AD5347BRU-REEL

更新时间： 2024-01-15 23:26:46

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
24页	1184K
描述
2.5 V to 5.5 V, Parallel Interface 2.5 V to 5.5 V, Parallel Interface

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AD5347BRU-REEL 数据手册

AD5346/AD5347/AD5348

TERMINOLOGY

Relative Accuracy

GAIN ERROR

AND

OFFSET

ERROR

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 versus code plots can be seen in Figure 14,

Figure 15, and Figure 16.

ACTUAL

OUTPUT

VOLTAGE

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. This DAC is guaranteed

monotonic by design. Typical DNL versus code plots can be

seen in Figure 17, Figure 18, and Figure 19.

IDEAL

POSITIVE

OFFSET

Gain Error

DAC CODE

This is a measure of the span error of the DAC, including any

error in the gain of the buffer amplifier. It is the deviation in

slope of the actual DAC transfer characteristic from the ideal

and is expressed as a percentage of the full-scale range. This is

illustrated in Figure 11.

Figure 12. Positive Offset Error and Gain Error

GAIN ERROR

AND

OFFSET

ERROR

Offset Error

IDEAL

This is a measure of the offset error of the DAC and the output

amplifier. It is expressed as a percentage of the full-scale range.

OUTPUT

VOLTAGE

If the offset voltage is positive, the output voltage still positive at

zero input code. This is shown in Figure 12. Because the DACs

operate from a single supply, a negative offset cannot appear at

the output of the buffer amplifier. Instead, there is a code close

to zero at which the amplifier output saturates (amplifier

footroom). Below this code there is a dead band over which the

output voltage does not change. This is illustrated in Figure 13.

ACTUAL

NEGATIVE

OFFSET

DAC CODE

POSITIVE

GAIN ERROR

DEADBAND CODES

AMPLIFIER

FOOTROOM

(~1mV)

NEGATIVE

ACTUAL

GAIN ERROR

OUTPUT

VOLTAGE

NEGATIVE

OFFSET

IDEAL

Figure 13. Negative Offset Error and Gain Error

DAC CODE

Figure 11. Gain Error

Rev. 0 | Page 10 of 24

1...7 8 91011 12 13...24

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