Precision, Low Drift, CMOS Instrumentation Amplifier
Product details
Parameters
Package | Pins | Size
Features
- PRECISION
LOW OFFSET: 100 µV (max)
LOW OFFSET DRIFT: 0.4 µV/°C (max)
EXCELLENT LONG-TERM STABILITY
VERY-LOW 1/f NOISE - TRUE RAIL-TO-RAIL I/O
INPUT COMMON-MODE RANGE:
20mV Below Negative Rail to 100mV Above Positive Rail
WIDE OUTPUT SWING: Within 10mV of Rails
SUPPLY RANGE: Single +2.7V to +5.5V - SMALL SIZE
microPACKAGE: MSOP-8, MSOP-10 - LOW COST
- APPLICATIONS
- LOW-LEVEL TRANSDUCER AMPLIFIER FOR BRIDGES, LOAD CELLS, THERMOCOUPLES
- WIDE DYNAMIC RANGE SENSOR MEASUREMENTS
- HIGH-RESOLUTION TEST SYSTEMS
- WEIGH SCALES
- MULTI-CHANNEL DATA ACQUISITION SYSTEMS
- MEDICAL INSTRUMENTATION
- GENERAL-PURPOSE
Description
The INA326 and INA327 (with shutdown) are high-performance, low-cost, precision instrumentation amplifiers with rail-to-rail input and output. They are true single-supply instrumentation amplifiers with very low DC errors and input common-mode ranges that extends beyond the positive and negative rails. These features make them suitable for applications ranging from general-purpose to high-accuracy.
Excellent long-term stability and very low 1/f noise assure low offset voltage and drift throughout the life of the product.
The INA326 (without shutdown) comes in the MSOP-8 package. The INA327 (with shutdown) is offered in an MSOP-10. Both are specified over the industrial temperature range, 40°C to +85°C, with operation from 40°C to +125°C.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | INA326, 327: Precision, Rail-To-Rail I/O Instrumentation Amplifier datasheet (Rev. D) | Nov. 03, 2004 |
Technical articles | What is an instrumentation amplifier? | Aug. 09, 2019 | |
Application note | 3-decade, load-current sensing circuit (Rev. A) | Feb. 01, 2019 | |
Application note | Low-level voltage-to-current converter circuit | Jan. 09, 2019 | |
E-book | The Signal e-book: A compendium of blog posts on op amp design topics | Mar. 28, 2017 | |
Technical articles | How to layout a PCB for an instrumentation amplifier | Oct. 14, 2016 | |
Technical articles | Dealing with rejection: Instrumentation amplifier PSRR and CMRR (Part I) | Nov. 25, 2013 | |
Application note | A dual-polarity, bidirectional current-shunt monitor | Oct. 22, 2008 | |
Application note | Q4 2008 Issue Analog Applications Journal | Oct. 22, 2008 | |
Application note | Low-Cost Noise-Immune Isolated Thermocouple Signal Processor | Jan. 08, 2007 | |
Application note | Getting the most out of your instrumentation amplifier design | Oct. 10, 2005 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
PLABS-SAR-EVM-PDK is an experimental platform used in conjunction with TI Precision Labs videos to gain a deeper understanding of successive approximation register (SAR) analog-to-digital converter (ADC) circuits. The evaluation module (EVM) platform contains two channels for common SAR (...)
Features
- Intuitive setup – PCB overlay shows the schematic
- No external power supply required
- Includes several coupon boards with different driving amplifier RC filters to facilitate experimentation
- Ships with PHI controller - provides convenient interface to EVM over USB 2.0 (or higher) for power delivery (...)
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
- (...)
The Common-Mode Input Range Calculator is pre-loaded (...)
Features
- Preloaded with 20 of TI’s most popular instrumentation amplifier specifications
- Customizable supply, gain, and voltage reference options
- Calculator displays output limitations graphically and numerically
Reference designs
Design files
-
download TIPD193 BOM.pdf (203KB)
Design files
-
download TIPD107 Gerber.zip (161KB) -
download TIPD107 BOM (Rev. A).pdf (185KB)
Design files
-
download TIPD104 BOM.pdf (186KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
VSSOP (DGK) | 8 | 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
TI E2E™ forums with technical support from TI engineers
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