PGA309 Voltage Output Programmable Sensor Conditioner


Product details


PGA/VGA PGA Number of channels (#) 2 Vs (Max) (V) 5 Vs (Min) (V) 2.7 Slew rate (Typ) (V/us) 0.5 Operating temperature range (C) -40 to 125 open-in-new Find other Programmable & variable gain amplifiers (PGA/VGA)

Package | Pins | Size

TSSOP (PW) 16 22 mm² 5 x 4.4 open-in-new Find other Programmable & variable gain amplifiers (PGA/VGA)


  • Complete Bridge Sensor Conditioner
  • Voltage Output: Ratiometric or Absolute
  • Digital Cal: No Potentiometers/Sensor Trims
  • Sensor Error Compensation
    • Span, Offset, and Temperature Drifts
  • Low Error, Time-Stable
  • Sensor Linearization Circuitry
  • Temperature Sense: Internal or External
  • Calibration Lookup Table Logic
    • Uses External EEPROM (SOT23-5)
  • Over/Under-Scale Limiting
  • Sensor Fault Detection
  • +2.7V TO +5.5V Operation
  • –40°C to +125°C Operation
  • Small TSSOP-16 Package
    • Bridge Sensors
    • Remote 4-20mA Transmitters
    • Strain, Load, and Weigh Scales
    • Automotive Sensors
    • Hardware Designer’s Kit (PGA309EVM)
      • Temperature Eval of PGA309 + Sensor
      • Full Programming of PGA309
      • Sensor Compensation Analysis Tool
  • All other trademarks are the property of their respective owners.

    open-in-new Find other Programmable & variable gain amplifiers (PGA/VGA)


    The PGA309 is a programmable analog signal conditioner designed for bridge sensors. The analog signal path amplifies the sensor signal and provides digital calibration for zero, span, zero drift, span drift, and sensor linearization errors with applied stress (pressure, strain, etc.). The calibration is done via a One-Wire digital serial interface or through a Two-Wire industry-standard connection. The calibration parameters are stored in external nonvolatile memory (typically SOT23-5) to eliminate manual trimming and achieve long-term stability.

    The all-analog signal path contains a 2x2 input multiplexer (mux), auto-zero programmable-gain instrumentation amplifier, linearization circuit, voltage reference, internal oscillator, control logic, and an output amplifier. Programmable level shifting compensates for sensor dc offsets.

    The core of the PGA309 is the precision, low-drift, no 1/f noise Front-End PGA (Programmable Gain Amplifier). The overall gain of the Front-End PGA + Output Amplifier can be adjusted from 2.7V/V to 1152V/V. The polarity of the inputs can be switched through the input mux to accommodate sensors with unknown polarity output. The Fault Monitor circuit detects and signals sensor burnout, overload, and system fault conditions.

    For detailed application information, see the PGA309 User's Guide (SBOU024) available for download at

    open-in-new Find other Programmable & variable gain amplifiers (PGA/VGA)

