Datasheet

9
®
DAC7613
V
OUT
= V
REFL
+
V
REFH
–V
REFL
()
•N
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
t
RCS
CS LOW for Read 200 ns
t
RDS
R/W HIGH to CS LOW 10 ns
t
RDH
R/W HIGH after CS HIGH 0 ns
t
DZ
CS HIGH to Data Bus in 100 ns
High Impedance
t
CSD
CS LOW to Data Bus Valid 100 160 ns
t
WCS
CS LOW for Write 50 ns
t
WS
R/W LOW to CS LOW 0 ns
t
WH
R/W LOW after CS HIGH 5 ns
t
DS
Data Valid to CS LOW 0 ns
t
DH
Data Valid after CS HIGH 5 ns
t
LWD
LOADDAC LOW 50 ns
t
RESET
RESET LOW 50 ns
TABLE II. Timing Specifications (T
A
= –40°C to +85°C).