Datasheet

LTC2754
5
2754f
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
t
7
CS/LD Low to SCK Positive Edge
●
5ns
t
8
CS/LD High to SCK Positive Edge
●
5ns
t
9
SRO Propagation Delay C
LOAD
= 10pF
●
26 ns
t
10
CLR Pulse Width Low
●
60 ns
t
11
LDAC Pulse Width Low
●
20 ns
t
12
CLR Low to RFLAG Low C
LOAD
= 10pF (Note 11)
●
70 ns
t
13
CS/LD High to RFLAG high C
LOAD
= 10pF (Note 11)
●
60 ns
SCK Frequency 50% Duty Cycle (Note 12)
●
25 MHz
TIMING CHARACTERISTICS
The ● denotes specifi cations that apply over the full operating temperature range,
otherwise specifi cations are at T
A
= 25°C.
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
OUT1X
and I
OUT2X
pins are held at ground.
Note 4: Input resistors measured from R
INX
to R
COMX
; feedback resistors
measured from R
COMX
to REFX.
Note 5: Using LT1469 with C
FEEDBACK
= 15pF. A ±0.0015% settling time
of 1.7s 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.
Note 6: Measured at the major carry transition, 0V to 5V range. Output
amplifi er: LT1469; C
FB
= 27pF.
Note 7. Full-scale transition; REF = 0V.
Note 8. Analog Crosstalk is defi ned as the AC voltage ratio V
OUTB
/V
REFA
,
expressed in dB. REFB is grounded, and DAC B is set to 0V-5V span and
zero-, mid- or full- scale code. V
REFA
is a 3V
RMS
, 1kHz sine wave. Crosstalk
between other DAC channels is similar or better.
Note 9. REF = 6V
RMS
at 1kHz. 0V to 5V range. DAC code = FS. Output
amplifi er = LT1469.
Note 10. Calculation from V
n
= √4kTRB, where k = 1.38E-23 J/°K
(Boltzmann constant), R = resistance (), T = temperature (°K), and B =
bandwidth (Hz). 0V to 5V Range; zero-, mid-, or full- scale.
Note 11. Guaranteed by design, not subject to test.
Note 12. When using SRO, maximum SCK frequency f
MAX
is limited by
SRO propagation delay t
9
as follows:
f
MAX
=
1
2t
9
+ t
S
()
⎛
⎝
⎜
⎜
⎞
⎠
⎟
⎟
, where t
S
is the setup time of the receiving device.
TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= 25°C, unless otherwise noted.
LTC2754-16
TEMPERATURE (°C)
–40
–1.0
INL (LSB)
–0.8
–0.4
–0.2
0.0
1.0
0.4
–20
20
0
40
–0.6
0.6
0.8
0.2
60
80
2754 G03
V
DD
= 5V
V
REF
= 5V
±10V RANGE
+INL
–INL
INL vs Temperature
Integral Nonlinearity (INL)
Differential Nonlinearity (DNL)
CODE
0
–1.0
INL (LSB)
–0.8
–0.4
–0.2
0
1.0
0.4
16384
32768
2754 G01
–0.6
0.6
0.8
0.2
49152
65535
V
DD
= 5V
V
REF
= 5V
±10V RANGE
CODE
0
–1.0
DNL (LSB)
–0.8
–0.4
–0.2
0
1.0
0.4
16384
32768
2754 G02
–0.6
0.6
0.8
0.2
49152
65535
V
DD
= 5V
V
REF
= 5V
±10V RANGE