LTC2752 Linear Technology, LTC2752 Datasheet - Page 5

• Manufacturer Part Number: LTC2752
• Description: Dual16-Bit SoftSpan IOUT DACs
• Manufacturer: Linear Technology

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 specified maximum operating
junction temperature may impair device reliability.
Note 3: Calculation from feedback resistance and I
specifications; not production tested. In most applications, unipolar zero-
scale error is dominated by contributions from the output amplifier.
Note 4: Input resistors measured from R
measured from R
Note 5: DAC input resistance is independent of code.
Note 6: Parallel combination of the resistances from the specified pin to
I
Note 7: Using LT1468 with C
of 1.7μs can be achieved by optimizing the time constant on an individual
basis. See Application Note 74, Component and Measurement Advances
Ensure 16-Bit DAC Settling Time.
SYMBOL
t
t
t
t
t
t
otherwise specifications are at T
8
9
10
11
12
13
OUT1X
and from the specified pin to I
PARAMETER
CS/LD High to SCK Positive Edge
SRO Propagation Delay
CLR Pulse Width Low
LDAC Pulse Width Low
CLR Low to RFLAG Low
CS/LD High to RFLAG high
SCK Frequency
COMX
to REFX.
FEEDBACK
OUT2X
A
= 27pF. A ±0.0015% settling time
= 25°C.
INX
.
to R
COMX
OUT1
; feedback resistors
leakage current
The
CONDITIONS
C
C
C
50% Duty Cycle (Note 14)
l
LOAD
LOAD
LOAD
denotes specifications that apply over the full operating temperature range,
= 10pF
= 10pF (Note 13)
= 10pF (Note 13)
Note 8: Measured at the major carry transition, 0V to 5V range. Output
amplifier: LT1468; C
Note 9. Full-scale transition; REF = 0V.
Note 10. Analog Crosstalk is defined as the AC voltage ratio V
expressed in dB. REFB is grounded, and DAC B is set to 0V-5V span and
zero-, mid- or full- scale code. V
Note 11. REF = 6V
amplifier = LT1469.
Note 12. Calculation from V
(Boltzmann constant), R = resistance (Ω), T = temperature (°K), and
B = bandwidth (Hz). 0V to 5V Range; zero-, mid-, or full- scale.
Note 13. Guaranteed by design, not subject to test.
Note 14. When using SRO, maximum SCK frequency f
SRO propagation delay t
f
MAX
=



2
(
t
9
1
+
RMS
t
FB
S
)
= 50pF.



at 1kHz. 0V to 5V range. DAC code = FS. Output
, where t
9
as follows:
n
= √4kTRB, where k = 1.38E-23 J/°K
l
l
l
l
l
l
l
REFA
S
is the setup time of the receiving device.
MIN
is a 3V
60
20
5
RMS
TYP
, 1kHz sine wave.
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LTC2752
MAX
MAX
26
70
60
25
is limited by
OUTB
/V
UNITS
REFA

MHz
2752f
ns
ns
ns
ns
ns
ns
,