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X3\ ELECTROSTATIC

V£y DISCHARGE SENSITIVITY

Electrostatic discharge can cause damage ranging from per-

formance degradation to complete device

failure.

Burr-Brown

Corporation recommends that all integrated circuits be handled

and stored using appropriate ESD protection methods.

PACKAGE INFORMATION"

MODEL

PACKAGE

PACKAGE DRAWING

NUMBER

DAC667JP 28-Pin Plastic DIP

215

DAC667KP 28-Pin Plastic DIP

215

DAC667AH

28LD Side-Brazed

149

Ceramic DIP

DAC667BH

28U> Side-Brazed

149

Ceramic DIP

NOTE: (1) For detailed drawing and dimension table, please see end of

sheet, or Appendix

of Burr-Brown IC Data Book.

ORDERING INFORMATION

MODEL

PACKAGE

TEMPERATURE

RANGE CC)

LINEARITY ERROR,

max«t25°C

GAIN TC, max

(ppm^C)

DAC667JP

Plastic'DIP

0to+70

±1/2LSB

±30

DAC667KP

Plastic DIP

Oto +70

±1/4LSB

±15

DAC667AH

Ceramic DIP -25 to +85 ±1/2LSB ±30

DAC667BH

Ceramic DIP -25 to+85 11/4LSB

±15

DISCUSSION OF

SPECIFICATIONS

LINEARITY ERROR

Linearity error is defined as the deviation of the analog

output from a straight line drawn between the end points

(digital inputs all ones and all zeros). DAC667 linearity error

is specified at ±1/4LSB max at +25°C for B and K grades,

and ±1/2LSB max for A and J grades.

DIFFERENTIAL LINEARITY ERROR

Differential linearity error (DLE) is the deviation from a

1LSB output change from one adjacent state to the next. A

DLE specification of 1/2LSB means that the output step size

can range from 1/2LSB to 3/2LSB when the digital input

code changes from one code word to the adjacent code word.

If the DLE is more positive than -1LSB, the D/A is said to

be monotonia

MONOTONICITY

A D/A converter is monotonic if the output either increases

or remains the same for increasing digital input values. All

grades of the DAC667 are monotonic over their specifica-

tion temperature range.

DRIFT

Gain drift is a measure of the change in the full scale range

(FSR) output over the specification temperature range. Gain

drift is expressed in parts per million per degree Celsius

(ppm/°C).

Unipolar offset drift is measured with a data input of

OOOhex. The D/A is configured for unipolar output. Unipolar

offset drift is expressed in parts per million of full scale

range per degree Celsius (ppm of FSR/°C).

Bipolar zero drift is measured with a data input of 800^^.

The D/A is configured for bipolar output Bipolar zero drift

is expressed in parts per million of full scale range per

degree Celsius (ppm of FSR/°C).

SETTLING TIME

Settling time is the total time (including slew time) for the

output to settle to within an error band around its final value

after a change in input. Three settling times are specified to

±0.01% of full scale range (FSR): two for FSR output

changes of 20V (lOkfi feedback) and 10V (5kfl feedback),

and one for a 1LSB change. The 1LSB change is measured

at the major cany (7f t

JffiX

to 800}^, and SOO^x

7FFHEX), the input transition at which worst-case settling

time occurs.

OPERATION

DAC667 is a monolithic integrated-circuit 12-bit D/A con-

verter. It is complete with 12-bit D/A switches and ladder

network, voltage reference, output amplifier and micro-

processor bus interface as shown in the front-page diagram.

INTERFACE LOGIC

The bus interface logic of the DAC667 consists of four

independently addressable latches in two ranks. The first

rank consists of three four-bit input latches which can be

loaded directly from a 4-, 8-, 12- or 16-bit microprocessor/

microcontroller bus. These latches hold data temporarily

while a complete 12-bit word is assembled before loading it

into the second rank of latches. This double buffered orga-

nization prevents the generation of spurious analog output

values while the complete word is being assembled.

Burr-Brown

Data Book

— Data

Conversion Products

1 2 3 4 5 6 7 8 9 10

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