ltc2631-z Linear Technology Corporation, ltc2631-z Datasheet - Page 11

• Manufacturer Part Number: ltc2631-z
• Description: Single 12-/10-/8-bit I 2c Vout Dacs With Bidirectional Reference
• Manufacturer: Linear Technology Corporation

TIMING CHARACTERISTICS
SYMBOL
f
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: High temperatures degrade operating lifetimes. Operating lifetime
is derated at temperatures greater than 105°C.
Note 4: Linearity and monotonicity are defi ned from code k
2
rounded to the nearest whole code. For V
linearity is defi ned from code 26 to code 4,095. For V
N = 12, k
Note 5: Inferred from measurement at code 16 (LTC2631-12), code 4
(LTC2631-10) or code 1 (LTC2631-8), 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 specifi ed maximum operating junction temperature may impair
device reliability.
range, otherwise specifi cations are at T
LTC2631-HM12/-HM10/-HM8/-HZ12/-HZ10/-HZ8, LTC2631A-HM12/-HZ12 (V
SCL
HD(STA)
LOW
HIGH
SU(STA)
HD(DAT)
SU(DAT)
r
f
SU(STO)
BUF
N
– 1, where N is the resolution and k
L
= 16 and linearity is defi ned from code 16 to code 4,095.
PARAMETER
SCL Clock Frequency
Hold Time (Repeated) Start Condition
Low Period of the SCL Clock Pin
High Period of the SCL Clock Pin
Set-Up Time for a Repeated Start Condition
Data Hold Time
Data Set-Up Time
Rise Time of Both SDA and SCL Signals
Fall Time of Both SDA and SCL Signals
Set-Up Time for Stop Condition
Bus Free Time Between a Stop and Start Condition
L
is given by k
FS
= 2.5V and N = 12, k
A
= 25°C. V
L
FS
= 0.016 • (2
= 4.096V and
CC
L
The
to code
= 4.5V to 5.5V. (See Figure 1) (Note 13).
l
L
= 26 and
N
denotes the specifi cations which apply over the full operating temperature
/ V
FS
CONDITIONS
(Note 12)
(Note 12)
),
Note 7: Digital inputs at 0V or V
Note 8: Guaranteed by design and not production tested.
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 coeffi cient is calculated by dividing the maximum
change in output voltage by the specifi ed temperature range.
Note 11: Maximum V
Note 12: C
Note 13: All values refer to V
Note 14: Minimum V
condition won’t damage the IC, but could degrade performance.
Note 15: Full-scale error is determined using the reference voltage
measured at the REF pin.
FS
= 4.096V)
B
= capacitance of one bus line in pF
IL
IH
exceeds the Absolute Maximum rating. This
= V
CC(MAX)
IH
l
l
l
l
l
l
l
l
l
l
l
= V
CC
20 + 0.1C
20 + 0.1C
.
IH(MIN)
+ 0.5V
MIN
100
0.6
1.3
0.6
0.6
0.6
1.3
0
0
and V
B
B
IL
TYP
= V
LTC2631
IL(MAX)
MAX
400
300
300
0.9
levels.
11
UNITS
2631fa
kHz
μs
μs
μs
μs
μs
ns
ns
ns
μs
μs