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

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 outline transistor (TSOT) package. The ADA4098-2 is available in an 8-lead standard small outline (SOICN) package, 8-lead mini small outline package (MSOP), and 10-lead lead-frame chip-scale package (LFCSP).

APPLICATIONS

* Industrial sensor conditioning

* Supply current sensing

* Battery and power supply monitoring

* Front-end amplifiers in abusive environments

* 4 mA to 20 mA transmitters

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

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

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

* Low input offset voltage: ±35 μV maximum

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

* Low input voltage noise

* 1/f noise corner: 6 Hz typical

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

* 17 nV/√Hz typical at 100 Hz

* High speed

* GBP: 1.05 MHz typical for fTEST = 2.5 kHz

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