AD5664ARMZ datasheet(14/23 Pages) AD

14 / 23 page

AD5624/AD5664

Data Sheet

Rev. A | Page 14 of 23

Digital Crosstalk

This is the glitch impulse transferred to the output of one DAC

at midscale in response to a full-scale code change (all 0s to all

1s and vice versa) in the input register of another DAC. It is

measured in standalone mode and is expressed in nV-s.

Analog Crosstalk

This is the glitch impulse transferred to the output of one DAC

due to a change in the output of another DAC. It is measured by

loading one of the input registers with a full-scale code change

(all 0s to all 1s and vice versa). Then execute a software LDAC

and monitor the output of the DAC whose digital code was

not changed. The area of the glitch is expressed in nV-s (see

Figure 24).

DAC-to-DAC Crosstalk

This is the glitch impulse transferred to the output of one DAC

due to a digital code change and subsequent analog output change

of another DAC. It is measured by loading the attack channel

with a full-scale code change (all 0s to all 1s and vice versa) using

the command write to and update while monitoring the output of

the victim channel that is at midscale. The energy of the glitch is

expressed in nV-s.

Multiplying Bandwidth

The amplifiers within the DAC have a finite bandwidth. The

multiplying bandwidth is a measure of this. A sine wave on the

reference (with full-scale code loaded to the DAC) appears on

the output. The multiplying bandwidth is the frequency at which

the output amplitude falls to 3 dB below the input.

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