LTC2637 LINER [Linear Technology], LTC2637 Datasheet - Page 10

• Manufacturer Part Number: LTC2637
• Description: Mobile Communications
• Manufacturer: LINER [Linear Technology]

LTC2637
timing characteristics
LTC2637-HMI12/ LTC2637-HMI10/ LTC2637-HMI8/ LTC2637-HMX12/ LTC2637-HMX10/ LTC2637-HMX8/ LTC2637-HZ12/ LTC2637-HZ10/
LTC2637-HZ8 (V
SYMBOL PARAMETER
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 defined from code k
where N is the resolution and k
to the nearest whole code. For V
is defined from code 26 to code 4,095. For V
16 and linearity is defined from code 16 to code 4,095.
Note 5: Inferred from measurement at code 16 (LTC2637-12), code 4
(LTC2637-10) or code 1 (LTC2637-8), 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.
0
otherwise specifications are at T
SCL
HD(STA)
LOW
HIGH
SU(STA)
HD(DAT)
SU(DAT)
r
f
SU(STO)
BUF
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
FS
=4.096V)
L
FS
is given by k
= 2.5V and N = 12, k
A
= 25°C. V
FS
L
= 0.016•(2
= 4.096V and N = 12, k
CC
=4.5V to 5.5V. (See Figure 1) (Note 13).
L
= 26 and linearity
N
/ V
L
to code 2
The
FS
), rounded
l
CONDITIONS
(Note 12)
(Note 12)
denotes specifications that apply over the full operating temperature range,
N
L
–1,
=
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 coefficient is calculated by dividing the maximum
change in output voltage by the specified temperature range.
Note 11: Maximum V
Note 12: C
Note 13: All values refer to V
Note 14: Minimum V
won’t damage the IC, but could degrade performance.
Note 15: Thermal resistance of MSOP package limits I
–5mA ≤ I
OUT
B
= Capacitance of one bus line in pF.
≤ 5mA for H-grade MSOP parts and V
IL
IH
exceeds Absolute Maximum rating. This condition
l
l
l
l
l
l
l
l
l
l
l
= V
CC(MAX)
20 + 0.1C
20 + 0.1C
IH
MIN
= V
100
0.6
1.3
0.6
0.6
0.6
1.3
CC
0
0
.
IN(MIN)
+ 0.5V.
B
B
and V
TYP
IL
= V
CC
IL(MAX)
= 5V ±10%.
OUT
MAX
400
300
300
0.9
to
levels.
UNITS
2637fa
kHz
µs
µs
µs
µs
µs
ns
ns
ns
µs
µs