    Technical documentation

    star = Top documentation for this product selected by TI
    No results found. Please clear your search and try again.
    View all 19
    Type Title Date
    * Data sheet Voltage Output Programmable Sensor Conditioner datasheet (Rev. C) Jan. 14, 2011
    * User guide PGA309 User's Guide (Rev. B) Jan. 13, 2011
    Application note How to Select Amplifiers for Pressure Transmitter Applications (Rev. A) Jul. 27, 2021
    Application note Multichannel Analog Input Modules for PLC Equipment Jan. 04, 2019
    User guide Multi-Cal-System Evaluation Module User's Guide (Rev. B) Sep. 15, 2016
    User guide PGA309EVM-USB User Guide (Rev. B) Aug. 31, 2016
    Application note Ratiometric measurement in the context of LVDT-sensor signal conditioning Jul. 21, 2016
    Technical article Industrial DACs: How to protect 2-wire transmitters Feb. 20, 2015
    Application note 4Q 2011 Issue Analog Applications Journal Nov. 09, 2011
    Application note Analog linearization of resistance temperature detectors Nov. 09, 2011
    User guide Multi-Cal-PGA309 System User Guide Apr. 27, 2011
    User guide Multi-Cal-Master User's Guide Aug. 22, 2010
    User guide Multi-Cal-Test Users Guide Aug. 22, 2010
    Application note Using the XTR115 with the PGA309 to Generate 4mA to 20mA Output (Rev. B) Apr. 20, 2006
    Application note PGA309 Quick Start System Reference Guide (Rev. C) Jan. 13, 2006
    Application note PGA309 Noise Filtering (Rev. A) Nov. 28, 2005
    Application note Practical Technique for Minimizing the Number of Measurements in Sensor Signal Jun. 28, 2005
    Application note PGA309 Microcontroller Application Jun. 07, 2005
    User guide Using PGA309 for Sensor Compensation Mar. 11, 2004

    Design & development

    For additional terms or required resources, click any title below to view the detail page where available.

    Hardware development

    document-generic User guide

    The Multi-Cal-System is a system of evaluation modules and accessories that can be used to calibrate multiple PGA308 sensor modules. The Multi-Cal-System can be configured to calibrate from 8 to 64 PGA308s simultaneously. The key component of the Multi-Cal-System is the Multi-Cal-System Starter Kit (...)

    • High accuracy
    • Scalable - Upgrades add 8 channels at a time.
    • Simultaneous calibration of up to 64 PGA308's.
    • Low cost compared to other similar systems
    • Flexible - Purchase just the components you need.
    • Easily modified for your application.
    PGA309 Evaluation Module
    document-generic User guide

    The PGA309EVM-USB key hardware consists of two boards, PGA309 Test Board and USB DAQ Platform. The PGA309 Test Board contains the PGA309, terminal strips for external connections, several jumpers for device configuration, and support circuitry. The PGA309 Test Board can be used to fully test your (...)


    The SensorEmulatorEVM provides a complete system for strain and temperature emulation of voltage-excited bridge sensors. The SensorEmulatorEVM uses rotary selector switches and potentiometers to emulate the operation of a voltage-excited Wheatstone resistive bridge sensor at discrete operating (...)

    • Complete Strain and Temperature Emulation of Voltage-Excited Bridge Sensors
    • Simplifies Development of Voltage-Excitation Bridge Sensor Signal Conditioning Systems
    • Provides 11 Different Emulated Sensor Output Conditions
      • Cold Temperature: 0%, 50%, 100%
      • Room Temperature: 0%, 25%, 50%, 75%, 100%
      • Hot (...)

    Software development

    SBOC320C.ZIP (110347 KB)
    SBOC394A.ZIP (5216 KB)
    SBOC401A.ZIP (257852 KB)

    Design tools & simulation

    PSpice® for TI design and simulation tool
    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 (...)
    • 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
    • (...)
    SPICE-based analog simulation program
    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 (...)
    document-generic User guide
    SBOC132.ZIP (130 KB)
    SLVC073D.ZIP (2463 KB)
    SCHEMATIC Download
    SBOR010.PDF (44 KB)
    SCHEMATIC Download
    SBOR011.ZIP (585 KB)
    SCHEMATIC Download
    SBOR015.PDF (535 KB)

    Reference designs

    Bridge Sensor Signal Conditioner with Current Loop Output, EMC Protection
    TIPD126 This bridge sensor conditioner module delivers a well-regulated current output to a ground-referenced load. The first stage uses a mixed-signal programmable gain amplifier (PGA) to provide linearization and temperature compensation to a differential bridge sensor voltage. The second stage converts (...)
    document-generic Schematic document-generic User guide

    CAD/CAE symbols

    Package Pins Download
    TSSOP (PW) 16 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

    TI E2E™ forums with technical support from TI engineers

    Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

    If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​