Datasheet

22
®
DAC7744
SYMBOL DESCRIPTION MIN TYP MAX UNITS
t
RCS
CS LOW for Read 100 ns
t
RDS
R/W HIGH to CS LOW 10 ns
t
RDH
R/W HIGH after CS HIGH 10 ns
t
DZ
CS HIGH to Data Bus in High Impedance 10 70 ns
t
CSD
CS LOW to Data Bus Valid 85 130 ns
t
WCS
CS LOW for Write 40 ns
t
WS
R/W LOW to CS LOW 0 ns
t
WH
R/W LOW after CS HIGH 10 ns
t
AS
Address Valid to CS LOW 0 ns
t
AH
Address Valid after CS HIGH 15 ns
t
LS
CS LOW to LOADDACS HIGH 40 ns
t
LH
CS LOW after LOADDACS HIGH 80 ns
t
LX
LOADDACS HIGH 40 ns
t
DS
Data Valid to CS LOW 0 ns
t
DH
Data Valid after CS HIGH 15 ns
t
LWD
LOADDACS LOW 40 ns
t
SS
RSTSEL Valid Before RESET HIGH 0 ns
t
SH
RSTSEL Valid After RESET HIGH 120 ns
t
RSS
RESET LOW Before RESET HIGH 10 ns
t
RSH
RESET LOW After RESET HIGH 10 ns
t
S
Settling Time 11 µs
TABLE II. Timing Specifications (T
A
= –40°C to +85°C).
FIGURE 11. Digital Input and Output Timing.
t
RCS
CS
t
RDS
t
RDH
t
AS
t
CSD
t
DZ
t
AH
R/W
A0/A1
Data Out
Data Valid
t
WCS
CS
t
WS
t
AS
t
AH
t
WH
R/W
A0/A1
t
LS
t
LWD
t
LH
t
S
±0.003% of FSR
Error Band
±0.003% of FSR
Error Band
t
LX
LOADDACS
t
DS
t
DH
Data In
V
OUT
Data Read Timing
Data Write Timing
t
RSH
RST
V
OUT
,RESET SEL LOW
+FS
–FS
t
SS
t
SH
RESET SEL
V
OUT
,RESET SEL HIGH
MS
+FS
–FS
DAC7744 Reset Timing
t
RSS