DAC8734_091 Datasheet, PDF (30/41 Pages) Texas Instruments – Quad, 16-Bit, High-Accuracy, ±16V Output, Serial Input DIGITAL-TO-ANALOG CONVERTER

DAC8734
SBAS465A – MAY 2009 – REVISED SEPTEMBER 2009 .................................................................................................................................................. www.ti.com
USER ZERO- AND GAIN-CALIBRATION
The DAC8734 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 DAC8734 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 DAC8734 in
unipolar output and bipolar output configurations, respectively.
1LSB
Gain ´ V_REF
+ Full Scale
Gain Adjust
Rotates the
Transfer
Function
Input =
0000h
Input =
FFFFh
Zero Scale
Digital Input
Zero Adjust Translates the Transfer Function
Figure 45. Relationship of Zero and Gain Calibration for a Unipolar Output Configuration
+ Full-
Scale
Input = 8000h
0.5 ´ Gain ´ V_REF
1LSB
Gain Adjust
Rotates the
Transfer
Function
Input = 7FFFh
Zero Adjust
Translates the
Transfer Function
Input = 0000h
- Full-Scale
-0.5 ´ Gain ´ V_REF
Digital Input
Figure 46. Relationship of Zero and Gain Calibration for a Bipolar Output Configuration
30
Submit Documentation Feedback
Product Folder Link(s): DAC8734
Copyright © 2009, Texas Instruments Incorporated