LTC2754 LINER [Linear Technology], LTC2754 Datasheet - Page 5

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