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
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View all 7 | 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
SMALL-AMP-DIP-EVM
Description
The Small-Amp-DIP-EVM speeds up small package op amp prototyping by providing a fast and easy way to interface with many industry-standard small-size packages. The Small-Amp-DIP-EVM supports 8 small package options including: DPW-5 (X2SON), DSG-8 (WSON), DCN-8 (SOT), DDF-8 (SOT), RUG-10 (X2QFN (...)
Features
- Simplifies prototyping of small package ICs
- Supports 8 small package types
Design tools & simulation
SBOMB47.ZIP (12 KB) - TINA-TI Reference Design
SBOMB48.ZIP (4 KB) - Macromodels
SBOMB49.ZIP (3 KB) - PSpice Model
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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
- (...)
TINA-TI — TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
ANALOG-ENGINEER-CALC — The Analog Engineer’s Calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting op-amp gain with feedback (...)
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
Information included:
- 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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