AD5522JSVDZ datasheet(30/65 Pages) AD

30 / 65 page

Data Sheet

AD5522

Rev. E | Page 29 of 64

TERMINOLOGY

Offset Error

Offset error is a measure of the difference between the actual

voltage and the ideal voltage at midscale or at zero current

expressed in mV or % FSR.

Gain Error

Gain error is the difference between full-scale error and zero-

scale error. It is expressed in % FSR.

Gain Error = Full-Scale Error − Zero-Scale Error

where:

Full-Scale Error is the difference between the actual voltage and

the ideal voltage at full scale.

Zero-Scale Error is the difference between the actual voltage and

the ideal voltage at zero scale.

Linearity Error

Linearity error, or relative accuracy, is a measure of the

maximum deviation from a straight line passing through the

endpoints of the full-scale range. It is measured after adjusting

for gain error and offset error and is expressed in % FSR.

Differential Nonlinearity (DNL)

Differential nonlinearity 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.

Common-Mode (CM) Error

Common-mode (CM) error is the error at the output of the

amplifier due to the common-mode input voltage. It is

expressed in % of FSVR/V.

Leakage Current

Leakage current is the current measured at an output pin when

that function is off or high impedance.

Pin Capacitance

Pin capacitance is the capacitance measured at a pin when that

function is off or high impedance.

Slew Rate

The slew rate is the rate of change of the output voltage

expressed in V/μs.

Output Voltage Settling Time

Output voltage settling time is the amount of time it takes for

the output of a DAC to settle to a specified level for a full-scale

input change.

Digital-to-Analog Glitch Energy

Digital-to-analog glitch energy is the amount of energy that is

injected into the analog output at the major code transition. It

is specified as the area of the glitch in nV-sec. It is measured by

toggling the DAC register data between 0x7FFF and 0x8000.

Digital Crosstalk

Digital crosstalk is defined as the glitch impulse transferred to

the output of one converter due to a change in the DAC register

code of another converter. It is specified in nV-sec.

AC Crosstalk

AC crosstalk is defined as the glitch impulse transferred to the

output of one PMU due to a change in any of the DAC registers

in the package.

ACPSRR

ACPSRR is a measure of the ability of the device to avoid

coupling noise and spurious signals that appear on the supply

voltage pin to the output of the switch. The dc voltage on the

device is modulated by a sine wave of 0.2 V p-p. The ratio of the

amplitude of the signal on the output to the amplitude of the

modulation is the ACPSRR.

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