Single, 5.5-V, 3-MHz, RRIO operational amplifier
Product details
Parameters
Package | Pins | Size
Features
- RAIL-TO-RAIL INPUT
- RAIL-TO-RAIL OUTPUT (within 1mV)
- LOW QUIESCENT CURRENT: 150µA typ
- MicroSIZE PACKAGES
- SOT23-5
- MSOP-8
- TSSOP-14
- GAIN-BANDWIDTH
- OPA344: 1MHz, G ≥ 1
- OPA345: 3MHz, G ≥ 5
- SLEW RATE
- OPA344: 0.8V/µs
- OPA345: 2V/µs
- THD + NOISE: 0.006%
- APPLICATIONS
- PCMCIA CARDS
- DATA ACQUISITION
- PROCESS CONTROL
- AUDIO PROCESSING
- COMMUNICATIONS
- ACTIVE FILTERS
- TEST EQUIPMENT
All trademarks are the property of their respective owners.
Description
The OPA344 and OPA345 series rail-to-rail CMOS operational amplifiers are designed for precision, low-power, miniature applications. The OPA344 is unity gain stable, while the OPA345 is optimized for gains greater than or equal to five, and has a gain-bandwidth product of 3MHz.
The OPA344 and OPA345 are optimized to operate on a single supply from 2.5V and up to 5.5V with an input common-mode voltage range that extends 300mV beyond the supplies. Quiescent current is only 250µA (max).
Rail-to-rail input and output make them ideal for driving sampling analog-to-digital converters. They are also well suited for general purpose and audio applications and providing I/V conversion at the output of D/A converters. Single, dual and quad versions have identical specs for design flexibility.
A variety of packages are available. All are specified for operation from –40°C to 85°C. A SPICE macromodel for design analysis is available for download from www.ti.com.
Technical documentation
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View all 7 | Type | Title | Date | |
|---|---|---|---|
| * | Data sheet | Low Power, Single-Supply, Rail-To-Rail Operational MicroAmplifier™ Series datasheet (Rev. A) | Aug. 27, 2008 |
| * | Errata | Errata for OPAx344, OPAx345 Data Sheet Literature Number SBOS107 (Revision A) | Apr. 09, 2013 |
| Technical article | What is an op amp? | Jan. 21, 2020 | |
| 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 | |
| E-book | The Signal e-book: A compendium of blog posts on op amp design topics | Mar. 28, 2017 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
DIP-ADAPTER-EVM
Description
Speed up your op amp prototyping and testing with the DIP-Adapter-EVM, which provides a fast, easy and inexpensive way to interface with small, surface-mount ICs. You can connect any supported op amp using the included Samtec terminal strips or wire them directly to existing circuits.
The (...)
Features
- Simplifies prototyping of SMT IC’s
- Supports 6 common package types
- Low Cost
Description
The DIYAMP-EVM is a unique evaluation module (EVM) family that provides engineers and do it yourselfers (DIYers) with real-world amplifier circuits, enabling you to quickly evaluate design concepts and verify simulations. It is available in three industry-standard packages (SC70, SOT23, SOIC) and 12 (...)
Features
- 3 packages to choose from: SC70-5, SOT23-5 and SOIC-8
- 12 circuit configurations to choose from: Noninverting, Inverting, Active Filters, Difference Amp, Comparator and more!
- Dual and single supply configurations
- PCB designed for High performance: Optimized for each function
- Multiple interface options (...)
Design tools & simulation
SBOC012C.ZIP (55 KB) - PSpice Model
SBOC199D.TSC (93 KB) - TINA-TI Reference Design
SBOM277C.ZIP (5 KB) - TINA-TI Spice 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
- (...)
CIRCUIT060013 — This design inverts the input signal, VIN, and applies a signal gain of 1000 V/V or 60 dB. The inverting amplifier with T-feedback network can be used to obtain a high gain without a small value for R4 or very large values for the feedback resistors.
Features
- Dual +/- 5-V supply
- Input: +/- 2.5 mV
- Output: +/- 2.5 V
- Bandwidth: 5 kHz
- Gain: 1000 V/V
CIRCUIT060015 — This circuit combines an inverting and non-inverting amplifier to make a reference voltage adjustable from the negative of the input voltage up to the input voltage. Gain can be added to increase the maximum negative reference level.
Features
- Dual +/- 15-V supply
- Input: 10 V
- Output: 0 V to 10 V
Reference designs
TIDM-02000 — This design implements a digitally peak current mode controlled (PCMC) phase shifted full bridge (PSFB) DC-DC converter which converts a 400-V DC input to a regulated 12-V DC output. Novel PCMC waveform generation based on type-4 PWM and internal slope compensation, and simple PCMC implementation (...)
Design files
-
download TIDM-02000 BOM.pdf (473KB) -
download TIDM-02000 Assembly Files.zip (322KB) -
download TIDM-02000 PCB.pdf (13273KB) -
download TIDM-02000 CAD Files.zip (356KB) -
download TIDM-02000 Gerber.zip (1849KB)
TIDM-BIDIR-400-12 — The Bidirectional 400V-12V DC/DC Converter Reference Design is a microcontroller-based implementation of an isolated bi-directional DC-DC converter. A phase shifted full-bridge (PSFB) with synchronous rectification controls power flow from a 400V bus/battery to the 12V battery in step-down (...)
TIDA-00412 — DC-DC power converter with digital control using UCD3138CC64EVM-030 daughter-card. The daughter-card with preloaded firmware providing the required control functions for a Phase Shift Full Bridge converter. The TIDA-00412 (UCD3138PSFBEVM-027) accepts a DC input from 370 to 400 VDC, and (...)
Design files
-
download TIDA-00412 BOM.pdf (75KB) -
download TIDA-00412 PCB.pdf (1826KB)
CAD/CAE symbols
| Package | Pins | Download |
|---|---|---|
| SOIC (D) | 8 | View options |
| SOT-23 (DBV) | 5 | 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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