Datasheet
LTC1664
4
1664fa
timing characteristics
The l denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C. (Figure 1)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
= 4.5V to 5.5V
t
1
D
IN
Valid to SCK Setup
l
40 ns
t
2
D
IN
Valid to SCK Hold
l
0 ns
t
3
SCK High Time (Note 6)
l
30 ns
t
4
SCK Low Time (Note 6)
l
30 ns
t
5
CS/LD Pulse Width (Note 6)
l
80 ns
t
6
LSB SCK High to CS/LD High (Note 6)
l
30 ns
t
7
CS/LD Low to SCK High (Note 6)
l
80 ns
t
8
D
OUT
Propagation Delay C
LOAD
= 15pF (Note 6)
l
5 80 ns
t
9
SCK Low to CS/LD Low (Note 6)
l
20 ns
t
10
CLR Pulse Width (Note 6)
l
100 ns
t
11
CS/LD High to SCK Positive Edge (Note 6)
l
30 ns
SCK Frequency (Notes 6 and 8)
l
16.7 MHz
V
CC
= 2.7V to 5.5V
t
1
D
IN
Valid to SCK Setup (Note 6)
l
60 ns
t
2
D
IN
Valid to SCK Hold (Note 6)
l
0 ns
t
3
SCK High Time (Note 6)
l
50 ns
t
4
SCK Low Time (Note 6)
l
50 ns
t
5
CS/LD Pulse Width (Note 6)
l
100 ns
t
6
LSB SCK High to CS/LD High (Note 6)
l
50 ns
t
7
CS/LD Low to SCK High (Note 6)
l
100 ns
t
8
D
OUT
Propagation Delay C
LOAD
= 15pF (Note 6)
l
5 150 ns
t
9
SCK Low to CS/LD Low (Note 6)
l
30 ns
t
10
CLR Pulse Width (Note 6)
l
120 ns
t
11
CS/LD High to SCK Positive Edge (Note 6)
l
30 ns
SCK Frequency (Notes 6 and 8)
l
10 MHz
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: Nonlinearity and monotonicity are defined and tested at
V
CC
= 5V, V
REF
= 4.096V, from code 20 to code 1023. See the Rail-to-Rail
Output Considerations section.
Note 3: Digital inputs at 0V or V
CC
.
Note 4: Load is 10kΩ in parallel with 100pF.
Note 5: V
CC
= V
REF
= 5V.
Note 6: Guaranteed by design and not subject to test.
Note 7: Measured at code 20.
Note 8: If a continuous clock is used, CS/LD timing (t
7
and t
9
) will limit
the maximum clock frequency to 5MHz at 4.5V to 5.5V (3.85MHz at 2.7V
to 5.5V).
Note 9: Any output shorted.