Datasheet

USER ZERO- AND GAIN-CALIBRATION
DigitalInput
Input=
FFFCh
Input=
0000h
GainAdjust
Rotatesthe
Transfer
Function
1LSB
+FullScale
Full-ScaleRange
AnalogOutput
Gain V´
REF
ZeroScale
ZeroAdjustTranslatestheTransferFunction
DigitalInput
Input=8000h
1LSB
Full-Scale
Range
+Full-
Scale
- Full-Scale
-0.5 Gain ´´ V
REF
Zero Adjust
Translatesthe
TransferFunction
Input=7FFCh
Input=0000h
AnalogOutput
0.5 Gain V´ ´
REF
GainAdjust
Rotatesthe
Transfer
Function
DAC8234
SBAS464A – AUGUST 2009 – REVISED SEPTEMBER 2009 ........................................................................................................................................... www.ti.com
The DAC8234 is trimmed during production for nominal operating conditions to have very low gain error and
offset error. However, to trim the offset and gain errors introduced at other conditions of operation or by other
components in the signal chain, the DAC8234 has a user zero and gain digital calibration feature for each DAC
channel. Figure 45 and Figure 46 illustrate the relationship of zero and gain calibration for the DAC8234 in
unipolar output and bipolar output configurations, respectively.
Figure 45. Relationship of Zero and Gain Calibration for a Unipolar Output Configuration
Figure 46. Relationship of Zero and Gain Calibration for a Bipolar Output Configuration
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Product Folder Link(s): DAC8234