CDB5451 Cirrus Logic Inc, CDB5451 Datasheet - Page 16

• Manufacturer Part Number: CDB5451
• Description: Development Kit
• Manufacturer: Cirrus Logic Inc

Specifications of CDB5451

• Silicon Manufacturer: Cirrus Logic
• Application Sub Type: ADC
• Kit Application Type: Data Converter
• Silicon Core Number: CS5451
• Features: RS-232 Serial Communication With PC, Noise Histogram Analysis, FFT Analysis
• Kit Contents: Evaluation Board And Software
• Rohs Compliant: No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

(from both channels) and it will update the on-
screen results of both channels after calculating the
results on each successive set of 4000 samples.
The results that are displayed on this screen are
therefore updated after each computation cycle.
Note that the results in the very first computation
cycle (after the “START” button has been activat-
ed) will not be valid. Accuracy of the Mean, Std.
Dev. and RMS results will increase as the “Sam-
ples to Average” value is increased.
The user should understand how to interpret the
values that are displayed in the array of number
boxes in the Conversion Window. For CDB5471,
only the results displayed in the “Voltage 1” and
“Current 1” rows are valid. The result values
16
Figure 5. Conversion Window
that are displayed in these numeric output boxes are
all expressed on a normalized scale. The highest
value (0.999...) represents the highest digital output
code that can be issued from the CS5471 (which is
+32767), while the lowest value -0.999... repre-
sents the most negative output code that can be is-
sued from the CS5471 (which is -32768). This is
because the CS5471 issues instantaneous output
codes as two’s complement 16-bit words. There-
fore, the range of values that can be returned from
the CS5471 are between -32768 and +32767. The
CS5471 issues instantaneous data, and every com-
putation cycle, the software computes/displays the
quantities which are described below:
CDB5471
DS480DB1