TMP100−EP, TMP101−EP

DIGITAL TEMPERATURE SENSOR

SGLS254A − JULY 2005 - REVISED APRIL 2010

8

POST OFFICE BOX 655303

APPLICATION INFORMATION

fault queue (F1/F0)

Additionally, the number of fault conditions required to generate an alert may be programmed using the fault

queue. The fault queue is provided to prevent a false alert due to environmental noise and requires consecutive

fault measurements to trigger the alert function. Table 7 defines the number of measured faults that may be

programmed to trigger an alert condition.

F1

F0

CONSECUTIVE FAULTS

0

0

1

0

1

2

1

0

4

1

1

6

Table 7. Fault Settings of the TMP100 and TMP101

converter resolution (R1/R0)

The converter resolution bits control the resolution of the internal analog-to-digital (A/D) converter. This allows

the user to maximize efficiency by programming for higher resolution or faster conversion time. Table 8 identifies

the resolution bits and relationship between resolution and conversion time.

R1

R0

RESOLUTION

CONVERSION TIME

(Typical)

0

0

9 Bits (0.5

°C)

40 ms

0

1

10 Bits (0.25

°C)

80 ms

1

0

11 Bits (0.125

°C)

160 ms

1

1

12 Bits (0.0625

°C)

320 ms

Table 8. Resolution of the TMP100

os/alert (OS)

The TMP100 and TMP101 feature a one-shot temperature measurement mode. When the device is in

shutdown mode, writing a 1 to the OS/ALERT bit starts a single temperature conversion. The device returns

to the shutdown state at the completion of the single conversion. This is useful to reduce power consumption

in the TMP100 and TMP101 when continuous monitoring of temperature is not required.

Reading the OS/ALERT bit provides information about the comparator mode status. The state of the POL bit

will invert the polarity of data returned from the OS/ALERT bit. For POL = 0, the OS/ALERT reads as 1 until the

for the programmed number of consecutive faults when it again reads as 1. The status of the TM bit does not

affect the status of the OS/ALERT bit.