Datasheet

50 C°
0 C°
60 C°
AmbientTemperature( C)
°
0 50 100
V
S
Temperature
3.3V
1.4V
PowerSupply(V)
50 C°
0 C°
60 C°
AmbientTemperature( C)
°
0 50 100
V
S
Temperature
3.3V
1.4V
PowerSupply(V)
0 50 100
0
OUTLogicState
Time(ms)
OUT=High
AtPower-on
OUT=High
AtPower-on
OUT=High
AfterConversion
OUT=Low
AfterConversion
Conversion
Time
t=35ms(max)D
HYST =High
HYST =High
SOH=Low
SET0
SET1
(a)
Time(ms)
(b)
0 50 100
0
Conversion
Time
t=35ms(max)D
HYST =High
HYST =High
SOH=Low
SET0
SET1
1
OUTLogicState
1
TMP303A
TMP303B
www.ti.com SBOS486B –JULY 2009–REVISED JANUARY 2011
TMP303A/B Power Up and Timing The tolerance of the thermal response time is largely
a result of the differences in conversion time, which
At device power-up, the TMP303A/B exerts OUT =
varies between 20ms and 35ms; likewise, this
high, and typically requires 26ms to return to a low
conversion does not take place after a power cycle
state only if the temperature falls within the hysteresis
until the supply voltage has reached a level of at least
window set by HYST
SET0
and HYST
SET1
.
1.4V. This sequence is illustrated in Figure 12.
Figure 12. TMP303A Start-Up Delay vs. Output Voltage (HYST
SET0
= HYST
SET1
= V
S
)
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