Product category:
Analogue and Mixed Signal ICs
News Release from: Texas Instruments (April 2001-March 2006) | Subject: PGA309
Edited by the Electronicstalk Editorial
Team on 27 January 2004
All-in signal conditioning for pressure
sensors
A novel digitally programmable analogue signal conditioner is designed for use with pressure bridge sensors.
A novel digitally programmable analogue signal conditioner is designed for use with pressure bridge sensors This highly integrated, voltage-output integrated circuit (IC) provides amplification, digital calibration and error compensation that enables system performance approaching the inherent sensor repeatability
This article was originally published on Electronicstalk on 8 Nov 2004 at 8.00am (UK)
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"The PGA309 offers bridge sensor customers an off-the-shelf signal conditioner, with digital calibration, that will solve the problem of conditioning nonlinear sensors over a wide temperature range", said Tim Green, Strategic Marketing Engineer for TI's high-performance linear products.
"An integral part of the PGA309 solution is an easy-to-use designer's kit (PGA309DK) which gives the customer a quick start.
With this tool, a designer can evaluate and calibrate their sensor over temperature".
The PGA309 amplifies a low level bridge sensor signal and provides digital calibration for sensor zero, zero drift, span, span drift and linearity errors with applied pressure.
The calibration is performed via a one- or two-wire serial interface.
Calibration parameters - up to 17 different temperature calibration points with linear interpolation - are stored in an external nonvolatile memory (typically a low-cost, SOT23-5 EEPROM).
This eliminates manual trimming and assures long-term stability.
The PGA309 consists of amplification signal path (low-noise, low-drift, auto-zero programmable gain instrumentation amplifier), offset and offset drift adjustment, span and span drift adjustment, integrated temperature sensor, voltage reference, bridge excitation and linearisation, sensor fault detection, power-on reset and digital interface.
The PGA309 features a wide operating temperature range (-40 to +125C), internal/external temperature sense select, over/under limit scaling, internal/external reference selection and +2.7 to +5.5V supply operation.
The PGA309 is available now from TI and its authorised distributors.
The device is packaged in a TSSOP-16 and is priced from $2.95 in 1000-piece quantities (suggested resale price).
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