LTC2634
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 4.5V to 5.5V, VOUT unloaded unless otherwise specified.
LTC2634-HMI12/-HMI10/-HMI8/-HMX12/-HMX10/-HMX8/-HZ12/-HZ10/-HZ8 (VFS = 4.096V)
SYMBOL PARAMETER
CONDITIONS
MIN
4
TYP
MAX
UNITS
ns
l
l
l
l
l
l
l
l
l
l
l
l
t
t
t
t
t
t
t
t
t
t
SDI Valid to SCK Setup
SDI Valid to SCK Hold
1
4
ns
2
SCK High Time
9
ns
3
SCK Low Time
9
ns
4
CS/LD Pulse Width
10
7
ns
5
LSꢀ SCK High to CS/LD High
CS/LD Low to SCK High
CLR Pulse Width
ns
6
7
ns
7
20
15
7
ns
8
LDAC Pulse Width
ns
9
CS/LD High to SCK Positive Edge
SCK Frequency
ns
10
50% Duty Cycle
50
20
MHz
ns
t
t
CS/LD High to LDAC High or Low Transition
SDO Propagation Delay from SCK Falling Edge
200
11
12
C
= 10pF
= 4.5V to 5.5V
LOAD
CC
l
V
ns
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 specified maximum operating junction temperature may impair
device reliability.
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: High temperatures degrade operating lifetimes. Operating lifetime
Note 7: Digital inputs at 0V or V
.
CC
Note 8: Guaranteed by design and not production tested.
is derated at temperatures greater than 105°C.
Note 9: 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 100pF to GND.
Note 4: Linearity and monotonicity are defined from code k to code
L
N
N
2 – 1, where N is the resolution and k is given by k = 0.016 • (2 / V ),
L
L
FS
rounded to the nearest whole code. For V = 2.5V and N = 12, k = 26
Note 10: Temperature coefficient is calculated by dividing the maximum
change in output voltage by the specified temperature range.
FS
L
and linearity is defined from code 26 to code 4,095. For V = 4.096V and
FS
N = 12, k = 16 and linearity is defined from code 16 to code 4,095.
L
Note 5: Inferred from measurement at code 16 (LTC2634-12), code 4
(LTC2634-10) or code 1 (LTC2634-8), and at full-scale.
2634f
10