LTC2751
5
2751fa
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
DD
= 2.7V to 3.3V
Write and Update Timing
t
1
I/O Valid to WR Rising Edge Set-Up
l
18 ns
t
2
I/O Valid to WR Rising Edge Hold
l
18 ns
t
3
WR Pulse Width
l
30 ns
t
4
UPD Pulse Width
l
30 ns
t
5
UPD Falling Edge to WR Falling Edge No Data Shoot-Through
l
0 ns
t
6
WR Rising Edge to UPD Rising Edge (Note 10)
l
0 ns
t
7
D/S Valid to WR Falling Edge Set-Up Time
l
18 ns
t
8
WR Rising Edge to D/S Valid Hold Time
l
18 ns
Readback Timing
t
13
WR Rising Edge to Read Rising Edge
l
18 ns
t
14
Read Falling Edge to WR Falling Edge (Note 10)
l
40 ns
t
15
Read Rising Edge to I/O Propagation Delay C
L
= 10pF
l
40 ns
t
17
UPD Valid to I/O Propagation Delay C
L
= 10pF
l
40 ns
t
18
D/S Valid to Read Rising Edge (Note 10)
l
18 ns
t
19
Read Rising Edge to UPD Rising Edge No Update
l
9 ns
t
20
UPD Falling Edge to Read Falling Edge No Update
l
9 ns
t
22
READ Falling Edge to UPD Rising Edge (Note 10)
l
18 ns
t
23
I/O Bus Hi-Z to Read Rising Edge (Note 10)
l
0 ns
t
24
Read Falling Edge to I/O Bus Active (Note 10)
l
40 ns
CLR Timing
t
25
CLR Pulse Width Low
l
30 ns
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: Continuous operation above the specified maximum operating
junction temperature may impair device reliability.
Note 3: Because of the proprietary SoftSpan switching architecture, the
measured resistance looking into each of the specified pins is constant for
all output ranges if the I
OUT1
and I
OUT2
pins are held at ground.
Note 4: R1 is measured from R
IN
to R
COM
; R2 is measured from REF to
R
COM
.
Note 5: Using LT1469 with C
FEEDBACK
= 15pF. A ±0.0015% settling time
of 1.7μs can be achieved by optimizing the time constant on an individual
TiMing characTerisTics
V
DD
= 5V, V
REF
= 5V unless otherwise specified. The l denotes specifications that
apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C.
basis. See Application Note 74, “Component and Measurement Advances
Ensure 16-Bit DAC Settling Time.”
Note 6: Measured at the major carry transition, 0V to 5V range. Output
amplifier: LT1469; C
FB
= 27pF.
Note 7. Full-scale transition; REF = 0V.
Note 8. REF = 6V
RMS
at 1kHz. 0V to 5V range. DAC code = FS. Output
amplifier = LT1469.
Note 9. Calculation from V
n
= √4kTRB, where k = 1.38E-23 J/°K
(Boltzmann constant), R = resistance (W), T = temperature (°K), and B =
bandwidth (Hz).
Note 10. Guaranteed by design. Not production tested.
