Datasheet

LTC2483
5
2483fc
Timing characTerisTics
The l denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C. (Note 3)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
f
EOSC
External Oscillator Frequency Range
l
10 4000 kHz
t
HEO
External Oscillator High Period
l
0.125 100 µs
t
LEO
External Oscillator Low Period
l
0.125 100 µs
t
CONV_1
Conversion Time Simultaneous 50Hz/60Hz
External Oscillator (Note 10)
l
l
144.1 146.9
41036/f
EOSC
149.9 ms
ms
i
2
c Timing characTerisTics
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Notes 3, 15)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
f
SCL
SCL Clock Frequency
l
0 400 kHz
t
HD(SDA)
Hold Time (Repeated) START Condition
l
0.6 µs
t
LOW
LOW Period of the SCL Clock Pin
l
1.3 µs
t
HIGH
HIGH Period of the SCL Clock Pin
l
0.6 µs
t
SU(STA)
Set-Up Time for a Repeated START Condition
l
0.6 µs
t
HD(DAT)
Data Hold Time
l
0 0.9 µs
t
SU(DAT)
Data Set-Up Time
l
100 ns
t
r
Rise Time for Both SDA and SCL Signals (Note 14)
l
20 + 0.1C
B
300 ns
t
f
Fall Time for Both SDA and SCL Signals (Note 14)
l
20 + 0.1C
B
300 ns
t
SU(STO)
Set-Up Time for STOP Condition
l
0.6 µs
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 voltage values are with respect to GND.
Note 3: V
CC
= 2.7V to 5.5V unless otherwise specified.
V
REF
= REF
+
– REF
–
, V
REFCM
= (REF
+
+ REF
–
)/2, FS = 0.5V
REF
;
V
IN
= IN
+
– IN
–
, V
INCM
= (IN
+
+ IN
–
)/2.
Note 4: Use internal conversion clock or external conversion clock source
with f
EOSC
= 307.2kHz unless otherwise specified.
Note 5: Guaranteed by design, not subject to test.
Note 6: Integral nonlinearity is defined as the deviation of a code from a
straight line passing through the actual endpoints of the transfer curve.
The deviation is measured from the center of the quantization band.
Note 7: 50Hz f
EOSC
= 256kHz ±2% (external oscillator).
Note 8: 60Hz f
EOSC
= 307.2kHz ±2% (external oscillator).
Note 9: Simultaneous 50Hz/60Hz (internal oscillator) or f
EOSC
= 280kHz
±2% (external oscillator).
Note 10: The external oscillator is connected to the CA0/F
0
pin. The
external oscillator frequency, f
EOSC
, is expressed in kHz.
Note 11: The converter uses the internal oscillator.
Note 12: The output noise includes the contribution of the internal
calibration operations.
Note 13: Guaranteed by design and test correlation.
Note 14: C
B
= capacitance of one bus line in pF.
Note 15: All values refer to V
IH(MIN)
and V
IL(MAX)
levels.