Analog Devices ADUC812 Get Started Manual page 20

Sigma Delta WASP
10. The Sigma Delta Acquisition window (as shown below) opens for any of the Sigma Delta
ADC MicroConverter products (ADuC816, ADuC824, ADuC834, ADuC836, ADuC845,
ADuC847 and ADuC848)
From the Acquisition window you can...
a. Select the channel on which you want to convert
b. Set up the ADC Update Rate.
c. Select the number of samples that you want to acquire.
d. Set up voltages on the DAC channels
e. Select the use of the Internal Reference or an External Reference device.
f. Enable/Disable various Analog/Digital Peripherals
Note: Switch Configuration
11.
Make sure that the external reference (2.5v REF+) is connected (S1.6 ON), for
ADuC845/847 (S4.5 ON), and that AIN2 is biased to 2.5V (S1.7 ON), for ADuC845/847
read AINCOM for Ain2 and ensure AINCOM is biased to 2.5V (S4.7 ON). Also ensure that
REF- is grounded (S1.5 ON), ADuC845/847 (S4.4 ON). All Other connections should be
OFF.
By default the WASP enables the Primary ADC configured as below (i.e. Primary ADC
converting in bipolar mode using an external reference on the 2.56V range with internally
shorted inputs Ain2
DAC and Current sources are all disabled). Note: Aux ADC and DAC are not available on
ADuC847. Press the RUN button to send this default configuration to the MicroConverter
device and begin the conversions. The screen changes to configure for a single Primary ADC
acquisition sequence. The results of conversion are displayed in real time. Because the
channel is configured for an internal short then we can expect ADC conversions close to
80000h. The WASP performs 500 ADC conversions by default and displays the conversion
results. The following plots show typical 24bit results.
REV 1.3
Ain2 (ADuC845/847 AINCOM
-- 20 --
ADuC8XX GetStarted Guide
AINCOM). The Auxiliary ADC,
(5.0) The ADuC WASP
www.analog.com/microconverter