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1 Features

? Enhanced Plastic

– Single controlled baseline

– One fabrication, assembly and test site

– Gold wire

– NiPdAu lead finish

– Available in military (–55°C to 125°C)

temperature range

– Extended product life cycle

– Extended product-change notification

– Product traceability

– Enhanced mold compound for low outgassing

? Low offset voltage: ±125 μV

? Low noise: 10.8 nV/√Hz at 1 kHz

? High common-mode rejection: 130 dB

? Low bias current: ±10 pA

? Rail-to-rail input and output

? Wide bandwidth: 4.5 MHz GBW

? High slew rate: 21 V/μs

? High capacitive load drive: 1 nF

? MUX-friendly/comparator inputs

? Low quiescent current: 560 μA per amplifier

? Wide supply: ±1.35 V to ±20 V, 2.7 V to 40 V

? Robust EMIRR performance: EMI/RFI filters on

input and supply pins

2 Applications

? Land mobile radio

? Sonar

? Low-power audio preamplifier

? Multiplexed data-acquisition systems

? Test and measurement equipment

? ADC driver amplifiers

? SAR ADC reference buffers

? Programmable logic controllers

? High-side and low-side current sensing

3 Description

The OPA4991-EP is a high voltage (40 V) general

purpose operational amplifiers available in enhanced

plastic packaging. The device offers exceptional DC

precision and AC performance, including rail-to-rail

input/output, low offset (±125 μV, typ), low offset drift

(±0.3 μV/°C, typ), low noise (10.8 nV/√Hz and 1.8

μVPP), and 4.5-MHz bandwidth.

Unique features such as differential and commonmode

input-voltage range to the supply rail, high

output current (±75 mA), high slew rate (21 V/μs), and

high capacitive load drive (1 nF) make the OPA4991-

EP a robust, high-performance operational amplifier

for high-voltage applications.

The OPA4991-EP is available in SOT-23 (DYY)

package and is specified from –55°C to 125°C.