DS75
5 of 14
AC ELECTRICAL CHARACTERISTICS
(-55癈 to +125癈; 2.7V d V
DD
d 5.5V)
PARAMETER
SYMBOL CONDITION
MIN
TYP MAX UNITS NOTES
Resolution
9
12
bits
9-bit
conversions
150
10-bit
conversions
300
11-bit
conversions
600
Temperature
Conversion Time
t
CONVT
12-bit
conversions
1200
ms
SCL Frequency
f
SCL
400
KHz
Bus Free Time
Between a STOP and
START Condition
t
BUF
1.3
約
5
START and Repeated
START Hold Time
from Falling SCL
t
HD:STA
0.6
約
5, 6
Low Period of SCL
t
LOW
1.3
約
5
High Period of SCL
t
HIGH
0.6
約
5
Repeated START
Condition Setup Time
to Rising SCL
t
SU:STA
0.6
約
5
Data-Out Hold Time
from Falling SCL
t
HD:DAT
0
0.9
約
5
Data-In Setup Time to
Rising SCL
t
SU:DAT
100
ns
5
Rise Time of SDA and
SCL
t
R
20 + 0.1C
B
1000
ns
5, 7
Fall Time of SDA and
SCL
t
F
20 +
0.1C
B
300
ns
5, 7
STOP Setup Time to
Rising SCL
t
SU:STO
0.6
約
5
Capacitive Load for
Each Bus Line
C
B
400
pF
Input Capacitance
C
I
5
pF
NOTES:
1. All voltages are referenced to ground.
2. Internal heating caused by O.S. loading will cause the DS75 to read approximately 0.5癈 higher if
O.S. is sinking the max rated current.
3. I
DD
specified with O.S. pin open.
4. I
DD
specified with V
DD
at 5.0V and SDA, SCL = 5.0V, 0癈 to 70癈.
5. See Timing Diagram in Figure 2. All timing is referenced to 0.9 x V
DD
and 0.1 x V
DD
.
6. After this period, the first clock pulse is generated.
7. For example, if C
B
= 300pF, then t
R
[min] = t
F
[min] = 50ns.
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