AD5340(Rev0) Просмотр технического описания (PDF) - Analog Devices

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AD5340
(Rev.:Rev0)

2.5 V to 5.5 V, 115
A, Parallel Interface Single Voltage-Output 8-/10-/12-Bit DACs

Analog Devices 

AD5330/AD5331/AD5340/AD5341

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 dBs. 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

(i.e., LDAC is high). It is expressed in dBs.

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 secs

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, but is measured when the DAC is not being written to

(CS held high). It is specified in nV secs and is measured with a

full-scale change on the digital input pins, i.e., 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 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

This is the difference between an ideal sine wave and its attenuated

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

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

on the DAC output. It is measured in dBs.

–10–

REV. 0

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