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TMP121AIDBVTG4 Datasheet(PDF) 6 Page - Texas Instruments

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Part # TMP121AIDBVTG4
Description  1.5 C Accurate Digital Temperature Sensor with SPI田?Interface
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TMP121AIDBVTG4 Datasheet(HTML) 6 Page - Texas Instruments

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TMP121
TMP123
SBOS273C − JUNE 2003 − REVISED FEBRUARY 2005
www.ti.com
6
0.25s
0.5s
50
µA(active)
20
µA(idle)
Figure 2. Conversion Time and Period
The serial data of the TMP121 and TMP123 consists of
12-bit plus sign temperature data followed by a
confirmation bit and two high impedance bits. Data is
transmitted in Binary Two’s Complement format. Figure 3
describes the output data of the TMP121 and TMP123.
Timing Diagrams
The TMP121 and TMP123 are SPI-compatible. Figure 4
and Figure 5 describe the various timing requirements,
with parameters defined in Table 3.
PARAMETER
MIN
MAX
UNITS
SCK Period
t1
100
ns
SCK Falling Edge to Output Data Delay
t2
30
ns
CS to Rising Edge SCK Set-Up Time
t3
40
ns
CS to Output Data Delay
t4
30
ns
CS Rising Edge to Output High Impedance
t5
30
ns
Table 3. Timing Description
SO/I
SCK
CS
Z
Z
1
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
Z
Figure 3. Data READ
SCK
CS
SO
t
1
t
3
t
2
t
4
Figure 4. Output Data Timing Diagram
SCK
CS
SO
t
5
t
5
SCK
CS
SO
Figure 5. High Impedance Output Timing Diagram


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