Analog Devices Inc. ADA4097 Over-The-Top™ Precision Op Amps

Analog Devices Inc. ADA4097 Over-The-Top™ Precision Op Amps is a robust, precision, rail-to-rail input and output operational amplifier with inputs from −VS to +VS and beyond (Over-The-Top). The ADA4097 Op Amps provide offset voltages of <60μV, input bias currents (IB) of <0.3nA, and can operate on single or split supplies that range from 3V to 50V. Additionally, the ADA4097 draws 32.5μA of supply current.

The ADI ADA4097 Op Amps Over-The-Top input stage has robust input protection features for abusive environments. The inputs tolerate up to 80V of differential voltage without damage or degradation to dc accuracy. In addition, the operating common-mode input range extends from rail-to-rail and beyond, up to 70V > –VS, independent of the +VS supply.

The ADA4097 is unity-gain stable and drives loads requiring up to 20mA. The device can also drive capacitive loads as large as 200pF and is available with low power shutdown.

The ADA4097 Amps are housed in a standard, 6-lead, thin small outline transistor (TSOT) package.


  • Ultrawide common-mode input range of −VS − 0.1V to −VS + 70V
  • Wide power supply voltage range of +3V to +50V (to ±25V for PSRR)
  • 32.5μA (typical) Low power supply current
  • ±60μV Maximum low input offset voltage
  • Low input offset voltage drift of ±1 μV/°C maximum (B grade)
  • Low input voltage noise of 6Hz typical 1/f noise corner
  • 1000nV p-p typical at 0.1Hz to 10Hz
  • GBP of 130kHz typical for fTEST = 250Hz
  • Slew rate of 0.1V/μs typical at ΔVOUT = 4V
  • Low power supply current shutdown: 20μA maximum
  • ±300pA Maximum low input offset current
  • Large signal voltage gain of 120dB minimum for ΔVOUT = 4V
  • CMRR: 120dB minimum at VCM = −0.1V to +70V
  • PSRR: 123dB minimum at VSY = +3V to ±25V
  • Input overdrive tolerant with no phase reversal
  • ±2kV HBM and ±1.25kV FICDM
  • 6-lead TSOT package


  • Industrial sensor conditioning
  • Supply current sensing
  • Battery and power supply monitoring
  • Front-end amplifiers in abusive environments
  • 4mA to 20mA transmitters


Protect Against Overvoltages in Analog Front Ends
This article illustrates how Over-The-Top amplifiers can provide protection against overvoltage in industrial applications.

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Typical Application

Application Circuit Diagram - Analog Devices Inc. ADA4097 Over-The-Top™ Precision Op Amps
Published: 2021-06-28 | Updated: 2022-05-31