LTC2751-14 Linear Technology Corporation, LTC2751-14 Datasheet - Page 5

• Manufacturer Part Number: LTC2751-14
• Description: Ltc2751-14 - Current Output 14-bit Softspan Dacs With Parallel I/o
• Manufacturer: Linear Technology Corporation

TIMING CHARACTERISTICS
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 specifi ed 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 specifi ed pins is constant for
all output ranges if the I
Note 4: R1 is measured from R
R
Note 5: Using LT1469 with C
of 1.7μs can be achieved by optimizing the time constant on an individual
SYMBOL
V
Write and Update Timing
t
t
t
t
t
t
t
t
Readback Timing
t
t
t
t
t
t
t
t
t
t
⎯ C ⎯ L ⎯ R Timing
t
apply over the full operating temperature range, otherwise specifi cations are at T
1
2
3
4
5
6
7
8
13
14
15
17
18
19
20
22
23
24
25
DD
COM
= 2.7V to 3.3V
.
PARAMETER
I/O Valid to ⎯ W ⎯ R Rising Edge Set-Up
I/O Valid to ⎯ W ⎯ R Rising Edge Hold
⎯ W ⎯ R Pulse Width
UPD Pulse Width
UPD Falling Edge to ⎯ W ⎯ R Falling Edge
⎯ W ⎯ R Rising Edge to UPD Rising Edge
⎯ D /S Valid to ⎯ W ⎯ R Falling Edge Set-Up Time
⎯ W ⎯ R Rising Edge to ⎯ D /S Valid Hold Time
⎯ W ⎯ R Rising Edge to Read Rising Edge
Read Falling Edge to ⎯ W ⎯ R Falling Edge
Read Rising Edge to I/O Propagation Delay
UPD Valid to I/O Propagation Delay
⎯ D /S Valid to Read Rising Edge
Read Rising Edge to UPD Rising Edge
UPD Falling Edge to Read Falling Edge
READ Falling Edge to UPD Rising Edge
I/O Bus Hi-Z to Read Rising Edge
Read Falling Edge to I/O Bus Active
⎯ C ⎯ L ⎯ R Pulse Width Low
OUT1
FEEDBACK
and I
IN
to R
OUT2
COM
= 15pF. A ±0.0015% settling time
pins are held at ground.
; R2 is measured from REF to
V
DD
CONDITIONS
No Data Shoot-Through
(Note 10)
(Note 10)
C
C
(Note 10)
No Update
No Update
(Note 10)
(Note 10)
(Note 10)
= 5V, V
L
L
= 10pF
= 10pF
REF
= 5V unless otherwise specifi ed. The
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
amplifi er: LT1469; C
Note 7. Full-scale transition; REF = 0V.
Note 8. REF = 6V
amplifi er = LT1469.
Note 9. Calculation from V
(Boltzmann constant), R = resistance (Ω), T = temperature (°K), and B =
bandwidth (Hz).
Note 10. Guaranteed by design. Not production tested.
A
= 25°C.
RMS
FB
at 1kHz. 0V to 5V range. DAC code = FS. Output
= 27pF.
n
= √ ⎯ 4 ⎯ k ⎯ T ⎯ R ⎯ ⎯ ⎯ B , where k = 1.38E-23 J/°K
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
MIN
18
18
30
30
18
18
18
40
18
18
40
30
0
0
9
9
0
●
denotes specifi cations that
TYP
LTC2751
MAX
40
40
UNITS
5
2751f
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns