Data Sheet
ADA4098-1/ADA4098-2
50 V, 1 MHz, 165 µA per Channel, Robust, Over-The-Top, Precision Op Amps
FEATURES
GENERAL DESCRIPTION
► 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
► Low power supply current shutdown: 20 µA maximum
► Low input offset current: ±700 pA maximum
► Large signal voltage gain: 126 dB minimum for ΔVOUT = 3.5 V
► CMRR: 120 dB minimum at VCM = −0.1 V to +70 V
► PSRR: 123 dB minimum at VSY = +3 V to ±25 V
► Input overdrive tolerant with no phase reversal
► ±3 kV HBM and ±1.25 kV FICDM
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).
► Wide temperature range: −55°C to +150°C (H grade)
APPLICATIONS
► Industrial sensor conditioning
► Supply current sensing
► Battery and power supply monitoring
► Front-end amplifiers in abusive environments
► 4 mA to 20 mA transmitters
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
Rev. B
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