TMP06BRTZ-500RL7 Ver la hoja de datos (PDF) - Analog Devices
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TMP06BRTZ-500RL7 Datasheet PDF : 28 Pages
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TMP05/TMP06
One Shot Mode
In one shot mode, the TMP05/TMP06 output one square wave
representing temperature when requested by the microcon-
troller. The microcontroller pulls the OUT pin low and then
releases it to indicate to the TMP05/TMP06 that an output is
required. The temperature measurement is output when the
OUT line is released by the microcontroller (see Figure 23).
µCONTROLLER PULLS DOWN µCONTROLLER RELEASES
OUT LINE HERE
OUT LINE HERE
TEMP MEASUREMENT
TH
TL
T0
TIME
Figure 23. TMP05/TMP06 One Shot OUT Pin Signal
In the TMP05 one shot mode only, an internal resistor is
switched in series with the pull-up MOSFET. The TMP05 OUT
pin has a push-pull output configuration (see Figure 24), and,
therefore, needs a series resistor to limit the current drawn on
this pin when the user pulls it low to start a temperature
conversion. This series resistance prevents any short circuit
from VDD to GND, and, therefore, protects the TMP05 from
short-circuit damage.
V+
5kΩ
OUT
TMP05
Figure 24. TMP05 One Shot Mode OUT Pin Configuration
The advantages of the one shot mode include lower average
power consumption, and the microcontroller knows that the
first low-to-high transition occurs after the microcontroller
releases the OUT pin.
Conversion Rate
In continuously converting and one shot modes, the state of the
CONV/IN pin on power-up determines the rate at which the
TMP05/TMP06 measure temperature. The available conversion
rates are shown in Table 7.
Table 7. Conversion Rates
CONV/IN Pin
Conversion Rate
Low
Quarter period
(TH ÷ 4, TL ÷ 4)
Floating
Nominal
High
Double high (TH x 2)
Quarter low (TL ÷ 4)
TH/TL (25°C)
10/19 (ms)
40/76 (ms)
80/19 (ms)
The TMP05 (push-pull output) advantage when using the high
state conversion rate (double high/quarter low) is lower power
consumption. However, the trade-off is loss of resolution on the
low time. Depending on the state of the CONV/IN pin, two
different temperature equations must be used.
The temperature equation for the low and floating states’
conversion rates is
Temperature (°C) = 421 − (751 × (TH/TL))
(2)
Table 8. Conversion Times Using Equation 2
Temperature (°C) TL (ms)
Nominal Cycle Time (ms)
–40
65.2
105
–30
66.6
107
–20
68.1
108
–10
69.7
110
0
71.4
111
10
73.1
113
20
74.9
115
25
75.9
116
30
76.8
117
40
78.8
119
50
81
121
60
83.2
123
70
85.6
126
80
88.1
128
90
90.8
131
100
93.6
134
110
96.6
137
120
99.8
140
130
103.2
143
140
106.9
147
150
110.8
151
Rev. 0 | Page 14 of 28
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