9

®

DAC7613

V

V

4096

DIGITAL TIMING

Figure 3 and Table II provide detailed timing for the digital

interface of the DAC7613.

DIGITAL INPUT CODING

The DAC7613 input data is in Straight Binary format. The

output voltage is given by the following equation:

(1)

where N is the digital input code. This equation does not

include the effects of offset (zero-scale) or gain (full-scale)

errors.

FIGURE 3. Digital Input and Output Timing.

t

RCS

CS

t

RDS

t

RDH

t

CSD

t

DZ

R/W

Data Out

Data Valid

t

WCS

CS

t

WS

t

WH

R/W

t

RESET

t

LWD

LOADDAC

t

DS

t

DH

Data In

RESET

Data Output Timing

Digital Input Timing

SYMBOL

DESCRIPTION

MIN

TYP

MAX

UNITS

CS LOW for Read

200

ns

R/W HIGH to CS LOW

10

ns

R/W HIGH after CS HIGH

0

ns

CS HIGH to Data Bus in

100

ns

High Impedance

CS LOW to Data Bus Valid

100

160

ns

CS LOW for Write

50

ns

R/W LOW to CS LOW

0

ns

R/W LOW after CS HIGH

5

ns

Data Valid to CS LOW

0

ns

Data Valid after CS HIGH

5

ns

LOADDAC LOW

50

ns

RESET LOW

50

ns