PGA308

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Single Supply, Auto-Zero Sensor Amplifier w/Programmable Gain & Offset

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Product details

Parameters

PGA/VGA PGA Number of channels (#) 2 Vs (Max) (V) 5.5 Vs (Min) (V) 2.7 Slew rate (Typ) (V/us) 0.6 Operating temperature range (C) -40 to 125 open-in-new Find other Programmable & variable gain amplifiers (PGA/VGA)

Package | Pins | Size

VSON (DRK) 10 12 mm² 4 x 3 VSSOP (DGS) 10 9 mm² 3 x 3 VSSOP (DGS) 10 open-in-new Find other Programmable & variable gain amplifiers (PGA/VGA)

Features

  • Digital Calibration for Bridge Sensors
  • Offset Select: Coarse and Fine
  • Gain Select: Coarse and Fine
  • Bridge Fault Monitor
  • Input Mux for Lead Swap
  • Over/Under Scale Limits
  • DOUT/VOUT Clamp Function
  • Seven Banks OTP Memory
  • One-Wire Digital UART Interface
  • Operating Voltage: +2.7V to +5.5V
  • Temperature Range: –40°C to +125°C
  • MSOP-10 and 3mm × 4mm DFN-10 Packages
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Description

The PGA308 is a programmable analog sensor signal conditioner. The analog signal path amplifies the sensor signal and provides digital calibration for offset and gain. Calibration is done via the 1W pin, a digital One-Wire, UART-compatible interface. For three-terminal sensor modules, 1W may be connected to VOUT and the assembly programmed through the VOUT pin. Gain and offset calibration parameters are stored onboard in seven banks of one-time programmable (OTP) memory. The power-on reset (POR) OTP bank may be programmed a total of four times.

The all-analog signal path contains a 2×2 input multiplexer (mux) to allow electronic sensor lead swapping, a coarse offset adjust, an auto-zero programmable gain instrumentation amplifier (PGA), a fine gain adjust, a fine offset adjust, and a programmable gain output amplifier. Fault monitor circuitry detects and signals sensor burnout, overload, and system fault conditions. Over/under-scale limits provide additional means for system level diagnostics. The dual-use DOUT/VCLAMP pin can be used as a programmable digital output or as a VOUT over-voltage clamp.

For detailed application information, see the PGA308 User's Guide (SBOU069) available for download at www.ti.com.

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

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Type Title Date
* Data sheet Single-Supply, Auto-Zero Sensor Amplifier with Programmable Gain and Offset datasheet (Rev. B) Dec. 22, 2010
Application note Multichannel Analog Input Modules for PLC Equipment Jan. 04, 2019
User guide PGA308EVM User's Guide (Rev. A) Sep. 22, 2016
User guide Multi-Cal-System Evaluation Module User's Guide (Rev. B) Sep. 15, 2016
User guide PGA308 User's Guide (Rev. B) Jan. 27, 2012
User guide Multi-Cal-PGA308 System User Guide Apr. 29, 2011
User guide Multi-Cal-Interface User's Guide Sep. 09, 2010
User guide Multi-Cal-Slave User's Guide Sep. 09, 2010
User guide Multi-Cal-Cable User's Guide Sep. 08, 2010
User guide Multi-Cal-Master User's Guide Aug. 22, 2010
User guide Multi-Cal-Test Users Guide Aug. 22, 2010
User guide tioScript Editor Users Guide Aug. 26, 2008
User guide USB DAQ Platform User's Guide Mar. 20, 2008

Design & development

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

Hardware development

EVALUATION BOARD Download
document-generic User guide
2499
Description

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 (...)

Features
  • 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.
EVALUATION BOARD Download
document-generic User guide
199
Description

The PGA308EVM key hardware consists of two boards, PGA308 Test Board and USB DAQ Platform. The PGA308 Test Board contains the PGA308, terminal strips for external connections, several jumpers for device configuration, and support circuitry. The PGA308 Test Board can be used to fully test your design (...)

Features
  • Flexible hardware allows for full testing of prototype
  • EVM Hardware generates and measures all required signals
  • Software for sensor calibration provided
  • Connections for external sensor provided
  • Sensor emulator allows out-of-the-box testing

 

Software development

GUI FOR EVALUATION MODULE (EVM) Download
SBFC032.ZIP (82446 KB)
GUI FOR EVALUATION MODULE (EVM) Download
SBFC033.ZIP (208531 KB)
GUI FOR EVALUATION MODULE (EVM) Download
SBFC034.ZIP (84790 KB)
GUI FOR EVALUATION MODULE (EVM) Download
SBFC035.ZIP (60983 KB)
SUPPORT SOFTWARE Download
SBOC256B.ZIP (15532 KB)
SUPPORT SOFTWARE Download
SBOC257B.ZIP (3859 KB)
SUPPORT SOFTWARE Download
SBOC390.ZIP (260717 KB)
SUPPORT SOFTWARE Download
SBOC391.ZIP (7616 KB)

Design tools & simulation

SIMULATION TOOL Download
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 (...)
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
  • (...)
SIMULATION TOOL Download
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
SCHEMATIC Download
SBOR004.PDF (45 KB)
SCHEMATIC Download
SBOR011.ZIP (585 KB)
SCHEMATIC Download
SBOR015.PDF (535 KB)

CAD/CAE symbols

Package Pins Download
VSON (DRK) 10 View options
VSSOP (DGS) 10 View options

Ordering & quality

Information included:
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  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

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