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ADS1232REF
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User's Guide
SBAU120BNovember 2005 Revised July 2011
ADS1232REF User's Guide
The ADS1232REF is a reference design for the ADS1232 24-bit, delta-sigma analog-to-digital converter
(ADC). It contains all the circuitry and user interface elements needed for a weigh-scale digitizer, and is
meant as an example of good design for a basic weigh-scale system. The ADS1232REF is also suitable
for general evaluation of the ADS1232 device. Additionally, performance results obtained with the
ADS1232REF are applicable to the ADS1234, a device with identical performance.
The ADS1232REF hardware has the following features:
ADS1232 ADC
Connections for load cells or other voltage sources
Low-side excitation switch on the load cell header connector
Ample EMI/RFI suppression between the ADC and rest of design
Eight-digit starburst LCD readout
USB connection for firmware updates and remote control
Designed for very low power consumption
Battery (9V) or wall power
Version 1.1.0 of the firmware includes the following features:
Weigh-scale mode with two-point calibration
Complete configuration of the device
Real-time peak-to-peak and RMS noise calculation
Autoranging voltage display
Noise displayed in volts, codes, and bits
Voltage displayed in volts or codes
Adjustable averaging mode
Raw hexadecimal code display
Simple and fast configuration
Parameters saved to internal flash memory
Computer link
Graphical PC software is also provided for histogram display, datalogging, and device control.
We welcome bug reports and suggestions for additional features; please contact the Texas Instruments
Precision Analog Applications Group.
Hyperterm is a trademark of Microsoft Corporation.
Windows is a registered trademark of Microsoft Corporation.
All other trademarks are the property of their respective owners.
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SBAU120BNovember 2005Revised July 2011 ADS1232REF User's Guide
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