DAC0830, DAC0832

SNAS534B – MAY 1999 – REVISED MARCH 2013

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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 k

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

18

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