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LTC1665_15 Datasheet, PDF (4/18 Pages) Linear Technology – Micropower Octal 8-Bit and 10-Bit DACs
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LTC1665/LTC1660
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
t2
DIN Valid to SCK Hold
t3
SCK High Time
t4
SCK Low Time
t5
CS/LD Pulse Width
t6
LSB SCK High to CS/LD High
t7
CS/LD Low to SCK High
t8
DOUT Propagation Delay
t9
SCK Low to CS/LD Low
t10
CLR Pulse Width
t11
CS/LD High to SCK Positive Edge
SCK Frequency
(Note 6)
(Note 6)
(Note 6)
(Note 6)
(Note 6)
CLOAD = 15pF (Note 6)
(Note 6)
(Note 6)
(Note 6)
Continuous Square Wave (Note 6)
Continuous 23% Duty Cycle Pulse (Note 6)
Gated Square Wave (Note 6)
l 40
l
0
l 30
l 30
l 80
l 30
l 80
l
5
l 20
l 100
l 30
l
l
l
ns
ns
ns
ns
ns
ns
ns
80
ns
ns
ns
ns
5.00
MHz
7.69
MHz
16.7
MHz
VCC = 2.7V to 5.5V
t1
DIN Valid to SCK Setup
t2
DIN Valid to SCK Hold
t3
SCK High Time
t4
SCK Low Time
t5
CS/LD Pulse Width
t6
LSB SCK High to CS/LD High
t7
CS/LD Low to SCK High
t8
DOUT Propagation Delay
t9
SCK Low to CS/LD Low
t10
CLR Pulse Width
t11
CS/LD High to SCK Positive Edge
SCK Frequency
(Note 6)
(Note 6)
(Note 6)
(Note 6)
(Note 6)
(Note 6)
(Note 6)
CLOAD = 15pF (Note 6)
(Note 6)
(Note 6)
(Note 6)
Continuous Square Wave (Note 6)
Continuous 28% Duty Cycle Pulse
Gated Square Wave
l 60
l
0
l 50
l 50
l 100
l 50
l 100
l
5
l 30
l 120
l 30
l
l
l
ns
ns
ns
ns
ns
ns
ns
150
ns
ns
ns
ns
3.85
MHz
5.55
MHz
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.
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