ADM1032
ELECTRICAL CHARACTERISTICS
Parameter
Serial Bus Timing
(Note 2)
SDATA Output Low Sink Current
ALERT Output Low Sink Current
Logic Input Current, I
IH
, I
IL
Input Capacitance, SCLK, SDATA
Clock Frequency
SMBus Timeout (Note 3)
SCLK Clock Low Time, t
LOW
SCLK Clock High Time, t
HIGH
Start Condition Setup Time, t
SU:STA
Start Condition Hold Time, t
HD:STA
Stop Condition Setup Time, t
SU:STO
Data Valid to SCLK Rising Edge Time,
t
SU:DAT
Data Hold Time, t
HD:DAT
Bus Free Time, t
BUF
SCLK, SDATA Rise Time, t
R
SCLK, SDATA Fall Time, t
F
Between start/stop condition
Time from 10% of SDATA to 90% of SCLK
Time from 90% of SCLK to 10% of SDATA
Time for 10% or 90% of SDATA to 10% of SCLK
t
LOW
between 10% points
t
HIGH
between 90% points
1.3
0.6
600
600
600
100
300
1.3
300
300
25
SDATA forced to 0.6 V
ALERT forced to 0.4 V
6.0
1.0
−1.0
5.0
400
64
+1.0
mA
mA
mA
pF
kHz
ms
ms
ms
ns
ns
ns
ns
ns
ms
ns
ns
Conditions
Min
Typ
Max
Unit
1. See Table 6 for information on other conversion rates.
2. Guaranteed by design, not production tested.
3. The SMBus timeout is a programmable feature. By default, it is not enabled. Details on how to enable it are available in the Serial Bus
Interface section.
t
LOW
SCLK
t
R
t
F
t
HD:STA
t
HD:STA
SDATA
PS
t
HD:DAT
t
HIGH
t
SU:DAT
t
SU:STA
t
SU:STO
t
BUF
S
P
Figure 2. Diagram for Serial Bus Timing
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