LTC1665/LTC1660
4
166560fa
TIMING CHARACTERISTICS The l denotes specifications which apply over the full operating temperature
range, otherwise specifications are at TA = 25°C. (See Figure 1)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VCC = 4.5V to 5.5V
t1
DIN Valid to SCK Setup
l
40
ns
t2
DIN Valid to SCK Hold
l
0ns
t3
SCK High Time
(Note 6)
l
30
ns
t4
SCK Low Time
(Note 6)
l
30
ns
t5
CS/LD Pulse Width
(Note 6)
l
80
ns
t6
LSB SCK High to CS/LD High
(Note 6)
l
30
ns
t7
CS/LD Low to SCK High
(Note 6)
l
80
ns
t8
DOUT Propagation Delay
CLOAD = 15pF (Note 6)
l
580
ns
t9
SCK Low to CS/LD Low
(Note 6)
l
20
ns
t10
CLR Pulse Width
(Note 6)
l
100
ns
t11
CS/LD High to SCK Positive Edge
(Note 6)
l
30
ns
SCK Frequency
Continuous Square Wave (Note 6)
Continuous 23% Duty Cycle Pulse (Note 6)
Gated Square Wave (Note 6)
l
5.00
7.69
16.7
MHz
VCC = 2.7V to 5.5V
t1
DIN Valid to SCK Setup
(Note 6)
l
60
ns
t2
DIN Valid to SCK Hold
(Note 6)
l
0ns
t3
SCK High Time
(Note 6)
l
50
ns
t4
SCK Low Time
(Note 6)
l
50
ns
t5
CS/LD Pulse Width
(Note 6)
l
100
ns
t6
LSB SCK High to CS/LD High
(Note 6)
l
50
ns
t7
CS/LD Low to SCK High
(Note 6)
l
100
ns
t8
DOUT Propagation Delay
CLOAD = 15pF (Note 6)
l
5
150
ns
t9
SCK Low to CS/LD Low
(Note 6)
l
30
ns
t10
CLR Pulse Width
(Note 6)
l
120
ns
t11
CS/LD High to SCK Positive Edge
(Note 6)
l
30
ns
SCK Frequency
Continuous Square Wave (Note 6)
Continuous 28% Duty Cycle Pulse
Gated Square Wave
l
3.85
5.55
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 from code 4 to code
255 for the LTC1665 and from code 20 to code 1023 for the LTC1660.
See Applications Information.
Note 3: Digital inputs at 0V or VCC.
Note 4: Load is 10kΩ in parallel with 100pF.
Note 5: VCC = VREF = 5V. DAC switched between 0.1VFS and 0.9VFS,
i.e., codes 26 and 230 for the LTC1665 or codes 102 and 922 for the
LTC1660.
Note 6: Guaranteed by design and not production tested.
Note 7: Measured at code 4 for the LTC1665 and code 20 for the
LTC1660.