Product Announcement

Product Announcement Introducing PGA309 as Bare Die Product from Texas Instruments
Voltage output Programmable Sensor Conditioner
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 non‐volatile memory 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 through can be adjusted from 2.7V/V to 1152V/V. The polarity of the inputs can be switched
the input mux to accommodate sensors with unknown polarity output. The Fault Monitor circuit detects and signals sensor burnout, overload, and system fault conditions. Designing applications with the PGA309 in bare die form allows the designer to place the device closer to the signal source to reduce noise pickup and increase signal integrity. Bare die form factor greatly assists size sensitive applications. Quick Reference Data SOP
Vs (Min) (V)
2.7
Vs (Max) (V)
5
Features
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CHIP ON BOARD
COMPLETE BRIDGE SENSOR CONDITIONER
FLIP CHIP VOLTAGE OUTPUT: Ratiometric or Absolute
DIGITAL CAL: No Potentiometers/Sensor Trims
Please contact us for the PGA309 die geometry. SENSOR ERROR COMPENSATION
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Span, Offset, and Temperature Drifts
LOW ERROR, TIME STABLE
Applications
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SENSOR LINEARIZATION CIRCUITRY
TEMPERATURE SENSE: Internal or External
OVER/UNDER-SCALE LIMITING
SENSOR FAULT DETECTION
BRIDGE SENSORS
REMOTE 4-20mA TRANSMITTERS
STRAIN, LOAD, AND WEIGH SCALES
AUTOMOTIVE SENSORS
+2.7V TO +5.5V OPERATION
A full electrical datasheet is available from http://focus.ti.com/lit/ds/symlink/pga309.pdf
For further die technical information and choice of available supply formats please contact us Micross Components EU
Micross Components USA
Micross Components Asia
Unit D2 Meadowbank
Oldham, Lancashire
OL9 8EH England
22 Just Road
Fairfield, NJ 07004-3413
USA
299299 Kaiyuan Road
Jiangning, Nanjing
China 211100
www.micross.com
Tel: +44 (0)161 683 5236
Fax: +44 (0)161 684 1233
Tel: (973) 227 8007
Fax: (973) 227 4766
Tel: +86-25-6667 8880
August 2010