LTC2636
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.
LTC2636-HMI12/-HMI10/-HMI8/-HMX12/-HMX10/-HMX8/-HZ12/-HZ10/-HZ8 (VFS = 4.096V)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
e
n
Output Voltage Noise Density
At f = 1kHz, External Reference
At f = 10kHz, External Reference
At f = 1kHz, Internal Reference
At f = 10kHz, Internal Reference
180
160
250
230
nV/√Hz
nV/√Hz
nV/√Hz
nV/√Hz
Output Voltage Noise
0.1Hz to 10Hz, External Reference
0.1Hz to 10Hz, Internal Reference
0.1Hz to 200kHz, External Reference
0.1Hz to 200kHz, Internal Reference
35
50
680
750
μV
P-P
μV
P-P
μV
P-P
μV
P-P
C
= 0.1μF
REF
TIMING 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.
LTC2636-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
t1
t2
t3
t4
t5
t6
t7
t8
t9
t10
SDI Valid to SCK Setup
SDI Valid to SCK Hold
SCK High Time
4
ns
9
ns
SCK Low Time
9
ns
CS/LD Pulse Width
10
7
ns
LSB SCK High to CS/LD High
CS/LD Low to SCK High
CLR Pulse Width
ns
7
ns
20
15
7
ns
LDAC Pulse Width
ns
CS/LD High to SCK Positive Edge
SCK Frequency
ns
50% Duty Cycle
50
MHz
ns
t11
CS/LD High to LDAC High or Low Transition
200
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 5: Inferred from measurement at code 16 (LTC2636-12), code 4
(LTC2636-10) or code 1 (LTC2636-8), and at full-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 specified maximum operating junction temperature may impair
device reliability.
is derated at temperatures greater than 105°C.
Note 4: Linearity and monotonicity are defined from code k to code 2 –1,
N
Note 7: Digital inputs at 0V or V
.
CC
L
N
where N is the resolution and k is given by k = 0.016•(2 / V ), rounded
Note 8: Guaranteed by design and not production tested.
L
L
FS
to the nearest whole code. For V = 2.5V and N = 12, k = 26 and linearity
FS
L
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 10: Temperature coefficient is calculated by dividing the maximum
is defined from code 26 to code 4,095. For V = 4.096V and N = 12, k =
FS
L
16 and linearity is defined from code 16 to code 4,095.
change in output voltage by the specified temperature range.
Note 11: Thermal resistance of MSOP package limits I
to
OUT
–5mA ≤ I
≤ 5mA for H-grade MSOP parts and V = 5V 10%.
OUT
CC
2636f
9