10-10

Definition of Terms

Nonlinearity: Error contributed by deviation of the DAC

transfer function from a “best straight line” through the actual

plot

of

transfer

function.

Normally

expressed

as

a

percentage of full scale range or in (sub)multiples of 1 LSB.

Resolution: It is addressing the smallest distinct analog

output change that a D/A converter can produce. It is

commonly expressed as the number of converter bits. A

converter with resolution of n bits can resolve output changes

conversion. Resolution by no means implies linearity.

Settling Time: Time required for the output of a DAC to

settle to within specified error band around its final value

inputs LOW to HIGH and HIGH to LOW.

Gain Error: The difference between actual and ideal analog

output values at full-scale range, i.e., all digital inputs at

HIGH state. It is expressed as a percentage of full scale

range or in (sub)multiples of 1 LSB.

Feedthrough Error: Error caused by capacitive coupling

terminals to ground.

Output Leakage Current: Current which appears on

terminal when all digital inputs are HIGH.

For further information on the use of this device, see the

following Application Notes:

ANALOG OUTPUT

Output Capacitance

(Note 4)

-

100

-

100

-

100

-

100

pF

-

30

-

30

-

35

-

35

pF

(Note 4)

-

30

-

30

-

35

-

35

pF

-

100

-

100

-

100

-

100

pF

DIGITAL INPUTS

-

0.8

-

0.8

-

0.8

-

0.8

V

2,4

-

2,4

-

2.4

-

2.4

-

V

Input Current (Low or High),

-

±1-

±1-

±1-

±1

µA

Input Coding

See Tables 1 and 3

Binary/Offset Binary

Binary/Offset Binary

Input Capacitance

(Note 4)

-

4

-

4

-

4

-

4

pF

POWER SUPPLY CHARACTERISTICS

Power Supply Voltage Range

(Note 6)

+5 to +16

+5 to +16

V

I+

All Digital Inputs High or

Low (Excluding Ladder

Network)

-

2

-

2.5

-

2

-

2.5

mA

NOTES:

2. Full Scale Range (FSR) is 10V for unipolar and

±10V for bipolar modes.

4. Guaranteed by design or characterization and not production tested.

5. Accuracy not guaranteed unless outputs at ground potential.

6. Accuracy is tested and guaranteed at V+ = +15V, only.

Electrical Specifications

PARAMETER

TEST CONDITIONS

AD7523

AD7533

UNITS

MIN

MAX

MIN

MAX

MIN

MAX

MIN

MAX

NOTE #

DESCRIPTION

AnswerFAX

DOC. #

AN002

“Principles of Data Acquisition and

Conversion”

9002

AN018

“Do’s and Don’ts of Applying A/D

Converters”

9018

AN042

“Interpretation of Data Conversion

Accuracy Specifications”

9042

AD7523, AD7533