XRD5412AIP datasheet(10/16 Pages) EXAR

Part #	XRD5412AIP

Description	5V, Low Power, Voltage Output Serial 8/10/12-Bit DAC Family

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Manufacturer	EXAR [Exar Corporation]

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XRD5408/10/12

10

Rev. 1.20

port also has 4mA driving capability for greater fan-out

when daisy-chaning to other digital inputs.

Monotonicity

The XRD5408/10/12 family of DACs are monotonic over

the entire temperature range.

Micro-Power Operation

The XRD5408 is the lowest power in their class. The

quiescent current rating does not include the reference

ladder current. Power can be saved when the part is not in

use by setting the DAC code to all “0”s assuming the

output load is referenced to ground. This minimizes the

DAC output load current. An analog switch placed in

series with the reference ladder can toggle the reference

voltage off when the circuit is inactive to minimize power

consumption.

Power Supply and Grounding

Best parametric results are obtained by powering the

XRD5408/10/12 family of DACs from an analog +5V

power supply and analog ground. Digital power supplies

and grounds should be separated or connected to the

analog supplies and grounds only at the low-impedance

power-supply source. This is best accomplished on a

multilayer PCB with dedicated planes to ground and

power. The DACs should be locally bypassed with both

0.1 F and 2.2 F capacitors mounted as close as possible

to the power supply pin (VDD). Surface mount ceramic

capacitors are recommended for low impedance, wide

band power supply bypass. If only one +5V power supply

is available for both analog and digital circuity isolate the

analog power supply to the XRD5408/10/12 DAC with an

inductor or ferrite bead before the local bypass

capacitors.

PERFORMANCE CHARACTERISTICS

Figure 8. XRD5408 INL

Figure 9. XRD5408 DNL

CODE

--0.2

0

0.2

0.4

0

64

128

192

--0.1

0.0

0.2

0.35

255

0

64

128

192

255

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