LTC2656 Linear Technology Corporation, LTC2656 Datasheet - Page 9

• Manufacturer Part Number: LTC2656
• Description: Octal 16-/12-Bit Rail-to-Rail DACs
• Manufacturer: Linear Technology Corporation

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ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifi cations are at T
SYMBOL
V
t
t
t
t
t
t
t
t
t
t
t
t
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: All voltages are with respect to GND.
Note 3: Linearity and monotonicity are defi ned from code kL to code
2
no output limiting occurs. For V
linearity is defi ned from code 128 to code 65535. For V
N = 12, kL = 8 and linearity is defi ned from code 8 to code 4,095.
Note 4: Inferred from measurement at code 128 (LTC2656-16) or code 8
(LTC2656-12).
Note 5: DC crosstalk is measured with V
reference with the measured DAC at mid-scale.
Note 6: This IC includes current limiting that is intended to protect the
device during momentary overload conditions. Junction temperature can
exceed the rated maximum during current limiting. Continuous operation
above the specifi ed maximum operating junction temperature may impair
device reliability.
1
2
3
4
5
6
7
8
9
10
12
13
N
CC
– 1, where N is the resolution and kL is the lower end code for which
= 2.7V to 5.5V
PARAMETER
SDI Valid to SCK Setup
SDI Valid to SCK Hold
SCK High Time
SCK Low Time
CS/LD Pulse Width
LSB SCK High to CS/LD High
CS/LD Low to SCK High
SDO Propagation Delay from SCK Falling Edge
CLR Pulse Width
CS/LD High to SCK Positive Edge
LDAC Pulse Width
CS/LD High to LDAC High or Low Transition
SCK Frequency
REF
= 2.5V and N = 16, kL = 128 and
CC
= 5V and using internal
REF
= 2.5V and
A
= 25°C. LTC2656B-L16/LTC2656-L12/LTC2656B-H16/LTC2656-H12 (see Figure 1).
CONDITIONS
C
V
V
50% Duty Cycle
LOAD
CC
CC
= 4.5V to 5.5V
= 2.7V to 4.5V
The
= 10pF
l
denotes the specifi cations which apply over the full operating
Note 7: Temperature coeffi cient is calculated by dividing the maximum
change in output voltage by the specifi ed temperature range.
Note 8: Digital inputs at 0V or V
Note 9: Guaranteed by design and not production tested.
Note 10: Internal reference mode. DAC is stepped 1/4 scale to 3/4 scale
and 3/4 scale to 1/4 scale. Load is 2kΩ in parallel with 200pF to GND.
Note 11: V
between half scale and half scale – 1LSB. Load is 2k in parallel with 200pF
to GND.
Note 12: DAC-to-DAC crosstalk is the glitch that appears at the output
of one DAC due to a full-scale change at the output of another DAC. It is
measured with V
DAC at mid-scale.
CC
= 5V, internal reference mode. DAC is stepped ±1LSB
CC
= 5V and using internal reference, with the measured
l
l
l
l
l
l
l
l
l
l
l
l
l
l
CC
.
MIN
200
10
20
15
4
4
9
9
7
7
7
TYP
LTC2656
MAX
20
45
50
UNITS
9
2656p
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns