40-V, dual 4.5-MHz, rail-to-rail input/output, low-offset-voltage, low-noise op amp
Product details
Parameters
Package | Pins | Size
Features
- Low offset voltage: ±125 µV
- Low offset voltage drift: ±0.3 µV/°C
- 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
- Amplifier operates with differential inputs up to supply rail
- Amplifier can be used in open-loop or as comparator
- 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
- Differential and common-mode input voltage range to supply rail
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Description
The OPAx991 family (OPA991, OPA2991, and OPA4991) is a family of high voltage (40-V) general purpose operational amplifiers. These devices offer 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 (10.5 nV/√ Hz and 1.8 µVPP) and 4.5-MHz bandwidth.
Unique features such as differential and common-mode input-voltage range to the supply rail, high output current (±75 mA), high slew rate (21 V/µs), high capacitive load drive (1 nF) and shutdown functionality make the OPAx991 a robust, high-performance operational amplifier for high-voltage industrial applications.
The OPAx991 family of op amps is available in
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | OPAx991 40-V Rail-to-Rail Input/Output, Low Offset Voltage, Low Noise Op Amp datasheet (Rev. D) | Jul. 16, 2020 |
Third party documents | Programmable analog output circuit maximizes industrial system flexibility | Feb. 01, 2021 | |
Technical article | What is an op amp? | Jan. 21, 2020 | |
Application note | Using An Op Amp for High-Side Current Sensing | Mar. 22, 2019 | |
Technical article | How to lay out a PCB for high-performance, low-side current-sensing designs | Feb. 06, 2018 | |
Technical article | Low-side current sensing for high-performance cost-sensitive applications | Jan. 22, 2018 | |
Technical article | Voltage and current sensing in HEV/EV applications | Nov. 22, 2017 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
Features
- Simplifies prototyping of small package ICs
- Supports 8 small package types
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
Features
- Expedites circuit design with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
- Noise calculations
- Common unit translation
- Solves common amplifier circuit design problems
- Gain selections using standard resistors
- Filter configurations
- Total noise for common amplifier configurations
- (...)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
QFN (RUC) | 14 | View options |
SOIC (D) | 14 | View options |
TSSOP (PW) | 14 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Support & training
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