2癈 Accurate Remote/Local Temperature
Sensor with SMBus Serial Interface
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +3V to +5.5V, T
A
= -55癈 to +125癈, unless otherwise noted. Typical values are at V
CC
= +3.3V and T
A
= +25癈.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Logic Input Low Voltage
V
IL
V
CC
= +3.0V to +5.5V
+0.8
V
V
CC
= +3.0V
+2.2
Logic Input High Voltage
V
IH
V
CC
= +5.5V
+2.6
V
Input Leakage Current
I
LEAK
V
IN
= GND or V
CC
?
礎
V
OL
= +0.6V
+6
Output Low Sink Current
I
OL
V
OL
= +0.4V
+1
mA
Input Capacitance
C
IN
+5
pF
Output High Leakage Current
V
OH
= +5.5V
+1
礎
Serial Clock Frequency
f
SCL
(Note 4)
0
+100
kHz
Bus Free Time Between STOP
and START Conditions
t
BUF
+4.7
祍
START Condition Setup Time
+4.7
祍
Repeat START Condition Setup
Time
t
SU:STA
90% to 90%
+50
祍
START Condition Hold Time
t
HD:STA
10% of SMBDATA to 90% of SMBCLK
+4
祍
STOP Condition Setup Time
t
SU:STO
90% of SMBCLK to 10% of SMBDATA662
+4
祍
Clock Low Period
t
LOW
10% to 10%
+4.7
祍
Clock High Period
t
HIGH
90% to 90%
+4
祍
Data Setup Time
t
SU:DAT
90% of SMBDATA to 10% of SMBCLK
+250
ns
Data Hold Time
t
HD:DAT
(Note 5)
0
祍
Receive SCL/SDA Rise Time
t
R
+1
祍
Receive SCL/SDA Fall Time
t
F
+300
ns
SMBus Timeout
t
TIMEOUT
SMBDATA and SMBCLK time low for reset
of serial interface
+25
+40
ms
Note 1: +25?/SPAN>C d T
A
d +85癈.
Note 2: If both the MAX6690 and the remote junction are below T
A
= -20癈, then V
CC
> 3.15V.
Note 3: The conversion time doubles for the extended resolution mode. This causes the average operating current to approximately
double.
Note 4: The serial interface resets when SMBCLK is low for more than t
TIMEOUT
.
Note 5: Note that a transition must internally provide at least a hold time to bridge the undefined region (300ns max) of SMBCLKs
falling edge.
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