AD5330_08 datasheet(12/28 Pages) AD

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AD5330/AD5331/AD5340/AD5341

Rev. A | Page 12 of 28

Offset Error Drift

This is a measure of the change in offset error with changes in

temperature. It is expressed in (ppm of full-scale range)/°C.

Gain Error Drift

This is a measure of the change in gain error with changes in

temperature. It is expressed in (ppm of full-scale range)/°C.

Power-Supply Rejection Ratio (PSRR)

This indicates how the output of the DAC is affected by changes

in the supply voltage. PSRR is the ratio of the change in VOUT to

a change in VDD for full-scale output of the DAC. It is measured

in decibels. VREF is held at 2 V and VDD is varied ±10%.

Reference Feedthrough

This is the ratio of the amplitude of the signal at the DAC

output to the reference input when the DAC output is not being

updated (that is, LDAC is high). It is expressed in decibels.

Major-Code Transition Glitch Energy

Major-code transition glitch energy is the energy of the impulse

injected into the analog output when the DAC changes state. It

is normally specified as the area of the glitch in nV/s and is

measured when the digital code is changed by 1 LSB at the

major carry transition (011 … 11 to 100 … 00 or 100 … 00

to 011 … 11).

Digital Feedthrough

Digital Feedthrough is a measure of the impulse injected into

the analog output of the DAC from the digital input pins of the

device; it is measured when the DAC is not being written to (CS

held high). It is specified in nV/s and is measured with a full-

scale change on the digital input pins, that is, from all 0s to all

1s and vice versa.

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 a 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.

Total Harmonic Distortion (THD)

This is the difference between an ideal sine wave and its atte-

nuated version using the DAC. The sine wave is used as the

reference for the DAC and THD is a measure of the harmonics

present on the DAC output. It is measured in decibels.

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