User
'
s Guide
SBAU120B
–
November 2005
–
Revised July 2011
ADS1232REF User
'
s Guide
The ADS1232REF is a reference design for the
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
, 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.
1
SBAU120B
–
November 2005
–
Revised July 2011
ADS1232REF User
'
s Guide
Copyright
©
2005
–
2011, Texas Instruments Incorporated