AD5763CSUZ(RevC) View Datasheet(PDF) - Analog Devices

Part Name

Description

Manufacturer

AD5763CSUZ
(Rev.:RevC)

Complete Dual, 16-Bit High Accuracy, Serial Input, ±5 V DAC

Analog Devices 

Data Sheet

AD5763

Initial accuracy error on the output voltage of an external refer-

ence could lead to a full-scale error in the DAC. Therefore, to

minimize these errors, a reference with a low initial accuracy

error specification is preferred. Choosing a reference with an

output trim adjustment, such as the ADR430, allows a system

designer to trim system errors by setting the reference voltage

to a voltage other than the nominal. The trim adjustment can

also be used at temperatures to trim out any error.

Long-term drift is a measure of how much the reference output

voltage drifts over time. A reference with a tight long-term drift

specification ensures that the overall solution remains relatively

stable over its entire lifetime.

The temperature coefficient of a reference output voltage affects

INL, DNL, and TUE. A reference with a tight temperature coef-

ficient specification should be chosen to reduce the dependence

of the DAC output voltage on ambient conditions.

In high accuracy applications, which have a relatively low noise

budget, reference output voltage noise needs to be considered.

Choosing a reference with as low an output noise voltage as

practical for the system resolution required is important. Precision

voltage references such as the ADR420 (XFET® design) produce

low output noise in the 0.1 Hz to 10 Hz region. However, as the

circuit bandwidth increases, filtering the output of the reference

may be required to minimize the output noise.

Table 20. Precision References Recommended for Use with the AD5763

Part No. Initial Accuracy (mV Max) Long-Term Drift (ppm Typ) Temp Drift (ppm/°C Max)

ADR430 ±1

40

3

ADR420 ±1

50

3

0.1 Hz to 10 Hz Noise (μV p-p Typ)

3.5

1.75

Rev. C | Page 25 of 28

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