Support software
Data sheet
PGA309
- 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
- APPLICATIONS
- 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.
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 www.ti.com.
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Technical documentation
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View all 18 Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Evaluation board
MULTI-CAL-SYSTEM — Multi-Cal-System Basic Starter Kit
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 (...)
User guide: PDF
Evaluation board
PGA309EVM-USB — PGA309 Evaluation Module
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 (...)
User guide: PDF
Evaluation board
SENSOREMULATOREVM — SensorEmulatorEVM Evaluation Module
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 (...)
Support software
SBOC394 — PGA309EVM-USB Source Code
Supported products & hardware
Products
Programmable & variable gain amplifiers (PGAs & VGAs)
Hardware development
Evaluation board
Support software
SBOC401 — Multi-Cal-PGA309 System Software
Supported products & hardware
Products
Programmable & variable gain amplifiers (PGAs & VGAs)
Hardware development
Evaluation board
Calculation tool
SBOC065 — Generate Simulated Values
Supported products & hardware
Products
Programmable & variable gain amplifiers (PGAs & VGAs)
Hardware development
Evaluation board
Simulation tool
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
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 (...)
Simulation tool
TINA-TI — SPICE-based analog simulation program
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 (...)
User guide: PDF
Reference designs
TIPD126 — Bridge sensor signal conditioner with current loop output and EMC protection reference design
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 (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| TSSOP (PW) | 16 | Ultra Librarian |
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