Analog Devices Inc. ADA4097-2BRMZ

Overview

ADA4097-2BRMZ from Analog Devices is a dual-channel, precision, Over-The-Top™ operational amplifier designed for high-voltage, low-power sensor signal conditioning in harsh environments. It operates from +3 V to +50 V supply, delivers 130 kHz gain bandwidth, 32.5 µA per channel quiescent current, and supports common-mode inputs up to 70 V above the negative rail - enabling direct battery voltage monitoring and industrial current sensing.

For engineers reviewing the ADA4097-2BRMZ datasheet, ADA4097-2BRMZ pinout, ADA4097-2BRMZ application, or ADA4097-2BRMZ equivalent, this page provides verified specifications, SOIC_N package layout, robust input protection details, and validated alternatives for abusive-environment analog front-ends requiring rail-to-rail I/O, ±2 kV HBM ESD tolerance, and −55°C to +150°C operation.

Technical Context

The ADA4097-2BRMZ implements an Over-The-Top™ input stage that extends common-mode range to −VS − 0.1 V to −VS + 70 V independent of +VS, enabling accurate sensing in systems where input signals exceed the positive supply (e.g., battery monitoring with ground-referenced shunts). Its input stage tolerates ±80 V differential voltage without damage or dc accuracy degradation.

It features dual independent shutdown pins (SHDN1/SHDN2) with logic thresholds referenced to −VS (−VS + 0.5 V low, −VS + 1.5 V high), 0.1 V/µs slew rate, and unity-gain stability driving ≥20 mA loads or 200 pF capacitive loads - supporting precision transimpedance and current-sense amplifier configurations without external compensation.

Key Specifications

Pinout & Package

ADA4097-2BRMZ is packaged in an 8-lead SOIC_N (Small Outline Integrated Circuit, Narrow) with standard 1.27 mm pitch and exposed pad not present. Pin 1 is marked by a beveled corner or dot; the device is lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision op amp applications.

Compared with ADA4091-2ARZ and OPA2333AIDR, ADA4097-2BRMZ uniquely combines 50 V operation, 70 V over-the-negative-rail input, ±80 V differential tolerance, and −55°C to +150°C qualification - making it irreplaceable in high-voltage industrial monitoring where input fault resilience is non-negotiable.

Availability

ADA4097-2BRMZ is available at Aetrix Electronics and suitable for industrial sensor conditioning, battery monitoring, and 4–20 mA transmitter designs requiring stable component supply across extended temperature and high-voltage operating conditions.

Supply support for ADA4097-2BRMZ 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.

The ADA4097 family was engineered specifically for precision signal acquisition in electrically hostile environments - targeting applications demanding Over-The-Top™ input operation, wide supply range, and extreme temperature reliability without sacrificing dc accuracy.

FAQ

What is the maximum continuous supply voltage rating for ADA4097-2BRMZ?

The ADA4097-2BRMZ has a maximum continuous supply voltage of +50 V, limited by time-dependent dielectric breakdown (TDDB) of on-chip capacitor oxides. Transient overshoot up to +60 V is tolerated per absolute maximum ratings, but dc operation must remain ≤50 V. This rating applies to both single-supply (+VS to −VS) and split-supply (±VS) configurations, and is validated across the full −55°C to +150°C temperature range for the H-grade device.

Does ADA4097-2BRMZ support Over-The-Top™ operation in dual-channel mode?

Yes, ADA4097-2BRMZ supports full Over-The-Top™ operation on both channels simultaneously: each input pair (+IN1/−IN1 and +IN2/−IN2) operates from −VS − 0.1 V to −VS + 70 V, independent of the +VS supply voltage. This enables dual independent high-side current sensing or split-rail sensor buffering without cross-talk or shared reference constraints - confirmed in Table 1 and Figure 26 of the Rev. A datasheet.

What is the shutdown behavior of ADA4097-2BRMZ outputs?

When either SHDN1 or SHDN2 is asserted high (VSHDN > −VS + 1.5 V), the corresponding output (VOUT1 or VOUT2) enters a high-impedance state with leakage ≤±100 nA (typical). The non-shutdown channel remains fully operational. Output disable timing is 100 µs (active-to-shutdown), and re-enable time is 2.5 µs (shutdown-to-active), as specified in Table 1 under "SHDN AND SHDNx PINS" - ensuring fast power gating in duty-cycled systems.

Can ADA4097-2BRMZ drive a 10 kΩ load while maintaining 120 dB open-loop gain?

Yes, ADA4097-2BRMZ guarantees minimum large-signal voltage gain of 96 dB with RLOAD = 10 kΩ and ΔVOUT = 3.5 V (5 V supply) or ΔVOUT = 25 V (±15 V supply), per Table 1 and Table 2. At lighter loads (e.g., 499 kΩ), gain improves to ≥120 dB. This confirms suitability for precision closed-loop configurations like programmable gain amplifiers and active filters where gain stability under load is critical.

Is ADA4097-2BRMZ pin-compatible with other SOIC_N dual op amps?

No, ADA4097-2BRMZ uses a proprietary SOIC_N pinout optimized for Over-The-Top™ operation and independent shutdown: Pin 1 = VOUT1, Pin 2 = −IN1, Pin 3 = +IN1, Pin 4 = −VS, Pin 5 = +IN2, Pin 6 = −IN2, Pin 7 = VOUT2, Pin 8 = +VS. This differs from industry-standard dual op amp pinouts (e.g., TL072, OP2177), where Pin 1 is typically NC or offset null. Substitution requires PCB redesign.