TMP05AKSZ-500RL7 View Datasheet(PDF) - Analog Devices
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Description
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TMP05AKSZ-500RL7 Datasheet PDF : 28 Pages
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The temperature equation for the high state conversion rate is
Temperature (°C) = 421 − (93.875 × (TH/TL))
(3)
Table 9. Conversion Times Using Equation 3
Temperature (°C) TL (ms)
High Cycle Time (ms)
–40
16.3
96.2
–30
16.7
96.6
–20
17
97.03
–10
17.4
97.42
0
17.8
97.84
10
18.3
98.27
20
18.7
98.73
25
19
98.96
30
19.2
99.21
40
19.7
99.71
50
20.2
100.24
60
20.8
100.8
70
21.4
101.4
80
22
102.02
90
22.7
102.69
100
23.4
103.4
110
24.1
104.15
120
25
104.95
130
25.8
105.81
140
26.7
106.73
150
27.7
107.71
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 TH/TL = 40 ms/ 76 ms
at 25°C.
Therefore, the temperature equation for the daisy-chain mode
of operation is
Temperature (°C) = 421 − (751 × (TH/TL))
(4)
TMP05/TMP06
OUT
MICRO
IN
CONV/IN
TMP05/
TMP06
#1
OUT
CONV/IN
TMP05/
TMP06
#2
OUT
CONV/IN
TMP05/
TMP06
#3
OUT
CONV/IN
TMP05/
TMP06
#N
OUT
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.
MUST GO HIGH ONLY
AFTER START PULSE HAS
BEEN OUTPUT BY LAST
TMP05/TMP06 ON DAISY CHAIN.
START
PULSE
<25µs
CONVERSION
STARTS ON
THIS EDGE
T0
TIME
Figure 26. Start Pulse at CONV/IN Pin of First TMP05/TMP06 Device
on Daisy Chain
#1 TEMP MEASUREMENT
START
PULSE
17µs
T0
TIME
Figure 27. Daisy-Chain Temperature Measurement
and Start Pulse Output from First TMP05/TMP06
Rev. 0 | Page 15 of 28
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