Key Specifications

Pinout & Package

ADA4097-2BRZ is packaged in an 8-lead SOIC_N (Small Outline Integrated Circuit, Narrow) with standard 1.27 mm pitch and exposed thermal pad not present - distinct from the LFCSP variant. Pin 1 is marked by a beveled corner or dot; orientation follows JEDEC MS-012.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision, high-voltage op amp applications.

Compared with LT6015IMS8#PBF and OPA2189IDR, ADA4097-2BRZ uniquely combines 70 V Over-The-Top™ input tolerance, 32.5 µA quiescent current, and SOIC_N packaging - making it the only drop-in solution for high-CM, low-power industrial sensing where input voltage exceeds the positive supply.

Availability

ADA4097-2BRZ is available at Aetrix Electronics and suitable for industrial sensor conditioning, supply current sensing, and battery monitoring applications requiring stable component supply across extended temperature and high-voltage operating conditions.

Supply support for ADA4097-2BRZ 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 ADA4097-2BRZ belongs to Analog Devices' Over-The-Top™ precision op amp family, engineered specifically for ruggedized signal conditioning in abusive industrial environments where input voltage exceeds supply rails and long-term reliability under thermal stress is critical.

FAQ

What is the maximum common-mode input voltage for ADA4097-2BRZ?

The ADA4097-2BRZ supports a guaranteed common-mode input range from −VS − 0.1 V to −VS + 70 V. This Over-The-Top™ capability allows the inputs to operate up to 70 V above the negative supply rail - enabling direct high-side current sensing and battery voltage monitoring without external level-shifting circuitry. The specification is validated across temperature and supply conditions per Analog Devices Rev. A datasheet Table 1.

Does ADA4097-2BRZ have shutdown functionality, and how is it controlled?

Yes, ADA4097-2BRZ includes independent shutdown control for each channel via SHDN1 (Pin 5) and SHDN2 (Pin 6) in the SOIC_N package. An input voltage > −VS + 1.5 V places the corresponding amplifier in shutdown, reducing supply current to ≤20 µA per channel and placing the output in high-impedance state. The threshold is referenced to −VS, not ground, ensuring reliable operation in split-supply configurations. This behavior is confirmed in datasheet Sections "SHDN AND SHDNx PINS" and Figure 5.

What package type is ADA4097-2BRZ, and does it include an exposed thermal pad?

ADA4097-2BRZ is supplied in an 8-lead SOIC_N (narrow-body small outline IC) package per JEDEC MS-012, with 1.27 mm lead pitch and no exposed thermal pad. This distinguishes it from the 10-lead LFCSP variant (ADA4097-2ACPZ-R7), which includes an EPAD connected to −VS. The BRZ suffix explicitly denotes the SOIC_N package, and pinout matches Table 7 in the Rev. A datasheet - critical for PCB layout and thermal design verification.

Can ADA4097-2BRZ drive capacitive loads, and what is the maximum supported value?

Yes, ADA4097-2BRZ is specified to drive capacitive loads up to 200 pF while maintaining stability, as stated in the General Description section of the Rev. A datasheet. This capability supports direct interfacing with ADC input capacitors, long cables, or filtering networks without requiring isolation resistors. For loads >200 pF, external compensation (e.g., series R between output and cap) is recommended per Application Information Section 23.

What is the input voltage noise performance of ADA4097-2BRZ at low frequencies?

ADA4097-2BRZ delivers 1000 nV p-p input voltage noise over 0.1 Hz to 10 Hz, with a 6 Hz 1/f noise corner - confirmed in Table 1 (5 V Supply) and Table 2 (±15 V Supply) of the Rev. A datasheet. This low flicker noise enables high-fidelity amplification of DC and near-DC signals such as thermocouple outputs or strain gauge bridges, where low-frequency noise directly impacts measurement resolution.