Data Sheet

ADA4098-1/ADA4098-2

50 V, 1 MHz, 165 µA per Channel, Robust, Over-The-Top, Precision Op Amps

Rev. B

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FEATURES

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Ultrawide common-mode input range: −VS − 0.1 V to −VS + 70 V

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Wide power supply voltage range: +3 V to +50 V (to ±25 V for

PSRR)

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Low power supply current: 165 µA per channel (typical)

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Low input offset voltage: ±35 µV maximum

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Low input offset voltage drift: ±0.5 µV/°C maximum (B grade)

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Low input voltage noise

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1/f noise corner: 6 Hz typical

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400 nV p-p typical at 0.1 Hz to 10 Hz

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17 nV/√Hz typical at 100 Hz

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High speed

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GBP: 1.05 MHz typical for fTEST = 2.5 kHz

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Slew rate: 0.85 V/µs typical at ΔVOUT = 25 V

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Low power supply current shutdown: 20 µA maximum

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Low input offset current: ±700 pA maximum

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Large signal voltage gain: 126 dB minimum for ΔVOUT = 3.5 V

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CMRR: 120 dB minimum at VCM = −0.1 V to +70 V

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PSRR: 123 dB minimum at VSY = +3 V to ±25 V

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Input overdrive tolerant with no phase reversal

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±3 kV HBM and ±1.25 kV FICDM

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Wide temperature range: −55°C to +150°C (H grade)

APPLICATIONS

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Industrial sensor conditioning

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Supply current sensing

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Battery and power supply monitoring

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Front-end amplifiers in abusive environments

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4 mA to 20 mA transmitters

GENERAL DESCRIPTION

The ADA4098-1 and ADA4098-2 are single/dual robust, precision,

rail-to-rail input and output operational amplifiers (op amps) with

inputs that operate from −VS to +VS and beyond, which is referred

to in this data sheet as Over-The-Top™. The devices feature offset

voltages of <35 µV, input bias currents (IB) of <700 pA, and can

operate on single or split supplies that range from 3 V to 50 V.

The ADA4098-1 and ADA4098-2 draw 165 µA of supply current per

channel.

The ADA4098-1 and ADA4098-2 Over-The-Top™ input stages have

robust input protection features for abusive environments. The

inputs can tolerate up to 80 V of differential voltage without damage

or degradation to dc accuracy. The operating common-mode input

range extends from rail-to-rail and beyond, up to 70 V > –VS,

independent of the +VS supply.

The ADA4098-1 and ADA4098-2 are unity-gain stable and can

drive loads requiring up to 20 mA per channel. The devices can

also drive capacitive loads as large as 200 pF. The amplifiers are

available with low power shutdown.

The ADA4098-1 is available in a standard, 6-lead thin small out-

line transistor (TSOT) package. The ADA4098-2 is available in

an 8-lead standard small outline (SOIC_N) package, 8-lead mini

small outline package (MSOP), and 10-lead lead-frame chip-scale

package (LFCSP).

TYPICAL APPLICATION CIRCUIT

Figure 1. 1 V/A Over-The-Top Current Sense Application (ADA4098-1 6-Lead

TSOT, VBAT Is the Battery Voltage)

Figure 2. Output Error vs. Load Current