AD5301 Ver la hoja de datos (PDF) - Analog Devices

Número de pieza

componentes Descripción

Fabricante

AD5301

2.5 V to 5.5 V, 120 μ
A, 2-Wire Interface, Voltage Output 8-/10-/12-Bit DACs

Analog Devices 

AD5301/AD5311/AD5321

TERMINOLOGY

Relative Accuracy

For the DAC, relative accuracy or integral nonlinearity (INL)

is a measure of the maximum deviation, in LSBs, from a

straight line passing through the actual endpoints of the DAC

transfer function. Typical INL vs. code plots can be seen in

Figures 2 to 4.

Differential Nonlinearity

Differential nonlinearity (DNL) is the difference between the

measured change and the ideal 1 LSB change between any two

adjacent codes. A specified differential nonlinearity of ± 1 LSB

maximum ensures monotonicity. These DACs are guaranteed

monotonic by design over all codes. Typical DNL vs. code plots

can be seen in Figures 5 to 7.

Zero-Code Error

Zero-code error is a measure of the output error when zero code

(00H) is loaded to the DAC register. Ideally, the output should

be 0 V. The zero-code error of the AD5301/AD5311/AD5321 is

always positive because the output of the DAC cannot go below

0 V. It is due to a combination of the offset errors in the DAC

and output amplifier. It is expressed in mV, see Figure 9.

Full-Scale Error

Full-scale error is a measure of the output error when full scale

is loaded to the DAC register. Ideally, the output should be

VDD – 1 LSB. Full-scale error is expressed in percent of FSR

(full-scale range). A plot can be seen in Figure 9.

Gain Error

This is a measure of the span error of the DAC. It is the devia-

tion in slope of the actual DAC transfer characteristic from the

ideal expressed as a percentage of the full-scale range.

Zero-Code Error Drift

This is a measure of the change in zero-code error with a

change in temperature. It is expressed in µV/°C.

Gain Error Drift

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

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

Major Code Transition Glitch Energy

Major code transition glitch energy is the energy of the impulse

injected into the analog output when the code in the DAC regis-

ter 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 but is measured when the DAC is not being written to. It

is specified in nV-s and is measured with a full-scale change on

the digital input pins, i.e., from all 0s to all 1s and vice versa.

–6–

REV. A

Share Link: