PGA900

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Programmable resistive sensing conditioner with digital and analog outputs

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Product details

Parameters

Operating temperature range (C) -40 to 150 Vs (Min) (V) 3.3 Vs (Max) (V) 30 Interface type SPI, UART, I2C, PWM, OWI, Ratiometric Analog Voltage, 4-20mA Resolution (Bits) 24 Rating Catalog open-in-new Find other Signal conditioners

Package | Pins | Size

DSBGA (YZS) 36 0 mm² 3.63 x 3.755 VQFN (RHH) 36 36 mm² 6 x 6 open-in-new Find other Signal conditioners

Features

  • High accuracy, low noise, low power, small size resistive sensing signal conditioner
  • User-programmable temperature and nonlinearity compensation
  • On-chip ARM® Cortex® M0 microprocessor allows users to develop and implement calibration software
  • One-wire interface enables the communication through power supply pin without using additional lines
  • On-chip power management accepts wide power supply voltage from 3.3 V to 30 V
  • Operating temperature range: –40°C to +150°C
  • Memory:
    • 8-kB software memory
    • 128 bytes EEPROM
    • 1-kB data SRAM
  • Accommodates sensor sensitivities from 1 mV/V to 135 mV/V
  • Two individual analog-front end (AFE) chains, each including:
    • Low-noise programmable gain amplifier
    • 24-bit sigma-delta analog-to-digital converter
  • Built-in internal temperature sensor with option to use external temperature sensor
  • 14-bit DAC with programmable gain amplifier
  • Output options:
    • Ratiometric and absolute voltage output
    • 4- to 20-mA current loop interface
    • One-wire interface (OWI) over power line
    • PWM output
    • Serial peripheral interface (SPI)
    • Inter-integrated circuit (I2C)
  • Depletion MOSFET gate driver
  • Diagnostic functions

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Description

The PGA900 is a signal conditioner for resistive sensing applications. It can accommodate various sensing element types. The PGA900 conditions its input signals by amplification and digitization through two analog front end channels. With the user programmed software in the on-chip ARM Cortex M0 processor, the PGA900 can perform linearization, temperature compensation, and other user defined compensation algorithms. The conditioned signal can be output as ratiometric voltage, absolute voltage, 4- to 20-mA current loop or PWM. The data and configuration registers can also be accessed through SPI, I2C, UART, and two GPIO ports. In addition, the unique OWI allows communication and configuration through the power supply pin without using additional lines. The PGA900 operating voltage is from 3.3 V to 30 V and it can operate in temperatures from –40°C to +150°C.

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More information

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Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet PGA900 Programmable Resistive Sensing Conditioner With Digital and Analog Outputs datasheet Apr. 15, 2019
Application note Connecting PGA900 Instrumentation Amplifier to Resistive Bridge Sensor (Rev. A) May 23, 2019
White paper Cities grow smarter through innovative semiconductor technologies Jul. 07, 2017
Application note PGA900, PGA300 and PGA305 Use Case for HVAC Applications May 02, 2017
Application note PGA900, PGA300 and PGA305 Use Case for the Pressure Transmitter Applications May 02, 2017
Application note PGA900, PGA300 and PGA305 Use Case for Weight Scale (Load Cell) Applications May 01, 2017
Application note Ratiometric measurement in the context of LVDT-sensor signal conditioning Jul. 21, 2016
Technical articles 2015: A year of innovation Dec. 17, 2015
Technical articles Jack Kilby’s innovative spirit embodied in our 2015 Modern Day Jacks Sep. 10, 2015
Application note Analog Applications Journal 3Q 2015 Jul. 24, 2015
Application note Design tips for a resistive-bridge pressure sensor in industrial process-control Jul. 24, 2015
Application note System Noise Analysis of a Resistive Bridge Pressure Sensor Connected to the PGA Jul. 07, 2015
Technical articles A small and innovative solution for big machinery Jun. 25, 2015
Application note Understanding Open Loop Output Impedance of the PGA900 DAC Gain Amplifier (Rev. A) May 19, 2015
Application note PGA900 as 4- to 20-mA Current Loop Transmitter May 07, 2015
Application note Understanding Open Loop Gain of the PGA900 DAC Gain Amplifier Apr. 02, 2015
Application note PGA900 DAC Output Stability Application Note Mar. 04, 2015
Technical articles Get Connected: A new blog series Jan. 10, 2014

Design & development

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

Hardware development

EVALUATION BOARD Download
249
Description
The PGA900 evaluation module (EVM) evaluates all the features of the PGA900 in either voltage mode or current mode. PGA900EVM has a resistive bridge on board with a potentiometer allowing for differential input voltages to be adjusted by the user to emulate a pressure sense element. PGA900EVM also (...)
Features
  • Current-mode evaluation
  • Voltage-mode evaluation
  • XDS200 SWD interface
  • OWI circuitry
  • Circuit design is tested and includes GUI and getting-started guide

Design tools & simulation

SIMULATION MODEL Download
SLDM004.ZIP (167 KB) - PSpice Model
SIMULATION MODEL Download
SLDM005.TSC (652 KB) - TINA-TI Reference Design
SIMULATION MODEL Download
SLDM006.ZIP (5 KB) - TINA-TI Spice Model
SIMULATION MODEL Download
SLDM007.TSC (509 KB) - TINA-TI Reference Design

Reference designs

REFERENCE DESIGNS Download
Single-Chip, loop-powered 4-20mA RTD Sensor Transmitter Reference Design
TIDA-00851 The TIDA-00851 reference design is a single-chip solution for a 2-wire, 4-20mA loop-powered system including a 4-wire RTD analog front-end. The built-in processor enables the usage of compensation algorithms, increasing the system performance. The design is ideally suited for space constraints (...)
document-generic Schematic

CAD/CAE symbols

Package Pins Download
DSBGA (YZS) 36 View options
VQFN (RHH) 36 View options

Ordering & quality

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  • Qualification summary
  • Ongoing reliability monitoring

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