AD5753 datasheet(29/72 Pages) AD

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Data Sheet

AD5753

Rev. 0 | Page 29 of 72

TERMINOLOGY

Total Unadjusted Error (TUE)

TUE is a measure of the output error that takes into account

various errors, such as INL error, offset error, gain error, and

output drift over supplies, temperature, and time. TUE is

expressed in % FSR.

Relative Accuracy or Integral Nonlinearity (INL)

For the DAC, relative accuracy, also known as INL, is a measure

of the maximum deviation, either in LSBs or % FSR, from the

best fit line passing through the DAC transfer function.

Differential Nonlinearity (DNL)

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 mono-

tonicity.

Monotonicity

A DAC is monotonic if the output either increases or remains

constant for increasing digital input code. The AD5753 is

monotonic over the full operating temperature range.

Zero-Scale or Negative Full-Scale Error

Zero-scale or negative full-scale error is the error in the DAC

output voltage when 0x0000 (straight binary coding) is loaded

to the DAC output register.

Zero-Scale Temperature Coefficient (TC)

Zero-scale TC is a measure of the change in zero-scale error

with a change in temperature. Zero-scale error TC is expressed

in ppm FSR/°C.

Bipolar Zero Error

Bipolar zero error is the deviation of the analog output from the

ideal half-scale output of 0 V when the DAC output register is

loaded with 0x8000 (straight binary coding).

Bipolar Zero Temperature Coefficient (TC)

Bipolar zero TC is a measure of the change in the bipolar zero

error with a change in temperature. It is expressed in ppm FSR/°C.

Offset Error

Offset error is the deviation of the analog output from the ideal and

is measured using ¼ scale and ¾ scale digital code measurements.

It is expressed in % FSR.

Offset Error (TC)

Offset error TC is a measure of the change in the offset error

with a change in temperature. It is expressed in ppm FSR/°C.

Gain Error

Gain error is a measure of the span error of the DAC. It is the

DAC transfer characteristic slope deviation from the ideal value

expressed in % FSR.

Gain Error Temperature Coefficient (TC)

Gain error TC is a measure of the change in gain error with

changes in temperature. Gain error TC is expressed in

ppm FSR/°C.

Full-Scale Error

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

code is loaded to the DAC output register. Ideally, the output is

full-scale − 1 LSB. Full-scale error is expressed in % FSR.

Headroom

Headroom is the difference between the voltage required at the

output, which is the programmed voltage in voltage output

mode and the programmed current × RLOAD in current output

mode, and the voltage supplied by the positive supply rail, VDPC+.

Headroom is relevant when the output is positive with respect

to ground.

Footroom

Footroom is the difference between the voltage required at the

output, which is the programmed voltage in voltage output

mode and the programmed current × RLOAD in current output

mode, and the voltage supplied by the negative supply rail, AVSS.

Footroom is relevant when the output is negative with respect

to ground.

VOUT or −VSENSE Common-Mode Rejection Ratio (CMRR)

VOUT or −VSENSE CMRR is the error in the VOUT voltage that

occurs due to changes in the –VSENSE voltage.

Current Loop Compliance Voltage

Current loop compliance voltage is the maximum voltage at the

VIOUT pin for which the output current is equal to the

programmed value.

Voltage Reference Thermal Hysteresis

Voltage reference thermal hysteresis is the difference in output

voltage measured at +25°C compared to the output voltage

measured at +25°C after cycling the temperature from +25°C to

−40°C to +115°C and then back to +25°C.

Voltage Reference TC

Voltage reference TC is a measure of the change in the reference

output voltage with a change in temperature. The reference TC

is calculated by using the box method. This method defines the

TC as the maximum change in the reference output over a given

temperature range expressed in ppm/°C and is as follows:

REF

MAX

REF

MIN

REF

NOM

Temp Range



−





where:

VREF_MAX is the maximum reference output measured over the

total temperature range.

VREF_MIN is the minimum reference output measured over the

total temperature range.

VREF_NOM is the nominal reference output voltage, 2.5 V.

Temp Range is the specified temperature range, −40°C to

+115°C.

AD5753 Datasheet(PDF) 29 Page - Analog Devices

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