參數(shù)資料
型號(hào)： TMP05
廠商： Analog Devices, Inc.
元件分類： 溫度/濕度傳感器
英文描述： 【0.5∑C Accurate PWM Temperature Sensor in 5-Lead SC-70
中文描述： 【0.5ΣC高精度PWM溫度傳感器在5引腳SC - 70
文件頁(yè)數(shù)： 15/28頁(yè)
文件大小： 706K
代理商： TMP05
TMP05/TMP06
The temperature equation for the high state conversion rate is
Rev. 0 | Page 15 of 28
0
OUT
MICRO
IN
TMP05/
TMP06
#1
CONV/IN
OUT
TMP05/
TMP06
#2
CONV/IN
OUT
TMP05/
TMP06
#3
CONV/IN
OUT
TMP05/
TMP06
#N
CONV/IN
OUT
Temperature
(°C) = 421 (93.875 × (
T
H
/
T
L
))
(3)
Table 9. Conversion Times Using Equation 3
Temperature (°C)
T
L
(ms)
–40
16.3
–30
16.7
–20
17
–10
17.4
0
17.8
10
18.3
20
18.7
25
19
30
19.2
40
19.7
50
20.2
60
20.8
70
21.4
80
22
90
22.7
100
23.4
110
24.1
120
25
130
25.8
140
26.7
150
27.7
High Cycle Time (ms)
96.2
96.6
97.03
97.42
97.84
98.27
98.73
98.96
99.21
99.71
100.24
100.8
101.4
102.02
102.69
103.4
104.15
104.95
105.81
106.73
107.71
Figure 25. Daisy-Chain Structure
A second microcontroller line is needed to generate the conver-
sion start pulse on the CONV/IN pin. The pulse width of the
start pulse should be less than 25 μs. The start pulse on the
CONV/IN pin lets the first TMP05/TMP06 part know that it
should start a conversion and output its own temperature now.
Once the part has output its own temperature, it then outputs a
start pulse for the next part on the daisy-chain link. The pulse
width of the start pulse from each TMP05/TMP06 part is
typically 17 μs.
Figure 26 shows the start pulse on the CONV/IN pin of the first
device on the daisy chain and Figure 27 shows the PWM output
by this first part.
Daisy-Chain Mode
Setting the FUNC pin to a high state allows multiple TMP05/
TMP06s to be connected together and, therefore, allows one
input line of the microcontroller to be the sole receiver of all
temperature measurements. In this mode, the CONV/IN pin
operates as the input of the daisy chain, and conversions take
place at the nominal conversion rate of T
H
/T
L
= 40 ms/ 76 ms
at 25°C.
0
START
PULSE
<25
μ
s
T
0
TIME
CONVERSION
STARTS ON
THIS EDGE
MUST GO HIGH ONLY
AFTER START PULSE HAS
TMP05/TMP06 ON DAISY CHAIN.
Therefore, the temperature equation for the daisy-chain mode
of operation is
Figure 26. Start Pulse at CONV/IN Pin of First TMP05/TMP06 Device
on Daisy Chain
Temperature
(°C) = 421 (751 × (
T
H
/
T
L
))
(4)
0
START
PULSE
17
μ
s
#1 TEMP MEASUREMENT
T
0
TIME
Figure 27. Daisy-Chain Temperature Measurement
and Start Pulse Output from First TMP05/TMP06
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