Datasheet

DAC0830, DAC0832
SNAS534B –MAY 1999–REVISED MARCH 2013 www.ti.com
Gain and Linearity Error Variation
vs.
Temperature
Figure 29.
Miscellaneous Application Hints
These converters are CMOS products and reasonable care should be exercised in handling them to prevent
catastrophic failures due to static discharge.
Conversion accuracy is only as good as the applied reference voltage so providing a stable source over time and
temperature changes is an important factor to consider.
A “good” ground is most desirable. A single point ground distribution technique for analog signals and supply
returns keeps other devices in a system from affecting the output of the DACs.
During power-up supply voltage sequencing, the −15V (or −12V) supply of the op amp may appear first. This will
cause the output of the op amp to bias near the negative supply potential. No harm is done to the DAC, however,
as the on-chip 15 kΩ feedback resistor sufficiently limits the current flow from I
OUT1
when this lead is internally
clamped to one diode drop below ground.
Careful circuit construction with minimization of lead lengths around the analog circuitry, is a primary concern.
Good high frequency supply decoupling will aid in preventing inadvertant noise from appearing on the analog
output.
Overall noise reduction and reference stability is of particular concern when using the higher accuracy versions,
the DAC0830 and DAC0831, or their advantages are wasted.
GENERAL APPLICATION IDEAS
The connections for the control pins of the digital input registers are purposely omitted. Any of the control formats
discussed in Digital Considerations of the accompanying text will work with any of the circuits shown. The
method used depends on the overall system provisions and requirements.
The digital input code is referred to as D and represents the decimal equivalent value of the 8-bit binary input, for
example:
Binary Input D
Pin 13 Pin 7 Decimal
MSB LSB Equivalent
1 1 1 1 1 1 1 1 255
1 0 0 0 0 0 0 0 128
0 0 0 1 0 0 0 0 16
0 0 0 0 0 0 1 0 2
0 0 0 0 0 0 0 0 0
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