AD586 datasheet(26/48 Pages) AD

26 / 48 page

AD5735

Data Sheet

Rev. B | Page 26 of 48

TERMINOLOGY

Relative Accuracy or Integral Nonlinearity (INL)

Relative accuracy, or integral nonlinearity (INL), is a measure

of the maximum deviation from the best fit line through the

DAC transfer function. INL is expressed in percent of full-scale

range (% FSR). Typical INL vs. code plots are shown in Figure 8

and Figure 31.

Differential Nonlinearity (DNL)

Differential nonlinearity (DNL) is the difference between the

measured change and the ideal 1 LSB change between any two

adjacent codes. A specified DNL of ±1 LSB maximum ensures

monotonicity. The AD5735 is guaranteed monotonic by design.

Typical DNL vs. code plots are shown in Figure 9 and Figure 32.

Monotonicity

A DAC is monotonic if the output either increases or remains

constant for increasing digital input code. The AD5735 is

monotonic over its full operating temperature range.

Negative Full-Scale Error or Zero-Scale Error

Negative full-scale error is the error in the DAC output voltage

when 0x0000 (straight binary coding) is loaded to the DAC

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 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 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

In voltage output mode, offset error is the deviation of the

analog output from the ideal quarter-scale output when the

DAC is configured for a bipolar output range and the DAC

In current output mode, offset error is the deviation of the

analog output from the ideal zero-scale output when all DAC

registers are loaded with 0x0000.

Offset Error Drift or Offset TC

Offset error drift, or offset TC, is a measure of the change in

offset error with changes in temperature and is expressed in

ppm FSR/°C.

Gain Error

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

deviation in slope of the DAC transfer function from the ideal,

expressed in % FSR.

Gain Temperature Coefficient (TC)

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

in temperature and 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 register. Ideally, the output should be

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

Full-Scale Temperature Coefficient (TC)

Full-scale TC is a measure of the change in full-scale error with

changes in temperature and is expressed in ppm FSR/°C.

Total Unadjusted Error (TUE)

Total unadjusted error (TUE) is a measure of the output error

that includes all the error measurements: INL error, offset error,

gain error, temperature, and time. TUE is expressed in % FSR.

DC Crosstalk

DC crosstalk is the dc change in the output level of one DAC in

response to a change in the output of another DAC. It is measured

with a full-scale output change on one DAC while monitoring

another DAC, which is at midscale.

Current Loop Compliance Voltage

The current loop compliance voltage is the maximum voltage

at the IOUT_x 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 +105°C and back to +25°C. The hysteresis is specified

for the first and second temperature cycles and is expressed in ppm.

Output Voltage Settling Time

Output voltage settling time is the amount of time it takes

for the output to settle to a specified level for a full-scale input

change. Plots of settling time are shown in Figure 23, Figure 48,

and Figure 49.

Slew Rate

The slew rate of a device is a limitation in the rate of change of

the output voltage. The output slewing speed of a voltage output

DAC is usually limited by the slew rate of the amplifier used at

its output. Slew rate is measured from 10% to 90% of the output

signal and is given in V/µs.

Power-On Glitch Energy

Power-on glitch energy is the impulse injected into the analog

output when the AD5735 is powered on. It is specified as the

area of the glitch in nV-sec (see Figure 28 and Figure 45).

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